@article{BitzerLaessoeFournieretal.2008,
  author    = {Bitzer, Jens and Laess{\o}e, Thomas and Fournier, Jaques and Kummer, Volker and Decock, Cony and Tichy, Hans-Volker and Piepenbring, Meike and Persoh, Derek and Stadler, Marc},
  title     = {Affinities of Phylacia and the daldinioid Xylariaceae, inferred from chemotypes of cultures and ribosomal DNA sequences},
  issn      = {0953-7562},
  year      = {2008},
  abstract  = {A chemotaxonomic evaluation using hplc profiling was undertaken to resolve the infrageneric and intergeneric affinities of over 150 strains of Xylariaceae. Daldinia placentiformis, Hypoxylon nicaraguense, H. polyporus, and Phylacia sagrana were found to contain 8-methoxy-1-naphthol, which is apparently absent in Annulohypoxylon, Hypoxylon, and related genera with bipartite stromata. D. placentiformis and other species of Daldinia and Entonaema produced this naphthol, 5-hydroxy-2-methylchromone, isosclerone derivatives, and 'AB-5046' phytotoxins. Phylacia sagrana differed from most Daldinia spp., except for D. caldariorum, by producing eutypine derivatives in addition to the above compounds. indolylquinones were observed in H. nicaraguense and H. polyporus. Isosclerones were also identified in the A. multiforme complex, but Hypoxylon and other Annulohypoxylon and most Hypoxylon spp. studied Annulohypoxylon spp. contained S-methylmellein as the major metabolite of their cultures. Based on the occurrence of the above metabolites, further mellein-type dihydroisocoumarins, teleomorphic and anamorphic Xylariaceae with Nodulisporium-like anamorphs ('Hypoxyloideae') were divided into various chemotypes. A comparison of their 5.8S/ ITS nuc-rDNA sequences agreed in some important aspects with the above results: H. nicaraguense and H. polyporus appeared basal to a clade comprising Daldinia, Entonaema, and Ph. sagrana. The latter species appeared allied to D. caldariorum, but was distantly related to Pyrenomyxa morganii and Hypoxylon s. str. (C) 2007 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.},
  language  = {en}
}
@article{BenkertKummer1993,
  author    = {Benkert, Dieter and Kummer, Volker},
  title     = {Amanita vittadinii in Brandenburg},
  year      = {1993},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Auf der Suche nach der "Blauen Blume"},
  year      = {1998},
  language  = {de}
}
@article{KummerLuschkaOtto2005,
  author    = {Kummer, Volker and Luschka, Norbert and Otto, Peter},
  title     = {Aufruf f{\"u}r neue Serien zur Kartierung der Pilze Ostdeutschlands},
  year      = {2005},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Beitrag zur Flora des Potsdamer Stadtgebietes},
  issn      = {0724-3111 -},
  year      = {2003},
  language  = {de}
}
@article{KummerBuhr2006,
  author    = {Kummer, Volker and Buhr, Christoph},
  title     = {Beitrag zur Flora des Potsdamer Stadtgebietes II},
  year      = {2006},
  language  = {de}
}
@article{BuhrKummer2010,
  author    = {Buhr, Christoph and Kummer, Volker},
  title     = {Beitrag zur Flora des Potsdamer Stadtgebietes III},
  issn      = {0945-4292},
  year      = {2010},
  abstract  = {A list of rare or interesting phanerogams from Potsdam and surroundings is presented. Most of them were recorded between 2006 and 2008. In some cases short remarks about the taxonomy, distribution and other details are given. The collections of Geranium purpureum and Parietaria judaica are the first records for Brandenburg. The collections of Agastache foeniculum, Coreopsis lanceolata, Geranium nodosum, Hieracium amplexicaule, Juncus ensifolius, Lactuca virosa, Sedum sarmentosum and Verbena bonariensis are probably the first information about adventive occurences of these species in this Federal State. Viscum album is reported on rare host species: Chaenomelis sp., Quercus spp. and Rosa hybrids.},
  language  = {de}
}
@article{JageKummerIlligetal.2006,
  author    = {Jage, Horst and Kummer, Volker and Illig, Hubert and Petrick, Wolfgang},
  title     = {Beitrag zur Kenntnis phytoparasitischer Kleinpilze in der Niederlausitz (Land Brandenburg) : Teil 2},
  year      = {2006},
  language  = {de}
}
@article{Kummer1999,
  author    = {Kummer, Volker},
  title     = {Beitrag zur Pilzflora des Neuzeller Fasanenwaldes},
  year      = {1999},
  language  = {de}
}
