| 天目山毛竹叶冬季光合作用日变化规律 |
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| 引用本文： | 林琼影,胡剑,温国胜,邹武,李国会,杨守雷.天目山毛竹叶冬季光合作用日变化规律[J].福建林学院学报,2008,28(1):61-64. |
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| 作者姓名： | 林琼影 胡剑 温国胜 邹武 李国会 杨守雷 |
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| 作者单位： | 1. 浙江林学院林业与生物技术学院,浙江,临安,311300
2. 淳安县林业局,浙江,淳安,311722 |
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| 基金项目： | 教育部留学回国人员科研启动基金,浙江省科技厅重大科技专项重点基金,浙江省教育厅留学回国人员科研启动基金 |
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| 摘 要： | 为了探讨在冬季自然条件下毛竹叶片的气体交换特征,运用LI-6400光合作用测定仪测定了冬季毛竹叶片气体交换的日变化。结果表明:在冬季低温的自然条件下,毛竹叶片仍然具有一定的光合能力,表现出明显的日变化规律,净光合速率日变化呈"单峰"曲线,未出现光合"午休"现象,13:00左右出现高峰,峰值为1.973μmol.m-2.s-1,平均净光合速率较低,蒸腾速率和水分利用率的变化也呈"单峰"型。
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| 关 键 词： | 冬季 毛竹 气体交换 日变化 光合能力 |
| 文章编号： | 1001-389X(2008)01-0061-04 |
| 修稿时间： | 2007年8月13日 |
Diurnal variations of photosynthesis in leaves of Phyllostachys edulis in winter |
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| LIN Qiong-ying,HU Jian,WEN Guo-sheng,ZOU Wu,LI Guo-hui,YANG Shou-lei.Diurnal variations of photosynthesis in leaves of Phyllostachys edulis in winter[J].Journal of Fujian College of Forestry,2008,28(1):61-64. |
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| Authors: | LIN Qiong-ying HU Jian WEN Guo-sheng ZOU Wu LI Guo-hui YANG Shou-lei |
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| Abstract: | In order to investigate the characteristics of gas exchange in temporal scale,we measured the diurnal variations of photosynthesis of Phyllostachys edulis in winter with the Portable LI-6400 photosynthesis system.The results were summarized as follows: in winter,the leaves of P.edulis still have ability of photosynthesis,and it appears an obvious regulation.The diurnal curve of Pn has one peak,and there is no midday depression.the highest value appears(Pnmax=1.973 μmol·m-2·s-1) at 13:00 but the average value of Pn in a day is low.The transpiration rate and water use efficiency have one peak respectively.Under the condition of low temperature,this behavior provides necessary nutrient substances for the plant overwintering. |
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| Keywords: | winter Phyllostachys edulis gas exchange diurnal variation ability of photosynthesis |
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