TY  - GEN
A1  - Johnson, Kim L.
A1  - Ramm, Sascha
A1  - Kappel, Christian
A1  - Ward, Sally
A1  - Leyser, Ottoline
A1  - Sakamoto, Tomoaki
A1  - Kurata, Tetsuya
A1  - Bevan, Michael W.
A1  - Lenhard, Michael
T1  - The tinkerbell (tink) mutation identifies the dual-specificity MAPK phosphatase INDOLE- 3-BUTYRIC ACID-RESPONSE5 (IBR5) as a novel regulator of organ size in Arabidopsis
T2  - PLoS ONE
N2  - Mitogen-activated dual-specificity MAPK phosphatases are important negative regulators in the MAPK signalling pathways responsible for many essential processes in plants. In a screen for mutants with reduced organ size we have identified a mutation in the active site of the dual-specificity MAPK phosphatase INDOLE-3-BUTYRIC ACID-RESPONSE5 (IBR5) that we named tinkerbell (tink) due to its small size. Analysis of the tink mutant indicates that IBR5 acts as a novel regulator of organ size that changes the rate of growth in petals and leaves. Organ size and shape regulation by IBR5 acts independently of the KLU growth-regulatory pathway. Microarray analysis of tink/ibr5-6 mutants identified a likely role for this phosphatase in male gametophyte development. We show that IBR5 may influence the size and shape of petals through auxin and TCP growth regulatory pathways.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 427 
KW  - class-i
KW  - protein phosphatase
KW  - auxin
KW  - responses
KW  - thaliana
KW  - kinase
KW  - growth
KW  - interacts
KW  - distinct
KW  - pathway
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-410245
ER  - 
TY  - GEN
A1  - Siegmund, Jonatan Frederik
A1  - Wiedermann, Marc
A1  - Donges, Jonathan
A1  - Donner, Reik Volker
T1  - Impact of temperature and precipitation extremes on the flowering dates of four German wildlife shrub species
T2  - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Ongoing climate change is known to cause an increase in the frequency and amplitude of local temperature and precipitation extremes in many regions of the Earth. While gradual changes in the climatological conditions have already been shown to strongly influence plant flowering dates, the question arises if and how extremes specifically impact the timing of this important phenological phase. Studying this question calls for the application of statistical methods that are tailored to the specific properties of event time series. Here, we employ event coincidence analysis, a novel statistical tool that allows assessing whether or not two types of events exhibit similar sequences of occurrences in order to systematically quantify simultaneities between meteorological extremes and the timing of the flowering of four shrub species across Germany. Our study confirms previous findings of experimental studies by highlighting the impact of early spring temperatures on the flowering of the investigated plants. However, previous studies solely based on correlation analysis do not allow deriving explicit estimates of the strength of such interdependencies without further assumptions, a gap that is closed by our analysis. In addition to direct impacts of extremely warm and cold spring temperatures, our analysis reveals statistically significant indications of an influence of temperature extremes in the autumn preceding the flowering.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 497 
KW  - event coincidence analysis
KW  - climate-change
KW  - weather extremes
KW  - plant phenology
KW  - interannual variability
KW  - air-temperature
KW  - responses
KW  - drought
KW  - trends
KW  - summer
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-408352
SN  - 1866-8372
IS  - 497
ER  - 
TY  - GEN
A1  - Lämke, Jörn
A1  - Bäurle, Isabel
T1  - Epigenetic and chromatin-based mechanisms in environmental stress adaptation and stress memory in plants
T2  - Postprints der Universität Potsdam Mathematisch-Naturwissenschaftliche Reihe
N2  - Plants frequently have to weather both biotic and abiotic stressors, and have evolved sophisticated adaptation and defense mechanisms. In recent years, chromatin modifications, nucleosome positioning, and DNA methylation have been recognized as important components in these adaptations. Given their potential epigenetic nature, such modifications may provide a mechanistic basis for a stress memory, enabling plants to respond more efficiently to recurring stress or even to prepare their offspring for potential future assaults. In this review, we discuss both the involvement of chromatin in stress responses and the current evidence on somatic, intergenerational, and transgenerational stress memory.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 792 
KW  - remodeling atpase brahma
KW  - transcriptional memory
KW  - DNA methylation
KW  - transgenerational inheritance
KW  - acquired thermotolerance
KW  - Arabidopsis-thaliana
KW  - gene-expression
KW  - responses
KW  - protein
KW  - defense
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-436236
SN  - 1866-8372
IS  - 792
ER  -