中国沙漠  2008, Vol.28 Issue (3): 449-454  
土壤逐渐干旱对4种荒漠植物光合作用和海藻糖含量的影响
1.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; 2.中国科学院研究生院, 北京 100039
Response of Photosynthesis Function and Trehalose Content of Four Desert Plants to Gradual Drought Stress
1.Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;2.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

摘要

以腾格里沙漠东南缘4种优势植物红砂(Reaumuria soongorica Maxim)、珍珠(Salsola passerina Bge)、柠条锦鸡儿(Caragana korshinskii Kom)和油蒿(Artemisia ordosica Krasch)为对象,研究土壤逐渐干旱对叶片相对含水量、净光合速率(Pn)、叶绿素荧光参数及海藻糖含量的影响。结果表明:土壤逐渐干旱过程中,4种植物的叶片相对含水量、净光合速率(Pn)、光系统II(PSⅡ)最大光化学量子产量(Fv/Fm) 、光系统II表观电子传递速率(ETR)、光化学淬灭(qP)都随干旱程度的加剧而下降;非光化学淬灭(qN)和海藻糖含量随干旱程度的增加而升高。4种植物对干旱过程的响应差异明显,随着土壤干旱的加剧,相对于其他三种植物,柠条具有更高的抗逆保护能力。相关分析表明,土壤含水量显著影响着4种植物的光合作用和海藻糖累积,海藻糖含量与光合作用存在相关性。

Abstract

The responses of net photosynthetic rate(Pn), chlorophyII fluorescence parameters and trehalose content of Reaumuria soongorica Maxim, Salsola passerina Bge, Caragana korshinskii Kom and Artemisia ordosica Krasch, to drought stress were studied. The results were as follows: Relative water content of leaves, net photosynthetic rate, maximal photochemical efficiency of PSⅡ in the dark(Fv/Fm), apparent quantum transport rate(ETR), photochemical quenching(qP) decreased, trehalose content and non photochemical quenching(qN) increased under drought stress. The effects of drought stress on those variables among the four desert plants were obviously different, and Caragana korshinskii Kom was the highest tolerance and resistant to drought stress among the four plants studied. Correlation between soil water content, trehalose content, net photosynthetic rate and chlorophyII fluorescence parameters was analyzed. The results indicated that soil water content remarkably affected photosynthesis and trehalose content of four desert plants.
收稿日期:2007-08-27

引用本文

[中文]
宋维民;周海燕;贾荣亮;赵 昕;冯 丽;谭会娟. 土壤逐渐干旱对4种荒漠植物光合作用和海藻糖含量的影响[J]. 中国沙漠, 2008, 28(3): 449-454.
[英文]
SONG Wei-min;ZHOU Hai-yan;JIA Rong-liang;ZHAO Xin;FENG Li;TAN Hui-juan. Response of Photosynthesis Function and Trehalose Content of Four Desert Plants to Gradual Drought Stress[J]. JOURNAL OF DESERT RESEARCH, 2008, 28(3): 449-454.
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