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Author Du H., Chang Y., Huang F., Xiong L.
Title gid1 modulates stomatal response and submergence tolerance involving ABA and GA signaling in rice.
Plant responses to abiotic stresses are coordinated by arrays of growth and developmental programs. Gibberellic acid (GA) and abscisic acid (ABA) play critical roles in the developmental programs and environmental responses, respectively, through complex signaling and metabolism networks. However, crosstalk between the two phytohormones in stress responses remains largely unknown. In this study, we report that GIBBERELLIN-INSENSITIVE DWARF 1 (gid1), a soluble receptor for GA, regulates stomatal development and patterning in rice (Oryza sativa L.). The gid1 mutant showed impaired biosynthesis of endogenous ABA under drought stress condition, but it exhibited enhanced sensitivity to exogenous ABA. Scanning electron microscope and infrared thermal image analysis indicated an increase in the stomatal conductance in the gid1 mutant under drought condition. Interestingly, the gid1 mutant had increased levels of chlorophyll and carbohydrates under submergence condition, and showed enhanced ROS-scavenging ability and submergence tolerance compared with the wild-type. Further analyses suggested that the function of gid1 in submergence responses is partially dependent on ABA, and GA signaling by gid1 is involved in submergence tolerance by modulating carbohydrate consumption. Taken together, these findings suggest gid1 plays distinct roles in stomatal response and submergence tolerance through both the ABA and GA signaling pathways in rice.
Journal J Integr Plant Biol
Country China
Year 2014
PubMed ID 25418692
PubMed Central ID -
DOI 10.1111/jipb.12313
Gene CKX4 GID1 NCED1 NCED2 NCED3 _ _ _ _ _
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -