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A ras-related small GTP-binding protein, RabE1c, regulates stomatal movements and drought stress responses by mediating the interaction with ABA receptors
- Source :
- Plant science : an international journal of experimental plant biology. 306
- Publication Year :
- 2020
-
Abstract
- Drought represents a leading constraint over crop productivity worldwide. The plant response to this stress is centered on the behavior of the cell membrane, where the transduction of abscisic acid (ABA) signaling occurs. Here, the Ras-related small GTP-binding protein RabE1c has been shown able to bind to an ABA receptor in the Arabidopsis thaliana plasma membrane, thereby positively regulating ABA signaling. RabE1c is highly induced by drought stress and expressed abundantly in guard cells. In the loss-of-function rabe1c mutant, both stomatal closure and the whole plant drought stress response showed a reduced sensitivity to ABA treatment, demonstrating that RabE1c is involved in the control over transpirative water loss through the stomata. Impairment of RabE1c's function suppressed the accumulation of the ABA receptor PYL4. The over-expression of RabE1c in A. thaliana enhanced the plants' ability to tolerate drought, and a similar phenotypic effect was achieved by constitutively expressing the gene in Chinese cabbage (Brassica rapassp. pekinensis). The leading conclusion was that RabE1c promotes the degradation of PYL4, suggesting a possible genetic strategy to engineer crop plants to better withstand drought stress.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Crops, Agricultural
Mutant
Arabidopsis
Plant Science
Biology
01 natural sciences
Cell membrane
03 medical and health sciences
chemistry.chemical_compound
Transduction (genetics)
GTP-Binding Proteins
Gene Expression Regulation, Plant
Stress, Physiological
Guard cell
Genetics
medicine
Arabidopsis thaliana
Receptor
Abscisic acid
Gene
Arabidopsis Proteins
fungi
food and beverages
General Medicine
biology.organism_classification
Plants, Genetically Modified
Cell biology
Droughts
030104 developmental biology
medicine.anatomical_structure
chemistry
Plant Stomata
Agronomy and Crop Science
010606 plant biology & botany
Abscisic Acid
Signal Transduction
Subjects
Details
- ISSN :
- 18732259
- Volume :
- 306
- Database :
- OpenAIRE
- Journal :
- Plant science : an international journal of experimental plant biology
- Accession number :
- edsair.doi.dedup.....de1748fe6adee4aa587f3257ac2450c6