@article{Kummer2008,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 07.10.07 in der Calauer Schweiz bei Cabel},
  year      = {2008},
  language  = {de}
}
@article{Kummer2006,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 09.10.05 in der Umgebung der F{\"o}rsterei Rochau},
  year      = {2006},
  language  = {de}
}
@article{Kummer2005,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 10.10.2004 im Bereich des Drehnaer Weinberges},
  year      = {2005},
  language  = {de}
}
@article{Kummer2009,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 12.10.08 im Kasel- Reichwalder Busch bei Reichwalde},
  issn      = {1432-4199},
  year      = {2009},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 03.10.97 zum Nordufer des Sandteiches bei F{\"u}rstlich Drehna},
  year      = {1998},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 05.10.02 bei Prierow},
  year      = {2004},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 06.10.02 bei St{\"o}britz-Willmersdorf sowie {\"o}stlich von Egsdorf},
  year      = {2003},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 07.10.00 im Gebiet des Tiergartens s{\"u}dlich Weißack},
  year      = {2001},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 07.10.01 im Gebiet des ehem. Tagebaus Schlabendorf-Nord},
  year      = {2002},
  language  = {de}
}
@article{Kummer2000,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 10.10.99 im Krossener Busch},
  year      = {2000},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : I. Bemerkenswerte und seltene Funde aus dem Unterspreewaldgebiet},
  year      = {1996},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : II. Die Myxo- und Makromyceten (Ascomycetes, Basidiomycetes) im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald) ; Teil 1},
  year      = {2003},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : II. Die Myxo- und Makromyceten (Ascomycetes, Basidiomycetes) im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald) ; Teil 2},
  year      = {2004},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : III. Die phytoparasitischen Pilze im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald)},
  year      = {2001},
  language  = {de}
}
@article{KummerKuemmerlingRaetzeletal.1995,
  author    = {Kummer, Volker and K{\"u}mmerling, Heidi and R{\"a}tzel, Stefan and Otte, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg : eine Anregung zur floristischen Arbeit},
  year      = {1995},
  language  = {de}
}
@article{OtteRaetzelKummer1997,
  author    = {Otte, Volker and R{\"a}tzel, Stefan and Kummer, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg III},
  year      = {1997},
  language  = {de}
}
@article{OtteRaetzelSipmanetal.2000,
  author    = {Otte, Volker and R{\"a}tzel, Stefan and Sipman, Harri J. M. and Kummer, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg V},
  year      = {2000},
  language  = {de}
}
@article{OtteRaetzelKummeretal.2001,
  author    = {Otte, Volker and R{\"a}tzel, Stefan and Kummer, Volker and De Bruyn, Uwe},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg VI},
  year      = {2001},
  language  = {de}
}
@article{RaetzelKummerOtteetal.2002,
  author    = {R{\"a}tzel, Stefan and Kummer, Volker and Otte, Volker and Sipman, Harri J. M},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg VII},
  year      = {2002},
  language  = {de}
}
@article{BruyunLitterskiKummer1999,
  author    = {Bruyun, U. and Litterski, B. and Kummer, Volker},
  title     = {Bemerkenswerte Funde lichenisierter und lichenicoler Pilze in Mecklenburg-Vorpommern},
  year      = {1999},
  language  = {de}
}
@article{Kummer1999,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Lamellenpilzfunde aus Brandenburg},
  year      = {1999},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 1. Wasserpflanzen ; Teil 1},
  year      = {2002},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 1. Wasserpflanzen ; Teil 2},
  year      = {2003},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 2. Moorflanzen ; Teil 1},
  year      = {2007},
  language  = {de}
}
@article{Kummer2008,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 2. Moorflanzen ; Teil 2},
  year      = {2008},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf den Tagungen des Botanischen Vereins in Linowsee und Finowfurth},
  year      = {2002},
  language  = {de}
}
@article{KummerJage2003,
  author    = {Kummer, Volker and Jage, Horst},
