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Plasma membrane receptor-like kinase leaf panicle 2 acts downstream of the DROUGHT AND SALT TOLERANCE transcription factor to regulate drought sensitivity in rice
- Source :
- Journal of Experimental Botany
- Publication Year :
- 2014
- Publisher :
- Oxford University Press (OUP), 2014.
-
Abstract
- Highlight A leucine-rich repeat receptor-like kinase LP2 is transcriptionally controlled by zinc finger protein DST and serves as a negative regulator in drought response<br />Drought is a recurring climatic hazard that reduces the crop yields. To avoid the negative effects of drought on crop production, extensive efforts have been devoted to investigating the complex mechanisms of gene expression and signal transduction during drought stress. Receptor-like kinases (RLKs) play important roles in perceiving extracellular stimuli and activating downstream signalling responses. The rice genome contains >1100 RLK genes, of which only two are reported to function in drought stress. A leucine-rich repeat (LRR)-RLK gene named Leaf Panicle 2 (LP2) was previously found to be strongly expressed in leaves and other photosynthetic tissues, but its function remains unclear. In the present study, it was shown that the expression of LP2 was down-regulated by drought and abscisic acid (ABA). Transgenic plants overexpressing LP2 accumulated less H2O2, had more open stomata in leaves, and showed hypersensitivity to drought stress. Further investigation revealed that transcription of LP2 was directly regulated by the zinc finger transcription factor DROUGHT AND SALT TOLERANCE (DST). In addition, LP2 was identified as a functional kinase localized to the plasma membrane and interacted with the drought-responsive aquaporin proteins OsPIP1; 1, OsPIP1; 3, and OsPIP2; 3. Thus, the findings provided evidence that the LRR-RLK LP2, transcriptionally regulated by the drought-related transcription factor DST, served as a negative regulator in drought response.
- Subjects :
- Physiology
LRR
Adaptation, Biological
Aquaporin
Oryza sativa
Plant Science
Biology
RLK
water channel
chemistry.chemical_compound
Gene Expression Regulation, Plant
Transcription (biology)
Gene expression
Botany
Transcription factor
Abscisic acid
Phylogeny
Plant Proteins
Zinc finger transcription factor
Abiotic stress
fungi
food and beverages
Oryza
Plants, Genetically Modified
Droughts
Protein Structure, Tertiary
Cell biology
Plant Leaves
chemistry
Signal transduction
leaf panicle 2
Research Paper
Abscisic Acid
Transcription Factors
Subjects
Details
- ISSN :
- 14602431 and 00220957
- Volume :
- 66
- Database :
- OpenAIRE
- Journal :
- Journal of Experimental Botany
- Accession number :
- edsair.doi.dedup.....b137b0e20672140fbe01fec60758dd9c