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2018 ; 9
(ä): 416
Nephropedia Template TP
gab.com Text
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English Wikipedia
Abscisic Acid and Gibberellins Antagonistically Mediate Plant Development and
Abiotic Stress Responses
#MMPMID29636768
Shu K
; Zhou W
; Chen F
; Luo X
; Yang W
Front Plant Sci
2018[]; 9
(ä): 416
PMID29636768
show ga
Phytohormones regulate numerous important biological processes in plant
development and biotic/abiotic stress response cascades. More than 50 and 100
years have passed since the initial discoveries of the phytohormones abscisic
acid (ABA) and gibberellins (GA), respectively. Over the past several decades,
numerous elegant studies have demonstrated that ABA and GA antagonistically
regulate many plant developmental processes, including seed maturation, seed
dormancy and germination, root initiation, hypocotyl and stem elongation, and
floral transition. Furthermore, as a well-established stress hormone, ABA plays a
key role in plant responses to abiotic stresses, such as drought, flooding,
salinity and low temperature. Interestingly, recent evidence revealed that GA are
also involved in plant response to adverse environmental conditions.
Consequently, the complex crosstalk networks between ABA and GA, mediated by
diverse key regulators, have been extensively investigated and documented. In
this updated mini-review, we summarize the most recent advances in our
understanding of the antagonistically regulatory roles of ABA and GA in different
stages of plant development and in various plant-environment interactions,
focusing on the crosstalk between ABA and GA at the levels of phytohormone
metabolism and signal transduction.