  title     = {Bemerkenswerte Pilzfunde auf der 33. Brandenburgischen Botanikertagung in Perleberg},
  year      = {2003},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 34. Brandenburgischen Botanikertagung in Ortrand},
  issn      = {0724-3111 -},
  year      = {2004},
  language  = {de}
}
@article{Kummer2005,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 35. Brandenburgischen Botanikertagung in Storkow},
  year      = {2005},
  language  = {de}
}
@article{Kummer2006,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 36. Brandenburgischen Botanikertagung in Hohenspringe/Flaeming},
  year      = {2006},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 37. Brandenburgischen Botanikertagung in Neuendorf bei Oranienburg},
  issn      = {0945-4292},
  year      = {2007},
  language  = {de}
}
@article{Kummer2010,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 38. Brandenburgischen Botanikertagung in Groß Pinnow/Uckermark},
  issn      = {9454-4292},
  year      = {2010},
  language  = {de}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde aus dem nordwestlichen Unterspreewald-Randgebiet},
  year      = {1994},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Beobachtungen zu Pithya cupressina andchloroscypha alutipes},
  year      = {1998},
  language  = {de}
}
@article{KummerMiersch2001,
  author    = {Kummer, Volker and Miersch, J{\"u}rgen},
  title     = {Bericht {\"u}ber eine einw{\"o}chige mykologische Exkursion nach Gotland im Herbst 1999},
  year      = {2001},
  language  = {de}
}
@article{Kummer2000,
  author    = {Kummer, Volker},
  title     = {Botanisch Bemerkenswertes aus der Potsdamer Umgebung : eine Auswahl},
  year      = {2000},
  language  = {de}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {Botanische Exkursion ins Wolfsbruch bei Alt T{\"o}plitz},
  year      = {1994},
  language  = {de}
}
@article{ScherberEisenhauerWeisseretal.2010,
  author    = {Scherber, Christoph and Eisenhauer, Nico and Weisser, Wolfgang W. and Schmid, Bernhard and Voigt, Winfried and Fischer, Markus and Schukze, Ernst-Detlef and Roscher, Christiane and Weigelt, Alexandra and Allan, Eric and Beßler, Holger and Bonkowski, Michael and Buchmann, Nina and Buscot, Fran{\c{c}}ois and Clement, Lars W. and Ebeling, Anne and Engels, Christof and Halle, Stefan and Kertscher, Ilona and Klein, Alexandra-Maria and Koller, Robert and K{\"o}nig, Stephan and Kowalski, Esther and Kummer, Volker and Kuu, Annely and Lange, Markus and Lauterbach, Dirk},
  title     = {Bottom-up effects of plant diversity on multitrophic interactions in a biodiversity experiment},
  issn      = {0028-0836},
  year      = {2010},
  language  = {en}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {B{\"u}rgert sich Gypsophila perfoliata in Brandenburg ein?},
  year      = {1994},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Cochlearia danica nun auch in Brandenburg},
  year      = {2002},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Der Abriß der Neuen Sch{\"a}nke},
  year      = {1996},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Der Große Burgwall bei Havelberg : ein bemerkenswerter Pilzstandort},
  year      = {1997},
  language  = {de}
}
@article{Kummer2006,
  author    = {Kummer, Volker},
  title     = {Der L{\"u}bbener Rudolf Marloth (1855-1931) als Botaniker in S{\"u}dafrika - eine Lebensskizze},
  year      = {2006},
  language  = {de}
}
@article{KoernerSeitzJentschetal.2002,
  author    = {K{\"o}rner, Sabine and Seitz, Birgit and Jentsch, Helmut and Kummer, Volker},
  title     = {Der Spreewald : Lebensraum f{\"u}r gef{\"a}hrdete Pflanzenarten},
  year      = {2002},
  language  = {de}
}
@article{RaetzelKummer2010,
  author    = {Raetzel, Stefan and Kummer, Volker},
  title     = {Die Erforschung der in Brandenburg vorkommenden Kryptogamen nach 1945 (Moose, Pilze)},
  year      = {2010},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Die Exkursion zum Gollwitzer Havelufer},
  year      = {1996},
  language  = {de}
}
@article{KummerBurkart1997,
  author    = {Kummer, Volker and Burkart, Michael},
  title     = {Die Flora der Stromtalwiesen an der unteren Havel und andere botanische Besonderheiten},
  year      = {1997},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Die Krausnicker Schule zu Beginn des 19. Jahrhunderts : ein Beitrag zur Gechichte des Unterspreewaldortes},
  year      = {1993},
  language  = {de}
}
@article{Kummer1995,
  author    = {Kummer, Volker},
  title     = {Die Salzbunge (Samolus valerandi) im Bornimer Schlangenbruch wieder gefunden},
  year      = {1995},
  language  = {de}
}
@article{KuehlingBorkKummer2000,
  author    = {K{\"u}hling, Matthias and Bork, Hans-Rudolf and Kummer, Volker},
  title     = {Die W{\"u}ste Atacama},
  year      = {2000},
  language  = {de}
}
@article{ThinesKummer2013,
  author    = {Thines, Marco and Kummer, Volker},
  title     = {Diversity and species boundaries in floricolous downy mildews},
  series = {Mycological progress : international journal of the German Mycological Society},
  volume    = {12},
  journal   = {Mycological progress : international journal of the German Mycological Society},
  number    = {2},
  publisher = {Springer},
  address   = {Heidelberg},
  issn      = {1617-416X},
  doi       = {10.1007/s11557-012-0837-7},
  pages     = {321 -- 329},
  year      = {2013},
  abstract  = {Floricolous downy mildews are a monophyletic group of members of the genus Peronospora (Oomycota, Peronosporales). These downy mildews can be found on a variety of families of the Asteridae, including Asteraceae, Campanulaceae, Dipsacaceae, Lamiaceae, and Orobanchaceae. With the exception of Peronospora radii, which can also cause economically relevant losses, sporulation usually takes place only on floral parts of their hosts. However, only very few specimens of these mostly inconspicuous downy mildews have so far been included in molecular phylogenies. Focusing on Lamiaceae, we have investigated multiple specimens of floricolous downy mildews for elucidating species boundaries and host specificity in this group. Based on both mitochondrial and nuclear loci, it became apparent that phylogenetic lineages in the Lamiaceae seem to be host genus specific and significant sequence diversity could be found between lineages. Based on distinctiveness in both phylogenetic reconstructions and morphology, the downy mildew on flowers of Stachys palustris is introduced as a new species, Peronospora jagei sp. nov., which can be morphologically distinguished from Peronospora stigmaticola by broader and shorter conidiospores. The diversity of the floricolous down mildews might be higher than previously assumed, although specimens from a much broader set of samples will be needed to confirm this view.},
  language  = {en}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Dr. Dieter Benkert zum 70. Geburtstag},
  issn      = {0724-3111 -},
  year      = {2004},
  language  = {de}
}
@article{FischerKummer1995,
  author    = {Fischer, Wolfgang and Kummer, Volker},
  title     = {Ein Beitrag zur Pilzflora der H{\"o}llenberge bei Langengrassau},
  year      = {1995},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Ein Beitrag zur Pilzflora des G{\"o}rlsdorfer Waldes},
  year      = {1997},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Ein kurzer Einblick in die Vielfalt unserer heimischen Pilze},
  year      = {1998},
  language  = {de}
}
@article{Kummer2000,
  author    = {Kummer, Volker},
  title     = {Ein kurzer Einblick in die Vielfalt unserer heimischen Pilze II},
  year      = {2000},
  language  = {de}
}
@article{Kummer2005,
  author    = {Kummer, Volker},
  title     = {Ein Vorkommen von Draba muralis L. im Potsdamer Stadtgebiet},
  year      = {2005},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Ein Vorkommen von Glyceria striata im Springbruch bei Potsdam},
  year      = {2002},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Eine botanische Wanderung rund um den Neuendorfer See},
  year      = {1997},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {Einige Aspekte der Pilzflora im Bol'soj Thac-Gebiet (NW-Kaukasus)},
  year      = {2007},
