| 土壤水分含量对欧李叶绿素荧光及光合特性的影响 |
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| 引用本文： | 李淑英,王北洪,马智宏,黄文江,周连第.土壤水分含量对欧李叶绿素荧光及光合特性的影响[J].安徽农学通报,2007,13(14):25-27,59. |
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| 作者姓名： | 李淑英 王北洪 马智宏 黄文江 周连第 |
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| 作者单位： | 北京市农林科学院农业综合发展研究所,北京,100097;国家农业信息化工程技术研究中心,北京,100077 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，北京市科委科研项目，北京市自然科学基金，农业部引进国际先进农业科学技术专项基金 |
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| 摘 要： | 为探讨干旱胁迫下欧李的光合机构功能及其干旱逆境的生理响应机制,采用室外盆栽的试验方法,研究了欧李在不同土壤水分条件下的生理生态反应.结果表明:随着土壤含水量的减少,欧李体内水分出现有效亏缺,叶绿素逐渐分解.当土壤含水量维持在田间持水量的55%-60%时,欧李尚能适应干旱环境而保证其光合机构免受光损伤,而当土壤含水量进一步降低时,其光合机构则会受到光损伤,午间高光强下发生可逆性光抑制,且光抑制程度随着土壤干旱程度的增加而增强.
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| 关 键 词： | 欧李 干旱胁迫 叶绿素荧光 光合特性 |
| 文章编号： | 1007-7731（2007）14-25-03 |
| 收稿时间： | 2007-07-06 |
| 修稿时间： | 2007-07-06 |
Effects of Soil Water Contents on Chlorophyll Fluorescence and Photosynthesis Characteristics of Cerasus Humillis Bunge |
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| Li Shuying et al.Effects of Soil Water Contents on Chlorophyll Fluorescence and Photosynthesis Characteristics of Cerasus Humillis Bunge[J].Auhui Agricultural Science Bulletin,2007,13(14):25-27,59. |
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| Authors: | Li Shuying |
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| Institution: | Institute of Agriculture Integrated Development, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097 |
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| Abstract: | In order to survey the photosynthetic mechanism function and physiological response mechanism under drought stress, using Cerasus humillis Bunge as experiment materials and pot culture experiments simulating soil drought, its physiological ecology response under different soil water levels were studied. The results showed that moisture content of Cerasus humillis Bunge appeared deficit, and chlorophyll decomposed with soil water decreasing. Cerasus humillis Bunge can adapt to the drought enviroment and insure it's' photosynthetic apparatus against light damage under the soil moisture of 55%~60% field water capacity. With the soil moisture content reduction, it's' photosynthetic apparatus was damaged by the light, and occur reversible photoinhibition under high light intensity at noon. The photoinhibition degree increased with drought level of the soils. |
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| Keywords: | Cerasus humillis Bunge Drought stress Chlorophyll fluorescence Photosynthesis characteristics |
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