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- Title
Changes in physiological responses of OsCaM1-1 overexpression in the transgenic rice under dehydration stress.
- Authors
Pun Sangchai; Teerapong Buaboocha; Sirikantaramas, Supaart; Nuchanat Wutipraditkul
- Abstract
Calmodulin, a primary calcium sensor in eukaryotes, binds calcium and regulates the activity of effector proteins in response to calcium signals that evoked in response to abiotic and biotic stress. To identify physiological responses associated with improved tolerance under dehydration stress that may be regulated by calmodulin in rice, the transgenic rice overexpressing OsCaM1-1, the control, and the wild-type KDML105 differing in their dehydration tolerance were compared 24 h after exposure to dehydration stress. The results demonstrated a greater increase in relative water content, relative growth rate, abscisic acid, photosynthetic pigment and proline contents, and antioxidant activities in the transgenic rice plants, whereas Na/K and Na/Ca ratio, lipid peroxidation, and electrolytic leakage decreased. The OsCaM1-1 gene overexpression in the transgenic rice showed greater tolerance to dehydration stress than non-transgenic rice, suggesting that OsCaM1-1 might play an important role in mitigating dehydration stress.
- Subjects
TRANSGENIC rice; DEHYDRATION; GENETIC overexpression; CALMODULIN; PHOTOSYNTHETIC pigments; ABSCISIC acid; PLANT pigments
- Publication
Bioscience, Biotechnology & Biochemistry, 2022, Vol 86, Issue 9, p1211
- ISSN
0916-8451
- Publication type
Article
- DOI
10.1093/bbb/zbac115