Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leaves
The effects of exogenous γ-glutamic acid (GABA) on photosynthetic gas exchange capacity, PSII function, proline (Pro) synthesis and ROS metabolism of tobacco leaves under cadmium (Cd) stress were studied. The results showed that both stomatal and non-stomatal factors were the important factors to li...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-01-01
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| Series: | Journal of Plant Interactions |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/17429145.2021.1944676 |
| _version_ | 1798033673326428160 |
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| author | Guoqiang He Hongbo Zhang Shiqi Liu Hengquan Li Yuze Huo Kaiwen Guo Zisong Xu Huihui Zhang |
| author_facet | Guoqiang He Hongbo Zhang Shiqi Liu Hengquan Li Yuze Huo Kaiwen Guo Zisong Xu Huihui Zhang |
| author_sort | Guoqiang He |
| collection | DOAJ |
| description | The effects of exogenous γ-glutamic acid (GABA) on photosynthetic gas exchange capacity, PSII function, proline (Pro) synthesis and ROS metabolism of tobacco leaves under cadmium (Cd) stress were studied. The results showed that both stomatal and non-stomatal factors were the important factors to limit the photosynthetic capacity of tobacco leaves under Cd stress. Pro accumulation and glutathione (GSH) content increase are the important ways for tobacco leaves to adapt to Cd stress. Exogenous GABA significantly increased the stability of oxygen-evolving complex (OEC) and the electron transfer rate of PSII in tobacco leaves under Cd stress, and increased Gs and Pn in varying degrees. Exogenous GABA also increased the expression of P5CS and P5CR genes in tobacco leaves under Cd stress, thus promoting Pro accumulation. In conclusion, 0.5 mmol·L−1 exogenous GABA can not only improve the carbon assimilation ability by increasing the Gs, but also alleviate the oxidative damage by promoting the synthesis and accumulation of Pro and GSH, and improve the stability of photosynthetic function of tobacco leaves under Cd stress. |
| first_indexed | 2024-04-11T20:33:51Z |
| format | Article |
| id | doaj.art-ef59adcc5efe40c48ef8df18c8a3d30c |
| institution | Directory Open Access Journal |
| issn | 1742-9145 1742-9153 |
| language | English |
| last_indexed | 2024-04-11T20:33:51Z |
| publishDate | 2021-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Plant Interactions |
| spelling | doaj.art-ef59adcc5efe40c48ef8df18c8a3d30c2022-12-22T04:04:26ZengTaylor & Francis GroupJournal of Plant Interactions1742-91451742-91532021-01-0116129630610.1080/17429145.2021.19446761944676Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leavesGuoqiang He0Hongbo Zhang1Shiqi Liu2Hengquan Li3Yuze Huo4Kaiwen Guo5Zisong Xu6Huihui Zhang7Northeast Forestry UniversityNortheast Forestry UniversityNortheast Agricultural UniversityMudanjiang Tobacco Science Research Institute, Mudanjiang, People’s Republic of ChinaNortheast Agricultural UniversityNortheast Agricultural UniversityNortheast Agricultural UniversityNortheast Forestry UniversityThe effects of exogenous γ-glutamic acid (GABA) on photosynthetic gas exchange capacity, PSII function, proline (Pro) synthesis and ROS metabolism of tobacco leaves under cadmium (Cd) stress were studied. The results showed that both stomatal and non-stomatal factors were the important factors to limit the photosynthetic capacity of tobacco leaves under Cd stress. Pro accumulation and glutathione (GSH) content increase are the important ways for tobacco leaves to adapt to Cd stress. Exogenous GABA significantly increased the stability of oxygen-evolving complex (OEC) and the electron transfer rate of PSII in tobacco leaves under Cd stress, and increased Gs and Pn in varying degrees. Exogenous GABA also increased the expression of P5CS and P5CR genes in tobacco leaves under Cd stress, thus promoting Pro accumulation. In conclusion, 0.5 mmol·L−1 exogenous GABA can not only improve the carbon assimilation ability by increasing the Gs, but also alleviate the oxidative damage by promoting the synthesis and accumulation of Pro and GSH, and improve the stability of photosynthetic function of tobacco leaves under Cd stress.http://dx.doi.org/10.1080/17429145.2021.1944676γ-glutamic acidcadmium stresstobaccophotosyntheticprolineglutataione |
| spellingShingle | Guoqiang He Hongbo Zhang Shiqi Liu Hengquan Li Yuze Huo Kaiwen Guo Zisong Xu Huihui Zhang Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leaves Journal of Plant Interactions γ-glutamic acid cadmium stress tobacco photosynthetic proline glutataione |
| title | Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leaves |
| title_full | Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leaves |
| title_fullStr | Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leaves |
| title_full_unstemmed | Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leaves |
| title_short | Exogenous γ-glutamic acid (GABA) induces proline and glutathione synthesis in alleviating Cd-induced photosynthetic inhibition and oxidative damage in tobacco leaves |
| title_sort | exogenous γ glutamic acid gaba induces proline and glutathione synthesis in alleviating cd induced photosynthetic inhibition and oxidative damage in tobacco leaves |
| topic | γ-glutamic acid cadmium stress tobacco photosynthetic proline glutataione |
| url | http://dx.doi.org/10.1080/17429145.2021.1944676 |
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