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    Genetic interaction of two abscisic acid signaling regulators, HY5 and FIERY1, in mediating lateral root formation

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    Type
    Article
    Authors
    Chen, Hao
    Xiong, Liming cc
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Bioscience Program
    Center for Desert Agriculture
    Plant Science
    Plant Stress Genomics Research Lab
    Date
    2014-10-28
    Online Publication Date
    2014-10-28
    Print Publication Date
    2011-01
    Permanent link to this record
    http://hdl.handle.net/10754/561699
    
    Metadata
    Show full item record
    Abstract
    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.6.1.14231
    Publisher
    Informa UK Limited
    Journal
    Plant Signaling & Behavior
    DOI
    10.4161/psb.6.1.14231
    PubMed ID
    21301222
    ae974a485f413a2113503eed53cd6c53
    10.4161/psb.6.1.14231
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Bioscience Program; Center for Desert Agriculture

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