| 不同密度和不同水分状况下春小麦光合初探 |
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| 引用本文： | 侯宗东,王根轩.不同密度和不同水分状况下春小麦光合初探[J].中国沙漠,2001,21(3):236-239. |
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| 作者姓名： | 侯宗东 王根轩 |
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| 作者单位： | 1. 兰州大学干旱农业生态国家重点实验室, 甘肃兰州 730000;2. 中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 甘肃兰州 730000 |
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| 基金项目： | 国家重点基础研究专项(G1999011705);中国科学院沙坡头沙漠实验站研究基金资助 |
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| 摘 要： | 利用CIRAS 1PP系统光合仪测定了不同密度和不同水分处理下的转基因春小麦新品系3号和耐盐8号的净光合速率(Pn),蒸腾(E),气孔导度(Gs)和胞间CO2浓度(CO2.in),结果表明:①水分亏缺可以突出密度效应;②不同品种对密度效应的响应不同,新品系3号比耐盐8号的密度效应更加明显一些;③高密度下单叶片净光合速率值的降低将是最终造成单株生物量改变的主要原因。
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| 关 键 词： | 春小麦 密度 水分 净光合速率 |
| 文章编号： | 1000-694(2001)03-0236-04 |
| 收稿时间： | 2000-12-15 |
| 修稿时间： | 2000年12月15 |
Elementary Study on Net Photosynthetic Rate of Spring Wheat under Different
Densities and Soil Water Status |
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| HOU Zong-dong ,WANG Gen-xuan.Elementary Study on Net Photosynthetic Rate of Spring Wheat under Different
Densities and Soil Water Status[J].Journal of Desert Research,2001,21(3):236-239. |
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| Authors: | HOU Zong-dong WANG Gen-xuan |
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| Institution: | 1. State Key Laboratory of Arid Agroecology of Lanzhou University, Lanzhou 730000, China;2. Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China |
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| Abstract: | The net photosynthetic rate (Pn), transpiration (E), stomatal conductivity (Gs) and intercellular CO2 concentration (CO2.in) were measured in transgene spring wheat under different densities and soil water status by photosynthetic instrument of CIRAS1 PP system. The results demonstrated: ① Water stress could strengthen density effect; ②Density effect was different between transgene cultivars; ③The key reason of plant biomass decrease in high density was that the net photosynthetic rate dropped in spring wheat. |
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| Keywords: | transgene spring wheat density water net photosynthet ic rate |
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