Plants · 2022 · 42 citations · 19 references
Life SciencesPlant BiologyPlant SciencesGene ExpressionPlant Molecular BiologyTranscriptional RegulationAbiotic Stress ToleranceDrought PhysiologyDrought Stress PhysiologyDrought TolerancePlant Gene ExpressionPlant Transcriptional RegulationAbiotic StressDrought StressDrought Stress ResponsesDrought-induced Stomatal ClosurePlant Drought TolerancePlant Stress ResponsesPlant Stress ToleranceWrky Transcription Factors
The WRKY family of transcription factors plays a pivotal role in plant responses to biotic and abiotic stress. The WRKY Group III transcription factor OsWRKY114 is a positive regulator of innate immunity against Xanthomonas oryzae pv. oryzae; however, its role in abiotic stress responses is largely unknown. In this study, we showed that the abundant OsWRKY114 transcripts present in transgenic rice plants are reduced under drought conditions. The overexpression of OsWRKY114 significantly increased drought sensitivity in rice, which resulted in a lower survival rate after drought stress. Moreover, we showed that stomatal closure, which is a strategy to save water under drought, is restricted in OsWRKY114-overexpressing plants compared with wild-type plants. The expression levels of PYR/PYL/RCAR genes, such as OsPYL2 and OsPYL10 that confer drought tolerance through stomatal closure, were also markedly lower in the OsWRKY114-overexpressing plants. Taken together, these results suggest that OsWRKY114 negatively regulates plant tolerance to drought stress via inhibition of stomatal closure, which would otherwise prevent water loss in rice.
19
Rice WRKY45 Plays a Crucial Role in Benzothiadiazole-Inducible Blast Resistance
Masaki Shimono, Shoji Sugano, Akira Nakayama et al. · The Plant Cell · 2007 · 647 citations · Full text