| 盐碱地马蔺光合生理特性的研究 |
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| 引用本文： | 孙广玉,蔡淑燕,胡彦波,樊传辉.盐碱地马蔺光合生理特性的研究[J].植物研究,2006,26(1):74-78. |
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| 作者姓名： | 孙广玉 蔡淑燕 胡彦波 樊传辉 |
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| 作者单位： | 东北林业大学生命科学学院,哈尔滨,150040 |
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| 基金项目： | 黑龙江省科技攻关项目;黑龙江省科技攻关项目;黑龙江省哈尔滨市科研项目 |
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| 摘 要： | 研究了盐碱地生长的马蔺叶片净光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）和水分利用效率（WUE）以及环境因素的日变化。结果表明，马蔺叶片Pn和Tr均呈现双峰曲线，具有光合午休现象。这种现象出现的原因是由于较高的太阳辐射引起叶片温度的升高，叶片的羧化效率(CE)和表观量子产额(AQY)的下降造成的。
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| 关 键 词： | 马蔺 净光合速率 水分利用效率 羧化效率 表观量子产额 |
| 收稿时间： | 2005-04-22 |
| 修稿时间： | 2005年4月22日 |
Physiological characteristics of photosynthesis in Iris lactea Pall.var. Chinensis (Fisch.) Koidz grown in salt and alkali soil |
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| SUN Guang-Yu,CAI Shu-Yan,HU Yan-Bo,FAN Chuan-Hui.Physiological characteristics of photosynthesis in Iris lactea Pall.var. Chinensis (Fisch.) Koidz grown in salt and alkali soil[J].Bulletin of Botanical Research,2006,26(1):74-78. |
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| Authors: | SUN Guang-Yu CAI Shu-Yan HU Yan-Bo FAN Chuan-Hui |
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| Institution: | College of Life Science, Northeast Forest University, Harbin 150040 |
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| Abstract: | The experiment was conducted to determine diurnal changes of net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),water use efficiency(WUE),and environmental factors in Iris lactea Pall.var.chinensis(Fisch.) Koidz grown in salt-alkali soil.The data acquired in this study showed that diurnal changes of Pn and Tr were two-peak-type-curve and were marked by a midday depression of Pn,which could be fully accounted for by Gs changes.Carboxylic efficiency(CE),photosynthetic rate at saturation for intercellular CO_2 concentration(A_(350)),apparent quantum yield(AQY),and photosynthetic rate at light saturation(Pmax) all decreased at midday.The results indicated that the midday depression could be attributed to the rising leaf temperature caused by increased strong solar radiation(PAR). |
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| Keywords: | Iris lactea Pall var chinensis(Fisch ) Koidz net photosynthetic rate water use efficiency carboxylic efficiency apparent quantum yield |
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