Genetic interaction of two abscisic acid signaling regulators, HY5 and FIERY1, in mediating lateral root formation
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Desert Agriculture Initiative
Plant Stress Genomics Research Lab
Permanent link to this recordhttp://hdl.handle.net/10754/561699
MetadataShow full item record
AbstractRoot 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.
PublisherInforma UK Limited
JournalPlant Signaling & Behavior
- The bifunctional abiotic stress signalling regulator and endogenous RNA silencing suppressor FIERY1 is required for lateral root formation.
- Authors: Chen H, Xiong L
- Issue date: 2010 Dec
- RSM1, an Arabidopsis MYB protein, interacts with HY5/HYH to modulate seed germination and seedling development in response to abscisic acid and salinity.
- Authors: Yang B, Song Z, Li C, Jiang J, Zhou Y, Wang R, Wang Q, Ni C, Liang Q, Chen H, Fan LM
- Issue date: 2018 Dec
- A nucleotide metabolite controls stress-responsive gene expression and plant development.
- Authors: Chen H, Zhang B, Hicks LM, Xiong L
- Issue date: 2011
- CAM7 and HY5 genetically interact to regulate root growth and abscisic acid responses.
- Authors: Abbas N, Chattopadhyay S
- Issue date: 2014
- Opposite root growth phenotypes of hy5 versus hy5 hyh mutants correlate with increased constitutive auxin signaling.
- Authors: Sibout R, Sukumar P, Hettiarachchi C, Holm M, Muday GK, Hardtke CS
- Issue date: 2006 Nov 24