Title : Arabidopsis RAV1 transcription factor, phosphorylated by SnRK2 kinases, regulates the expression of ABI3, ABI4, and ABI5 during seed germination and early seedling development.

Pub. Date : 2014 Nov

PMID : 25231920






7 Functional Relationships(s)
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1 In this study, the molecular mechanism of Arabidopsis RAV (Related to ABI3/VP1) transcription factor RAV1 involving ABA signaling was investigated. Abscisic Acid related to ABI3/VP1 1 Arabidopsis thaliana
2 RAV1-underexpressing lines were more sensitive to ABA than wild-type plants during seed germination and early seedling development, whereas RAV1-overexpressing lines showed strong ABA-insensitive phenotypes. Abscisic Acid related to ABI3/VP1 1 Arabidopsis thaliana
3 RAV1-underexpressing lines were more sensitive to ABA than wild-type plants during seed germination and early seedling development, whereas RAV1-overexpressing lines showed strong ABA-insensitive phenotypes. Abscisic Acid related to ABI3/VP1 1 Arabidopsis thaliana
4 The interruption of ABI5 function in RAV1-U abi5 plants abolished the ABA-hypersensitive phenotype of RAV1-U plants, demonstrating that ABI5 is epistatic to RAV1. Abscisic Acid related to ABI3/VP1 1 Arabidopsis thaliana
5 The interruption of ABI5 function in RAV1-U abi5 plants abolished the ABA-hypersensitive phenotype of RAV1-U plants, demonstrating that ABI5 is epistatic to RAV1. Abscisic Acid related to ABI3/VP1 1 Arabidopsis thaliana
6 The interruption of ABI5 function in RAV1-U abi5 plants abolished the ABA-hypersensitive phenotype of RAV1-U plants, demonstrating that ABI5 is epistatic to RAV1. Abscisic Acid related to ABI3/VP1 1 Arabidopsis thaliana
7 Together, these results demonstrated that the Arabidopsis RAV1 transcription factor plays an important role in ABA signaling by modulating the expression of ABI3, ABI4, and ABI5, and that its activity is negatively affected by SnRK2s. Abscisic Acid related to ABI3/VP1 1 Arabidopsis thaliana