  abstract  = {Some aspects of the fungal flora in the Bol'{\"U}oj Tha; area (NW-Caucasus) - During an excursion to the Bol'soj Tha; area in north-western Caucasus in the late summer of 1998 a number of mycological observations were made. 111 macrofungi species (30 ascomycetes, 81 basidiomycetes), 16 myxomycetes and 42 phytoparasitic fungi (15 Erysiphales, 27 Uredinales) were registered. The majority of the recorded macromycetes were decomposers of dead stems and logs of different trees and shrubs, especially of the dominating tree species Fagus orientalis and Abies nordmanniana. Bondarzewia montana, Hericium alpestre and Phellinus hartigii are typical colonisers of old Abies trunks and therefore of special interest. They were recorded several times, especially in the primeval forests of the excursion area. Some of the collected taxa like Daldinia petriniae, Hypoxylon cercidicola, H. liviae, Ophiostoma polyporicola, Pezoloma marchantiae, Ramsbottomia macracantha, Symphyosyria angelicae, Auriporia aurulenta, Flagelloscypha pilatii, Hymenochaete carpatica, Marasmius cf. rhododendrorum and Pellidiscus pallidus are discussed in detail. Some of the recorded taxa are probably new for the western Caucasus and in some cases also for Russia.},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Einige interessante Neub{\"u}rger der Potsdamer Umgebung},
  year      = {1997},
  language  = {de}
}
@article{KummerJentsch1997,
  author    = {Kummer, Volker and Jentsch, Helmut},
  title     = {Elodea nuttallii (PLANCH.), St, Johan nun auch in Brandenburg},
  year      = {1997},
  language  = {de}
}
@article{AleAghaBolayBraunetal.2004,
  author    = {Ale-Agha, Nosratollah and Bolay, Adrien and Braun, Uwe and Jage, Horst and Kummer, Volker and Lebeda, Ales and Piatek, Marcin and Shin, Hyeon-Dong and Zimmermannova-Pastircakova, Katarina},
  title     = {Erysiphe catalpae and E. elevata in Europe},
  year      = {2004},
  language  = {en}
}
@article{BolayBraunDelheyetal.2005,
  author    = {Bolay, Adrien and Braun, Uwe and Delhey, Rolf and Kummer, Volker and Piatek, Marcin and Wolczanska, Agata},
  title     = {Erysiphe deutziae - a new epidemic spread in Europe},
  year      = {2005},
  abstract  = {Erysiphe deutziae (Bunkina) U. Braun \& S. Takam. is powdery mildew fungus that is currently spreading in Europe. The anamorph of this species has been found in France, Germany, Poland and Switzerland on Deutzia sp. (cult.), Deutzia x magnifica (Lemoine) Rehder and Deutzia scabra Thunb. The morphology, taxonomy and worldwide distribution of Erysiphe deutziae are described, illustrated and discussed},
  language  = {en}
}
@article{BolayBraunDelheyetal.2005,
  author    = {Bolay, Adrien and Braun, Uwe and Delhey, Rolf and Kummer, Volker and Piatek, Marcin and Wolczanska, Agata},
  title     = {Erysiphe deutziae : a new epidemic spread in Europe},
  year      = {2005},
  abstract  = {Erysiphe deutziae (Bunkina) U. Braun \& S. Takam. is powdery mildew fungus that is currently spreading in Europe. The anamorph of this species has been found in France, Germany, Poland and Switzerland on Deutzia sp. (cult.), Deutzia x magnifica (Lemoine) Rehder and Deutzia scabra Thunb. The morphology, taxonomy and worldwide distribution of Erysiphe deutziae are described, illustrated and discussed},
  language  = {en}
}
@article{KasparzKummer2003,
  author    = {Kasparz, Sven and Kummer, Volker},
  title     = {Exkursionsbericht "Exkursion zu den L{\"u}bbener Pfaffenbergen und Hartmannsdorfer Wiesen" am 20.07.2002},
  issn      = {0724-3111 -},
  year      = {2003},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Exkursionsbericht "Exkursion zum S{\"u}dufer des Dolgener Sees und zum Schwarzen Luch bei Groß Leuthen" am 05.08.2000},
  year      = {2001},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Exkursionsbericht "Neuendorfer Se/Unterspreewald" am 31.08.1996},
  year      = {1996},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Farbenfroh und verg{\"a}nglich},
  year      = {1997},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Flora und Vegetation im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald)},
  year      = {1998},
  language  = {de}
}
@article{BurkartKummerFischer1995,
  author    = {Burkart, Michael and Kummer, Volker and Fischer, Wolfgang},
  title     = {Floristische Neu- und Wiederfunde im Gebiet der Unteren Havel},
  year      = {1995},
  language  = {de}
}
@article{JentschKummer1994,
  author    = {Jentsch, Helmut and Kummer, Volker},
  title     = {Floristische Neufunde aus dem Spreewald},
  year      = {1994},
  language  = {de}
}
@article{GrosseBrauckmannKummer2004,
  author    = {Grosse-Brauckmann, Helga and Kummer, Volker},
  title     = {F{\"u}nf bemerkenswerte Funde corticioider Pilze aus Deutschland},
  issn      = {0014-8962},
  year      = {2004},
  language  = {de}
}
@article{RottstockJoshiKummeretal.2014,
