Genetic interaction of two abscisic acid signaling regulators, HY5 and FIERY1, in mediating lateral root formation
Type
ArticleAuthors
Chen, HaoXiong, Liming

KAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionBioscience Program
Center for Desert Agriculture
Plant Science
Plant Stress Genomics Research Lab
Date
2014-10-28Online Publication Date
2014-10-28Print Publication Date
2011-01Permanent link to this record
http://hdl.handle.net/10754/561699
Metadata
Show full item recordAbstract
Root architecture is continuously shaped in a manner that helps plants to better adapt to the environment. Gene regulation at the transcriptional or post-transcriptional levels largely controls this environmental response. Recently, RNA silencing has emerged as an important player in gene regulation and is involved in many aspects of plant development, including lateral root formation. In a recent study, we found that FIERY1, a bifunctional abiotic stress and abscisic acid (ABA) signaling regulator and an endogenous RNA silencing suppressor, mediates auxin response during lateral root formation in Arabidopsis. We proposed that FRY1 regulates lateral root development through its activity on adenosine 3,5-bisphosphate (PAP), a strong inhibitor of exoribonucleases (XRNs). Interestingly, some of the phenotypes of fry1, such as enhanced response to light in repressing hypocotyl elongation and hypersensitivity to ABA in lateral root growth, are opposite to those of another light- and ABA-signaling mutant, hy5. Here we analyzed the hy5 fry1 double mutant for root and hypocotyl growth. We found that the hy5 mutation can suppress the enhanced light sensitivity in fry1 hypocotyl elongation and restore the lateral root formation. The genetic interaction between HY5 and FRY1 indicates that HY5 and FRY1 may act in overlapping pathways that mediate light signaling and lateral root development. © 2011 Landes Bioscience.Citation
Chen, H., & Xiong, L. (2011). Genetic interaction of two abscisic acid signaling regulators, HY5 and FIERY1, in mediating lateral root formation. Plant Signaling & Behavior, 6(1), 123–125. doi:10.4161/psb.6.1.14231Publisher
Informa UK LimitedJournal
Plant Signaling & BehaviorPubMed ID
21301222ae974a485f413a2113503eed53cd6c53
10.4161/psb.6.1.14231
Scopus Count
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