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作 者 ：关保华,葛滢,樊梅英,牛晓音,卢毅军,常杰

期 刊 ：生态学报 2003年 23卷 2期 页码：259~263

关键词：华荠苧；形态和生长；表型可塑性；土壤相对含水量；

Keywords:Mosla chinensis, growth and morphology, phenotypic plasticity, relative soil water content,

摘 要 ：研究了土壤相对含水量分别为 1 0 0 %、80 %、60 %、40 %和 30 %水分条件下华荠 ( Mosla chinensis)生长和形态的表型可塑性。结果表明 :成年植株的生物量积累、形态参数、单株叶绿素总含量及穗重等都在60 %相对含水量条件下最高 ;当土壤相对含水量从 30 %提高到 60 %时 ,分配到枝和根的生物量随之增加 ,分配到叶的生物量减少 ,土壤相对含水量再提高时 ,情况则相反 ;生殖比率随土壤相对含水量的下降而升高 ,30 %处理最大 ,1 0 0 %处理最小。这些结果说明华荠的适宜水分生态位是中偏湿的土壤环境。华荠通过器官生物量分配和形态结构调整对不同土壤水分产生可塑性响应 ,并以提高生殖比率的策略来适应干旱胁迫。

Abstract:The phenotypic plasticity, biomass, morphology, chlorophyll content and reproductive allocation (RA) of Mosla chinensis were studied in five soil water treatments, which were the relative water content (RWC) of holding capacities (WHC) in soil (100%, 80%, 60%, 40% and 30%). The root, shoot, branch and leaf biomass were positively correlated with RWC increase from 30%～80% of WHC; however, biomass declined at 100% WHC. Highest ratios of fresh weight to biomass in branch and leaf were observed at 80% WHC. M. c...

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