  author    = {Rottstock, Tanja and Joshi, Jasmin Radha and Kummer, Volker and Fischer, Markus},
  title     = {Higher plant diversity promotes higher diversity of fungal pathogens, while it decreases pathogen infection per plant},
  series = {Ecology : a publication of the Ecological Society of America},
  volume    = {95},
  journal   = {Ecology : a publication of the Ecological Society of America},
  number    = {7},
  publisher = {Wiley},
  address   = {Washington},
  issn      = {0012-9658},
  pages     = {1907 -- 1917},
  year      = {2014},
  abstract  = {Fungal plant pathogens are common in natural communities where they affect plant physiology, plant survival, and biomass production. Conversely, pathogen transmission and infection may be regulated by plant community characteristics such as plant species diversity and functional composition that favor pathogen diversity through increases in host diversity while simultaneously reducing pathogen infection via increased variability in host density and spatial heterogeneity. Therefore, a comprehensive understanding of multi-host multi-pathogen interactions is of high significance in the context of biodiversity-ecosystem functioning. We investigated the relationship between plant diversity and aboveground obligate parasitic fungal pathogen ("pathogens" hereafter) diversity and infection in grasslands of a long-term, large-scale, biodiversity experiment with varying plant species (1-60 species) and plant functional group diversity (1-4 groups). To estimate pathogen infection of the plant communities, we visually assessed pathogen-group presence (i.e., rusts, powdery mildews, downy mildews, smuts, and leaf-spot diseases) and overall infection levels (combining incidence and severity of each pathogen group) in 82 experimental plots on all aboveground organs of all plant species per plot during four surveys in 2006. Pathogen diversity, assessed as the cumulative number of pathogen groups on all plant species per plot, increased log-linearly with plant species diversity. However, pathogen incidence and severity, and hence overall infection, decreased with increasing plant species diversity. In addition, co-infection of plant individuals by two or more pathogen groups was less likely with increasing plant community diversity. We conclude that plant community diversity promotes pathogen-community diversity while at the same time reducing pathogen infection levels of plant individuals.},
  language  = {en}
}
@article{KuehlingKummer1999,
  author    = {K{\"u}hling, Matthias and Kummer, Volker},
  title     = {Im Land der Araukarier},
  year      = {1999},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Kommt Plagiothecium undulatum (HEDW) B.S.G. noch in der Niederlausitz vor?},
  year      = {1997},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Korrekturen und Erg{\"a}nzungen zur Pilzflora des Unteren Haveltales.-},
  year      = {2001},
  language  = {de}
}
@article{KummerJentsch2001,
  author    = {Kummer, Volker and Jentsch, Helmut},
  title     = {Korrekturen und Nachtr{\"a}ge als Vorarbeit zu einer Flora des Spreewaldes},
  year      = {2001},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {List of fungi (ascomycetes, basidiomycetes, myxomycetes and phytoparasitic fungi) recorded in the Bol'soj Thac area between the so called "Devils gate" (Acesbok) and the village Novoprohladnoe},
  year      = {2007},
  abstract  = {The list contains all the identified fungi collections of the excursion in 1998. In it were also included some records published by OTTO (2001) and few unpublished data of fungi mainly collected by V. Otte after 1998. Unless other information is given, all the fungal collections and their determination were done by the author. Most of the collections are integrated as exsiccata in the herbarium of the author.},
  language  = {en}
}
@article{RistowHerrmannIlligetal.2006,
  author    = {Ristow, Michael and Herrmann, Andreas and Illig, Hubert and Klemm, Gunther and Kummer, Volker and Kl{\"a}ge, Hans-Christian and Machatzi, Bernd and Raetzel, Stefan and Schwarz, R. and Zimmermann, Friedrich},
  title     = {Liste und Rote Liste der etablierten Gef{\"a}ßpflanzen Brandenburgs},
  year      = {2006},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Literaturhinweis},
