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Response of Dry Matter Accumulation and Chlorophyll Fluorescence Parameters of Haloxylon ammodendron Seedlings to NaCl Stress
Authors
吕湘芳
岳红霞
+3 more
徐新文
李利
韩张雄
Publication date
1 January 2011
Publisher
Abstract
以生长在荒漠地区的典型植物梭梭(Haloxylon ammodendron)幼苗为实验材料,研究了它在不同浓度NaCl处理后30 d和50 d时的叶绿素荧光参数、地上/地下干物质重量及叶片数量变化特征。结果表明,在NaCl处理后30 d时,随着NaCl浓度的增加,梭梭幼苗地上部分干重、地下部分干重、总干重及叶片数量显著减少;在NaCl处理后50 d时,梭梭幼苗地上部分干重、地下部分干重、总干重及叶片数量较处理后30 d时显著增加,且高浓度NaCl处理的增加幅度更大,但以上参数变化在不同NaCl浓度处理间差异不显著。叶绿素荧光参数的变化则相反,在NaCl处理后50 d时较30 d时显著降低。在遭受到盐分胁迫后梭梭幼苗干物质量随着时间的延长增加,而叶绿素荧光参数在NaCl处理后50 d时较30 d时显著降低,其光合机构可能遭到破坏,光合能力降低。遭受NaCl胁迫时,梭梭幼苗光合能力降低,但其干物质仍在积累,这可能是梭梭适应盐渍生境的一种方法
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016