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Isolation and characterization of dehydration-responsive element-binding factor 2C (MsDREB2C) from Malus sieversii
Kai Zhao1, Xinjie Shen, Huazhao Yuan
1Department of Fruit Science, College of Agriculture and Biotechnology/Key Laboratory of Stress Physiology and Molecular Biology for Tree Fruits of Beijing, China Agricultural University, 2 Yuanmingyuan West Road, Haidian District, Beijing 100193, PR China.
This study identifies a key plant gene, MsDREB2C, that enhances tolerance to drought, heat, and cold stress by regulating downstream genes. However, it also increases susceptibility to bacterial infection.
Area of Science:
- Plant Molecular Biology
- Plant Physiology
- Biochemistry
Background:
- Dehydration-responsive element-binding factor 2 (DREB2)-type transcription factors are crucial for plant stress responses.
- Understanding these factors is vital for improving crop resilience in changing environmental conditions.
Purpose of the Study:
- To isolate and characterize a novel DREB2 homolog from Malus sieversii Roem., named MsDREB2C.
- To investigate the role of MsDREB2C in abiotic stress tolerance and its regulatory mechanisms.
Main Methods:
- Gene isolation and characterization of MsDREB2C.
- Localization studies in yeast and quantitative real-time PCR for gene expression analysis.
- Generation and analysis of transgenic Arabidopsis and tobacco plants overexpressing MsDREB2C.
Main Results:
- MsDREB2C is localized in the nucleus and activated reporter genes.
- MsDREB2C expression is induced by drought, salt, cold, heat, and ABA.
- Overexpression of MsDREB2C enhances tolerance to abiotic stresses but increases susceptibility to Pst DC3000.
- Promoter analysis revealed specific regulatory regions responsive to various stresses.
Conclusions:
- MsDREB2C plays a significant role in plant abiotic stress tolerance.
- MsDREB2C exhibits a trade-off between abiotic stress tolerance and disease resistance.
- The identified regulatory regions provide insights into the transcriptional control of MsDREB2C.
