Two homologous LHY pairs negatively control soybean drought tolerance by repressing the abscisic acid responses
| Autor: | Tong Su, Qun Cheng, Zhizhong Gong, Fanjiang Kong, Baohui Liu, Zimei Chen, Kai Wang, Lidong Dong, Tiantian Bu, Meina Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology Mutant Circadian clock Drought tolerance Cellular homeostasis Plant Science Biology 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Gene Expression Regulation Plant Arabidopsis Abscisic acid Plant Proteins Genetics Molecular breeding Abiotic stress fungi food and beverages biology.organism_classification Droughts DNA-Binding Proteins 030104 developmental biology chemistry Soybeans 010606 plant biology & botany Abscisic Acid Transcription Factors |
| Zdroj: | The New phytologistReferences. 229(5) |
| ISSN: | 1469-8137 |
| Popis: | The circadian clock plays essential roles in diverse plant biological processes, such as flowering, phytohormone biosynthesis and abiotic stress responses. The manner in which circadian clock genes regulate drought stress responses in model plants has been well established, but comparatively little is known in crop species, such as soybean, a major global crop. This paper reports that the core clock components GmLHYs, the orthologues of CCA1/LHY in Arabidopsis, negatively control drought tolerance in soybean. The expressions of four GmLHYs were all induced by drought, and the quadruple mutants of GmLHYs demonstrated significantly improved drought tolerance. Transcriptome profiling suggested that the abscisic acid (ABA) signaling pathway is regulated by GmLHYs to respond to drought tolerance. Genetic dissections showed that two homologous pairs of LHY1a and LHY1b redundantly control the drought response. Functional characterization of LHY1a and LHY1b in Arabidopsis and soybean further supported the notion that GmLHYs can maintain cellular homeostasis through the ABA signaling pathway under drought stress. This study improves our understanding of the underlying molecular mechanisms on soybean drought tolerance. Furthermore, the two homologues of LHY1a and LHY1b provide alternative targets for genome editing to rapidly generate mutant alleles in elite soybean cultivars to enhance their drought tolerance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text