  year      = {2002},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Loweomyces fractipes im Unterspreewald gefunden},
  year      = {1998},
  language  = {de}
}
@article{AliRungeDutbayevetal.2016,
  author    = {Ali, Tahir and Runge, Fabian and Dutbayev, Ayan and Schmuker, Angelika and Solovyeva, Irina and Nigrelli, Lisa and Buch, Ann-Katrin and Xia, Xiaojuan and Ploch, Sebastian and Orren, Ouria and Kummer, Volker and Paule, Juraj and Celik, Ali and Vakhrusheva, Ljudmila and Gabrielyan, Ivan and Thines, Marco},
  title     = {Microthlaspi erraticum (Jord.) T. Ali et Thines has a wide distribution, ranging from the Alps to the Tien Shan},
  series = {Flora : morphology, distribution, functional ecology of plants},
  volume    = {225},
  journal   = {Flora : morphology, distribution, functional ecology of plants},
  publisher = {American Chemical Society},
  address   = {Jena},
  issn      = {0367-2530},
  doi       = {10.1016/j.flora.2016.09.008},
  pages     = {76 -- 81},
  year      = {2016},
  abstract  = {Microthlaspi is a predominantly Eurasian genus which also occurs in the northernmost parts of Africa (Maghreb). The most widespread species of the genus is M. perfoliatum, which can be found from Sweden to Algeria and from Portugal to China. The other species are thought to have much more confined distribution ranges, often covering only a few hundred kilometres. This is also believed for the diploid M. erraticum, which was recently re-appraised as a taxon independent from the tetra- to hexaploid M. perfoliatum. Previously, M. erraticum was believed to be present only in Central Europe, from the East of France to Slovenia. In order to gain a deeper understanding of the ecology, evolution and migration history of Microthlaspi it was the focus of the current study to investigate, if M. erraticum is present in habitats outside Central Europe, but with microclimates similar to Central Europe. It is demonstrated that M. erraticum is much more widespread than previously thought, while other lineages apart from M. perfoliatum s.str. and M. erraticum seem to have restricted distribution ranges. The latter species was observed from the Alps and their foreland, the Balkans, the mountainous areas around the Black Sea, Southern Siberia, as well as the Altai and Tien Shan mountains. This demonstrates a widespread occurrence of this easily-overlooked species. (C) 2016 Elsevier GmbH. All rights reserved.},
  language  = {en}
}
@article{ChoiKlostermanKummeretal.2015,
  author    = {Choi, Young-Joon and Klosterman, Steven J. and Kummer, Volker and Voglmayr, Hermann and Shin, Hyeon-Dong and Thines, Marco},
  title     = {Multi-locus tree and species tree approaches toward resolving a complex clade of downy mildews (Straminipila, Oomycota), including pathogens of beet and spinach},
  series = {Molecular phylogenetics and evolution},
  volume    = {86},
  journal   = {Molecular phylogenetics and evolution},
  publisher = {Elsevier},
  address   = {San Diego},
  issn      = {1055-7903},
  doi       = {10.1016/j.ympev.2015.03.003},
  pages     = {24 -- 34},
  year      = {2015},
  abstract  = {Accurate species determination of plant pathogens is a prerequisite for their control and quarantine, and further for assessing their potential threat to crops. The family Peronosporaceae (Straminipila; Oomycota) consists of obligate biotrophic pathogens that cause downy mildew disease on angiosperms, including a large number of cultivated plants. In the largest downy mildew genus Peronospora, a phylogenetically complex clade includes the economically important downy mildew pathogens of spinach and beet, as well as the type species of the genus Peronospora. To resolve this complex clade at the species level and to infer evolutionary relationships among them, we used multi-locus phylogenetic analysis and species tree estimation. Both approaches discriminated all nine currently accepted species and revealed four previously unrecognized lineages, which are specific to a host genus or species. This is in line with a narrow species concept, i.e. that a downy mildew species is associated with only a particular host plant genus or species. Instead of applying the dubious name Peronospora farinosa, which has been proposed for formal rejection, our results provide strong evidence that Peronospora schachtii is an independent species from lineages on Atriplex and apparently occurs exclusively on Beta vulgaris. The members of the clade investigated, the Peronospora rumicis clade, associate with three different host plant families, Amaranthaceae, Caryophyllaceae, and Polygonaceae, suggesting that they may have speciated following at least two recent inter-family host shifts, rather than contemporary cospeciation with the host plants. (C) 2015 Elsevier Inc. All rights reserved.},
