| Effect of artificially accelerated aging on the vigor of Metasequoia glyptostroboides seeds |
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| 作者姓名： | Huan Liu Yanfang Zhu Xia Liu Yu Jiang Shiming Deng Xunru Ai Zhijun Deng |
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| 作者单位： | College of Forestry and Horticulture;Tibet University;Wuhan Botanical Garden;Beijing Forestry University |
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| 基金项目： | supported by the Research Project of Hubei Provincial Department of Education(Q20141902)。 |
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| 摘 要： | Metasequoia glyptostroboides is an endangered relict plant native to China that has been widely introduced into many countries and areas around the world. However,its seeds germinate at a very low percentage. Consequently,population regeneration by seed is low under natural conditions, which probably contributes to the endangered status of this plant species. The present study aimed to describe the aging mechanism of M. glyptostroboides seeds. Our objective was to elucidate causes of the low germination rate in an effort to enhance potential for conservation of the species. We used germination tests,relative electrical conductivity and malondialdehyde content determination, ultrastructural observation of embryo cells, and analysis of superoxide dismutase, catalase,ascorbate peroxidase, and dehydroascorbate reductase activities during accelerated aging treatment. We found that M. glyptostroboides seeds have a low level of vigorand poor ability to maintain vigor, which is probably associated with the inefficiency of its enzymatic antioxidative system.
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| 关 键 词： | DAWN redwood SEED aging Relative electrical conductivity ANTIOXIDATIVE system ULTRASTRUCTURE |
Effect of artificially accelerated aging on the vigor of Metasequoia glyptostroboides seeds |
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| Huan Liu,Yanfang Zhu,Xia Liu,Yu Jiang,Shiming Deng,Xunru Ai,Zhijun Deng.Effect of artificially accelerated aging on the vigor of Metasequoia glyptostroboides seeds[J].Journal of Forestry Research,2020,31(3):769-779. |
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| Institution: | College of Forestry and Horticulture, Hubei University forNationalities, Enshi 445000, People's Republic of China;Tibet University, Lhasa 850000, Tibet Autonomous Region, People's Republic of China;Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei Province, People's Republic of China;Beijing Forestry University, Beijing 100083, People's Republic of China |
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| Abstract: | Metasequoia glyptostroboides is an endangered relict plant native to China that has been widely introduced into many countries and areas around the world. However,its seeds germinate at a very low percentage. Consequently,population regeneration by seed is low under natural conditions, which probably contributes to the endangered status of this plant species. The present study aimed to describe the aging mechanism of M. glyptostroboides seeds. Our objective was to elucidate causes of the low germination rate in an effort to enhance potential for conservation of the species. We used germination tests,relative electrical conductivity and malondialdehyde content determination, ultrastructural observation of embryo cells, and analysis of superoxide dismutase, catalase,ascorbate peroxidase, and dehydroascorbate reductase activities during accelerated aging treatment. We found that M. glyptostroboides seeds have a low level of vigorand poor ability to maintain vigor, which is probably associated with the inefficiency of its enzymatic antioxidative system. |
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