| 不同秋眠级苜蓿越冬前后叶片光合作用的比较研究 |
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| 引用本文： | 张浩阳,刘美君,卫丹丹,苗宇,张丽佳.不同秋眠级苜蓿越冬前后叶片光合作用的比较研究[J].草地学报,2022,30(4):983-991. |
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| 作者姓名： | 张浩阳 刘美君 卫丹丹 苗宇 张丽佳 |
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| 作者单位： | 1. 新疆农业大学草业学院, 新疆草地资源与生态实验室, 新疆 乌鲁木齐 8320052;2. 忻州师范学院, 山西 忻州 034000 |
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| 基金项目： | 现代农业产业技术体系;国家自然科学基金;新疆维吾尔自治区天山英才第三期培养计划 |
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| 摘 要： | 本文通过对苜蓿叶片光系统活性、光合速率及气孔的测定,研究了越冬前后不同秋眠级苜蓿光合作用的变化,探讨苜蓿秋眠级与抗寒性之间的关系,为苜蓿抗寒品种的选育提供理论基础.结果表明,苜蓿叶片的光合性能指数和最大光化学效率的日变化趋势均呈U型,且两品种间无显著性差异.这表明苜蓿叶片光系统Ⅱ在中午产生光抑制,下午随着光强的减弱光抑...
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| 关 键 词： | 秋眠级 苜蓿 光合作用 光系统活性 光合性能指数 |
| 收稿时间： | 2021-07-07 |
Comparative Study on Leaf Photosynthetic Activity of Different Fall Dormancy Alfalfa Before and After Winter |
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| ZHANG Hao-yang,LIU Mei-jun,WEI dan-dan,MIAO Yu,ZHANG Li-jia.Comparative Study on Leaf Photosynthetic Activity of Different Fall Dormancy Alfalfa Before and After Winter[J].Acta Agrestia Sinica,2022,30(4):983-991. |
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| Authors: | ZHANG Hao-yang LIU Mei-jun WEI dan-dan MIAO Yu ZHANG Li-jia |
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| Institution: | 1. College of Grassland Science, Xinjiang Agricultural University, Key laboratory of Grassland Resources and Ecology of Xinjiang, Urumqi, Xinjiang 830052, China;2. Xinzhou Normal University, Xinzhou, Shanxi Province 034000, China |
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| Abstract: | The photosynthetic activity,photosynthetic rate and stomata of alfalfa leaves were measured to study the change of photosynthesis of different fall dormancy alfalfa before and after winter.The relationship between alfalfa fall dormancy rating and cold resistance was explored to provide a theoretical basis for the selection and breeding of cold resistant alfalfa variety.The results showed that the photosynthetic performance index and maximum photochemical efficiency of alfalfa with different fall dormancy showed a U-shaped trend of daily changes,and there was no significant difference between the two cultivars.The results indicated that the activity of photosystem Ⅱ in alfalfa leaves reached a stable value after nighttime adaptation,and photoinhibition was produced at noon due to strong light irradiation of photosystem Ⅱ,and photosynthetic activity gradually recovered in the afternoon as the light intensity decreased and the degree of photoinhibition decreased.The photosynthetic rate of alfalfa leaves showed a three-peaked curve trend of daily variation.The stomata structure of alfalfa leaf with different fall dormancies had no significant difference before winter,while the stomata shrank and narrowed during the winter.The changes of Jungar alfalfa were more significant,the stomata gradually recovered after the winter and the stomata of Jungar alfalfa recovered faster.The results indicates that the lower fall dormancy alfalfa recovered faster in stomatal structure and photosynthesis after winter with low temperature,and therefore has stronger resistance to low temperature. |
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| Keywords: | Fall dormancy level Alfalfa Photosynthesis Photosynthetic body activity Photosynthetic performance index |
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