  language  = {en}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Neue Erkenntnisse {\"u}ber den Ursprung der Krausnicker Kirche und ihre Einordnung in die damalige Kirchenbauentwicklung},
  year      = {1998},
  language  = {de}
}
@article{JageKlenkeKummer2010,
  author    = {Jage, Horst and Klenke, F. and Kummer, Volker},
  title     = {Neufunde und bemerkenswerte Best{\"a}tigungen von phytoparasitischen Kleinpilzen in Deutschland - Teil 1 : Erysiphales (Echte Mehltaupilze)},
  issn      = {1436-2317},
  year      = {2010},
  abstract  = {Members of the Erysiphales are conspicuous phytoparasitic microfungi during the late summer and autumn period. A lot of literature sources were evaluated by BRANDENBURGER \& HAGEDORN (2006). They give an overview of the floristic data of the separate Erysiphales-host-combinations in the individual federal states of Germany. Unfortunately, most of the articles published after 2000 and especially many unpublished data assembled since 1970s have not been included. Therefore the present list is a supplementa-tion to BRANDENBURGER \& HAGEDORN (2006). A total of 1.994 new records of Erysiphales-host-combinations from all federal states of Germany the Saarland excluded have been listed. Most of them are from Brandenburg, Saxony and Saxony-Anhalt. In contrast to that obvious deficits clearly exist in the federal states of Bremen, Hamburg, Hessen and Mecklenburg-Western Pomerania. Compared to BRANDENBURGER \& HAGEDORN (2006) only the first record of the respective Erysiphales-host-combination in the particular federal states of Germany is given. If the last record of an Erysiphales-host-combination is older than 25 years in some cases a new record is also listed. Since 2000 17 Erysiphales taxa have been collected in Germany for the first time. All in all 97 matrices novae especially different cultivated plants are compiled. 49 resp. 59 fungus-host-combinations are new for Europe and Central Europe and furthermore 199 combinations are new for Germany. 54 records are the first exact data for the occurrence of the fungus- host-combination in Germany. These combinations have been listed globally in the literature for Germany until today but without any exact data. A part of the given records offer double infections with other phytoparasitic micro-fungi. These infections have been represented summarily. A list of fungus-host-combinations published in the literature but not clearly recorded for Germany is given.},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Notizen zu einem Vorkommen des Roten Waldv{\"o}geleins bei Falkensee},
  year      = {1993},
  language  = {de}
}
@article{Kummer2000,
  author    = {Kummer, Volker},
  title     = {Notizen zur Pilzflora des L{\"u}bbener " Hains"},
  year      = {2000},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Notizen {\"u}ber den Amtsgarten zu Krausnick},
  year      = {1993},
  language  = {de}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {Notizen {\"u}ber einige Adventivpflanzenfunde auf dem Krausnicker M{\"u}llplatz},
  year      = {1994},
  language  = {de}
}
@article{KummerHaneltHaneltetal.2010,
  author    = {Kummer, Volker and Hanelt, Dorothea and Hanelt, Peter and Jage, Horst and John, Heino and Richter, Heidrun and Richter, Udo and Schultz, Burkhard},
  title     = {Phyllactinia hippopha{\"e}s (Erysiphales) rediscovered in Germany},
  issn      = {1641-8180},
  year      = {2010},
  abstract  = {The Erysiphales species Phyllactinia hippopha{\"e}s Thuem. ex S. Blumer was found for the fi rst time on cultivated Sea Buckthorn (Hippopha{\"e} rhamnoides L.) near Großkayna (Saxony-Anhalt) in October 2009. This fungus was considered to be extinct in Germany. Intensive searching in Saxony-Anhalt and the Potsdam area (Brandenburg) yielded many additional records, most of them from former brown coal mining areas or in Sea Buckthorn plantations.},
  language  = {en}
}