TY  - JOUR
A1  - Müller-Röber, Bernd
A1  - Balazadeh, Salma
T1  - Auxin and its role in plant senescence
T2  - Journal of plant growth regulation
N2  - Leaf senescence represents a key developmental process through which resources trapped in the photosynthetic organ are degraded in an organized manner and transported away to sustain the growth of other organs including newly forming leaves, roots, seeds, and fruits. The optimal timing of the initiation and progression of senescence are thus prerequisites for controlled plant growth, biomass accumulation, and evolutionary success through seed dispersal. Recent research has uncovered a multitude of regulatory factors including transcription factors, micro-RNAs, protein kinases, and others that constitute the molecular networks that regulate senescence in plants. The timing of senescence is affected by environmental conditions and abiotic or biotic stresses typically trigger a faster senescence. Various phytohormones, including for example ethylene, abscisic acid, and salicylic acid, promote senescence, whereas cytokinins delay it. Recently, several reports have indicated an involvement of auxin in the control of senescence, however, its mode of action and point of interference with senescence control mechanisms remain vaguely defined at present and contrasting observations regarding the effect of auxin on senescence have so far hindered the establishment of a coherent model. Here, we summarize recent studies on auxin-related genes that affect senescence in plants and highlight how these findings might be integrated into current molecular-regulatory models of senescence.
KW  - ARF
KW  - Auxin
KW  - Chloroplast
KW  - Development
KW  - Leaf
KW  - SAUR
KW  - Senescence
KW  - Signaling
KW  - Transcription factor
KW  - YUCCA
Y1  - 2014
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38033
SN  - 0721-7595
SN  - 1435-8107
VL  - 33
IS  - 1
SP  - 21
EP  - 33
PB  - Springer
CY  - New York
ER  -