| Effects of drought and salt stresses on growth and physiological characteristics of Gentiana straminea seedlings from different provenances |
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| DOI：10.7606/j.issn.1000-7601.2020.06.07 |
| Key Words: Gentiana straminea drought stress salt stress geographical provenance physiological characteristics |
| Author Name | Affiliation | | CHENG Tingfeng | Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China
University of Chinese Academy of Sciences, Beijing 100049, China | | WANG Huan | Analysis and Testing Center, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China | | CHEN Shilong | Key Laboratory of Crop Molecular Breeding of Qinghai Province, Xining, Qinghai 810008, China
Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China
| | WANG Jiuli | College of Ecological Environment and Resources, Qinghai Nationalities University, Xining, Qinghai 810007,China | | SHI Shengbo | Key Laboratory of Crop Molecular Breeding of Qinghai Province, Xining, Qinghai 810008, China
Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China
| | SHEN Jianwei | Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China
Key Laboratory of Crop Molecular Breeding of Qinghai Province, Xining, Qinghai 810008, China | | ZHOU Dangwei | Key Laboratory of Crop Molecular Breeding of Qinghai Province, Xining, Qinghai 810008, China
Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China
University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: |
| Seedlings of Gentiana straminea from five geographical provenances of Qinghai Province (Haibeizhan, Delingha, Hebeixiang, Xiazangke, and Banmaxian) were used as research materials to investigate growth and physiological characteristics of G. straminea under drought stress, salt stress, and mixed stress. The results showed that the growth of G. straminea was significantly inhibited under stress but impacts were different in different areas. The height of seedlings in Delingha area was the highest under drought stress, 2.36 cm, and the highest in Hebeixiang area under salt stress and mixed stress, 2.49 cm and 2.28 cm, respectively. The physiological characteristics also had certain differences. Only under drought stress, the MDA content of seedlings in Delingha area decreased by 69.07%, and the soluble protein increased by 46.52%; under simple drought stress, the POD and CAT activities of seedlings in Haibeizhan area increased by 234.39% and 86.39%, respectively; under the simple salt stress treatment, the POD and CAT activities of seedlings in Haibeizhan increased by 340.53% and 127.86%, respectively. The SOD and CAT of seedlings in Delingha area also increased by 6.44% and 51.20%, respectively, under mixed stress. From a comprehensive evaluation using membership function method, the drought resistance of G. straminea ranked as follow: Delingha > Haibeizhan > Xiazangke >Hebeixiang > Banmaxian; salt tolerance: Haibeizhan > Xiazangke > Delingha > Banmaxian > Hebeixiang; mixed stress resistance: Delingha > Xiazangke > Haibeizhan > Haibeixiang > Banmaxian. The results showed that different geographical provenances of G. straminea had some differences in response to stress, and G. straminea in Delingha and Haibeizhan areas were more tolerant to stress, presumably related to the long\|term growth of the natural environment. |
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