Transcription factor WRKY46 regulates osmotic stress responses and stomatal movement tissue specifically and independently in Arabidopsis

ABSTRACT: Drought and salt stress severely inhibit plant growth and development. However, the regulatory mechanisms of plants in response to these stresses are not fully understood. Here we find that the expression of a WRKY transcription factor WRKY46 is rapidly induced by drought, salt and oxidative stresses. Mutations of WRKY46 by T-DNA insertion lead to more sensitive to drought and salt stress, whereas, overexpression of WRKY46 exhibits hypersensitive in soil culture with higher water loss rate, but increased tolerance on the agar plates. ABA induced stomatal closing is impaired in the WRKY46 overexpressing line (OV46), which is potentially due to the lower ROS accumulation in the guard cells. Real-time qPCR and GUS activity assay further demonstrate that WRKY46 is expressed in guard cells, but

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Shao Jian Zheng 

PROVIDER: E-GEOD-49418 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress