| 温度对大叶桃花心木(Swietenia macrophylla King)幼苗叶片的光合影响 |
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| 引用本文： | 张成军,祖元刚,郭佳秋. 温度对大叶桃花心木(Swietenia macrophylla King)幼苗叶片的光合影响[J]. 林业研究, 2003, 14(2): 130-134. DOI: 10.1007/BF02856779 |
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| 作者姓名： | 张成军 祖元刚 郭佳秋 |
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| 作者单位： | 张成军,祖元刚,ZHANG Cheng-jun,ZU Yuan-Gang(东北林业大学森林植物生态学教育部重点实验室,哈尔滨,150040,中国);Carlos Henrique B.de A.Prado,Carlos Cesar Ronquim,Leonnardo Lopes Ferreira,Carlos Henrique B.de A.Prado,Carlos Cesar Ronquim,Leonnardo Lopes Ferreira(Laboratory of Plant Physiology, Department of Botany, Federal University of Sao Carlos, SP, 13565-905, Brazil);郭佳秋,GUO Jia-Qiu(哈尔滨医科大学第二附属医院,哈尔滨,150086,中国) |
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| 摘 要： | 本文研究了大叶桃花心木（Swietenia macrophylla King）一年生幼苗在经过夜温处理后的光响应曲线和在饱和光强下的CO2反应曲线.结果表明:在大气CO2浓度下,叶片的最佳光合作用温度在25-31℃之间,而在饱和CO2浓度下为31-35℃.在25℃以下光合速率开始降低,主要是由于羧化效率的降低,而当温度超过31℃时,光合速率下降,是因为羧化效率的降低和呼吸速率的增加.CO2浓度对光合的促进作用在低温下受到抑制,这意味着未来在CO2浓度增高的情况下,高浓度的CO2对热带常绿植物光合的促进在冬天低温情况下表现不十分明显.图4参23.
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| 关 键 词： | 大叶桃花心木 温度 幼苗 叶片 光合作用 表观量子产量 羧化效率 二氧化碳浓度 |
| 收稿时间： | 2003-03-11 |
Effect of overnight temperature on leaf photosynthesis in seedlings ofSwietenia macrophylla King |
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| Zhang Cheng-Jun,Carlos Henrique B. de A. Prado,Zu Yuan-Gang,Guo Jia-Qiu,Carlos Cesar Ronquim,Leonnardo Lopes Ferreira. Effect of overnight temperature on leaf photosynthesis in seedlings ofSwietenia macrophylla King[J]. Journal of Forestry Research, 2003, 14(2): 130-134. DOI: 10.1007/BF02856779 |
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| Authors: | Zhang Cheng-Jun Carlos Henrique B. de A. Prado Zu Yuan-Gang Guo Jia-Qiu Carlos Cesar Ronquim Leonnardo Lopes Ferreira |
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| Affiliation: | (1) Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 150040 Harbin, P. R. China;(2) Laboratory of Plant Physiology, Department of Botany, Federal University of Sao Carlos, 13565-905, SP, Brazil;(3) The Second Affiliated Hospital of Harbin Medical University, 150086 Harbin, P. R. China |
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| Abstract: | After exposure of one-year old seedlings ofSwietenia macrophylla to an overnight temperature (13°C, 19°C, 25°C, 31°C or 35°C), the leaf net photosynthetic rate (P n) was researched through measuring photosynthetic light-response curves at 360 μmol·mol−1 CO2, and photosynthetic CO2-response curves at light-saturated intensity (1500 μmol·m−2·s−1). The optimal temperature for photosynthesis measured at 360 μmol·mol−1 CO2 was from 25°C to 31°C, but which was from 31°C to 35°C at saturating CO2 concentration. At temperature of below 25°C, the decline inP n was mainly due to the drop in carboxylation efficiency (C e), while as temperature was over 31°C, the reduction inP n resulted from both decrease inC e and increase in leaf respiration. The CO2-induced stimulation of photosynthesis was strongly inhibited at temperatures below 13°C. The results showed that, the leaf photosynthesis of tropical evergreen plants should not be accelerated at low temperature in winter season with elevated CO2 concentration in the future. Biography: ZHANG Cheng-Jun (1968-), male, Lecturer in Key Laboratory of Forest Plant Ecology, Northeast Forstry University, Harbin 150040, P. R. China. Responsible editor: Zhu Hong |
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| Keywords: | Apparent quantum yield Carboxylation efficiency CO2-induced stimulation Swietenia macrophylla King Leaf temperature |
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