NDLI: Function of the HD-Zip I gene Oshox22 in ABA-mediated drought and salt tolerances in rice

Content Provider	Springer Nature Link
Author	Zhang, Shuxin Haider, Imran Kohlen, Wouter Jiang, Li Bouwmeester, Harro Meijer, Annemarie H. Schluepmann, Henriette Liu, Chun Ming Ouwerkerk, Pieter B. F.
Copyright Year	2012
Abstract	Oshox22 belongs to the homeodomain-leucine zipper (HD-Zip) family I of transcription factors, most of which have unknown functions. Here we show that the expression of Oshox22 is strongly induced by salt stress, abscisic acid (ABA), and polyethylene glycol treatment (PEG), and weakly by cold stress. Trans-activation assays in yeast and transient expression analyses in rice protoplasts demonstrated that Oshox22 is able to bind the CAAT(G/C)ATTG element and acts as a transcriptional activator that requires both the HD and Zip domains. Rice plants homozygous for a T-DNA insertion in the promoter region of Oshox22 showed reduced Oshox22 expression and ABA content, decreased sensitivity to ABA, and enhanced tolerance to drought and salt stresses at the seedling stage. In contrast, transgenic rice over-expressing Oshox22 showed increased sensitivity to ABA, increased ABA content, and decreased drought and salt tolerances. Based on these results, we conclude that Oshox22 affects ABA biosynthesis and regulates drought and salt responses through ABA-mediated signal transduction pathways.
Starting Page	571
Ending Page	585
Page Count	15
File Format	PDF
ISSN	01674412
Journal	Plant Molecular Biology
Volume Number	80
Issue Number	6
e-ISSN	15735028
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-10-30
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rice Transcription factor HD-Zip Drought stress Regulation Abiotic stress Plant Pathology Plant Sciences Biochemistry
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Agronomy and Crop Science

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