| 匍匐茎草本金戴戴对盐分梯度的表型可塑性 |
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| 引用本文： | 于飞海,董鸣,张称意,张淑敏.匍匐茎草本金戴戴对盐分梯度的表型可塑性[J].植物生态学报,2002,26(2):140-148. |
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| 作者姓名： | 于飞海 董鸣 张称意 张淑敏 |
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| 作者单位： | 中国科学院植物研究所数量植被生态学重点实验室,北京,100093 |
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| 基金项目： | NationalScienceFundforDistinguishedYoungScholarsofChina ( 3982 5 10 6)andNationalNaturalScienceFoundationofChina ( 395 70 127) |
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| 摘 要： | 研究了匍匐茎型克隆草本金戴戴(Halerpestes ruthenica) 4种基株（基因型）对不同盐分处理（0，85.5, 171.0, 256.5和342.0 mM NaCl）的表型可塑性。随着盐分浓度的增加，实验植物与生长相关的性状指标 (如植株干重、总叶面积、分株数和总匍匐茎长度) 显著减小。植株干重、总叶面积和总匍匐茎长度具有显著的基株间差异。实验植物与形态相关的性状指标 (如平均叶柄长和根冠比) 对盐分梯度具有可塑性并具有显著的基株间差异；而其它形态指标 (如平均节间长、比节间长和比叶柄长)
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| 关 键 词： | 克隆生长 克隆形态 表型可塑性 金戴戴(Hale |
PHENOTYPIC PLASTICITY IN RESPONSE TO SALINITY GRADIENT IN A STOLONIFEROUS HERB HALERPESTES RUTHENICA |
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| Abstract.PHENOTYPIC PLASTICITY IN RESPONSE TO SALINITY GRADIENT IN A STOLONIFEROUS HERB HALERPESTES RUTHENICA[J].Acta Phytoecologica Sinica,2002,26(2):140-148. |
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| Authors: | Abstract |
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| Abstract: | Genotypic variation and phenotypic plasticity of growth and morphology in a stoloniferous clonal herb Halerpestes ruthenica in response to a series of salinity treatments (i.e., 0, 85.5, 171.0, 256.5 and 342.0 mM NaCl) were investigated. As the degree of salinity increased, growth related traits such as plant dry weight, total leaf area, total number of ramets and total stolon length of the experimental plants of each of the four genets were greatly reduced. Additionally, genotypic (genet) variation of plant dry weight, total leaf area and total stolon length in the experimental plants was found. Concerning morphology related traits, only mean petiole length and root to shoot ratio responded significantly to salinity and showed genotypic variation, while specific petiole length, mean internode length and specific internode length did not show either genotypic variation or plastic responses to salinity. In terms of four growth related traits (plant dry weight, total leaf area, total number of ramets and total stolon length) as well as two morphology related traits (mean petiole length and root to shoot ratio), the four genets demonstrated different plasticity patterns in response to salinity gradient. The adaptive strategies of H. ruthenica growing in different habitats as well as the evolutionary implications of genotypic variation in phenotypic plasticity in response to salinity gradient are discussed. |
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| Keywords: | Clonal growth Clonal morphology Phenotypic plasticity Halerpestes ruthenica Salinity Genotypic variation |
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