TY  - JOUR
A1  - Duwenig, Elke
A1  - Steup, Martin
A1  - Willmitzer, Lothar
A1  - Kossmann, Jens
T1  - Antisense inhibition of cytosolic phosphorylase in potato plants (Solanum tuberosum L.) affects tuber sprouting and flower formation with only little impact on carbohydrate metabolism
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Duwenig, Elke
A1  - Steup, Martin
A1  - Kossmann, Jens
T1  - Induction of genes encoding plastidic phosphorylase from spinach (Spinacia oleracea L.) and potato (Solanum tuberosum L.) by exogenously supplied carbohydrates in excised leaf discs
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Lorberth, Ruth
A1  - Ritte, Gerhard
A1  - Willmitzer, Lothar
A1  - Kossmann, Jens
T1  - Inhibition of a starch-granule-bound protein leads to modified starch and repression of cold sweetening
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Yu, Tien-Shin
A1  - Kofler, Heike
A1  - Häusler, Rainer E.
A1  - Hille, Diana
A1  - Flügge, Ulf-Ingo
A1  - Zeeman, Samuel C.
A1  - Smith, Alison M.
A1  - Kossmann, Jens
A1  - Lloyd, James R.
A1  - Ritte, Gerhard
A1  - Steup, Martin
A1  - Lue, Wei-Ling
A1  - Chen, Jychian
A1  - Weber, Andreas P. M.
T1  - The Arabidopsis sex1 mutant is defective in the R1 protein, a general regulator of starch degradation in plants, and not in the chloroplast hexose transporter
Y1  - 2001
SN  - 1040-4651
ER  - 
TY  - JOUR
A1  - Ritte, Gerhard
A1  - Lloyd, James R.
A1  - Eckermann, Nora
A1  - Rottmann, Antje
A1  - Kossmann, Jens
A1  - Steup, Martin
T1  - The starch-related R1 protein is an a-glucan, water dikinase
Y1  - 2002
SN  - 0027-8424
ER  - 
TY  - JOUR
A1  - Ritte, Gerhard
A1  - Steup, Martin
A1  - Kossmann, Jens
A1  - Lloyd, James R.
T1  - Determination of the starch phosphorylating enzyme activity in plant extracts
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Zimmermann, P.
A1  - Regierer, Babette
A1  - Kossmann, Jens
A1  - Frossard, Emmanuel
A1  - Amrhein, Nikolaus
A1  - Bucher, Matthias
T1  - Differential expression of three purple acid phosphatases from potato
N2  - Three cDNAs encoding purple acid phosphatase (PAP) were cloned from potato (Solanum tuberosum L. cv. Desiree) and expression of the corresponding genes was characterised. StPAP1 encodes a low-molecular weight PAP clustering with mammalian, cyanobacterial, and other plant PAPs. It was highly expressed in stem and root and its expression did not change in response to phosphorus (P) deprivation. StIPAP2 and StPAP3 code for high-molecular weight PAPs typical for plants. Corresponding gene expression was shown to be responsive to the level of P supply, with transcripts of StPAP2 and StPAP3 being most abundant in P-deprived roots or both stem and roots, respectively. Root colonisation by arbuscular mycorrhizal fungi had no effect on the expression of any of the three PAP genes. StIPAP1 mRNA is easily detectable along the root axis, including root hairs, but is barely detectable in root tips. In contrast, both StPAP2 and StPAP3 transcripts are abundant along the root axis, but absent in root hairs, and are most abundant in the root tip. All three PAPs described contain a predicted N-terminal secretion signal and could play a role in extracellular P scavenging, P mobilisation from the rhizosphere, or cell wall regeneration
Y1  - 2004
SN  - 1435-8603
ER  - 
TY  - JOUR
A1  - Lloyd, James R.
A1  - Kossmann, Jens
A1  - Ritte, Gerhard
T1  - Leaf starch degradation comes out of the shadows
N2  - During the day, plants accumulate starch in their leaves as an energy source for the coming night. Based on recent findings, the prevailing view of how the transitory starch is remobilized needs considerable revision. Analyses of transgenic and mutant plants demonstrate that plastidic glucan phosphorylase is not required for normal starch breakdown and cast doubt on the presumed essential role of alpha-amylase but do show that beta-amylase is important. Repression of the activity of a plastidic beta-amylase, the export of its product (maltose) or further metabolism of maltose by a newly identified transglucosidase impairs starch degradation. Breakdown of particulate starch also depends on the activity of glucan-water dikinase, which phosphorylates glucosyl residues within the polymer
Y1  - 2005
ER  -