生物学杂志

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湿地植物丝瓣剪秋罗幼苗对温度和土壤养分的表型可塑性响应

  

  1. 1. 国家环境保护湿地生态与植被恢复重点实验室, 长春 130117;2. 东北师范大学 环境学院, 长春 130117
  • 出版日期:2019-04-18 发布日期:2019-04-18
  • 通讯作者: 唐占辉,副教授,主要从事植物繁殖生态学研究,E-mail:tangzh789@nenu.edu.cn
  • 作者简介:包宇,硕士研究生,主要从事植物繁殖生态学研究,E-mail:baoy925@nenu.edu.cn
  • 基金资助:
    国家自然科学基金项目(31470446);国家环境保护湿地生态与植被恢复重点实验室开放课题(130028629)

Phenotypic plasticity of seedlings of Lychnis wilfordii (Regel) Maxim response to temperature and soil nutrient conditions

  1. 1. State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Changchun 130117; 2. School of Environment, Northeast Normal University, Changchun 130117, China
  • Online:2019-04-18 Published:2019-04-18

摘要: 选取温度和土壤养分两个非生物因子进行模拟控制实验,探究湿地植物丝瓣剪秋罗幼苗的生长、生物量积累和分配及相对生长率对这两种因子变化的表型可塑性响应规律。结果表明:随着温度的增高,丝瓣剪秋罗幼苗的株高、总生物量、相对生长率增大,但根冠比随温度增高而降低;温度变化对株高和相对生长率的影响最为显著,相对生长率可塑性最强。在土壤养分增加的条件下,丝瓣剪秋罗幼苗的株高、总生物量、相对生长率均增加,但根冠比随养分增高而降低;土壤养分条件变化对株高及根冠比的影响最为显著,根冠比可塑性最强。实验结果也表明,丝瓣剪秋罗幼苗对温度变化的可塑性高于对土壤养分变化的可塑性。

关键词: 丝瓣剪秋罗, 幼苗, 表型可塑性, 温度, 土壤养分

Abstract: The aim of this study is to elucidate the response of the seedlings of L. wilfordii (Regel) Maxim to temperature and soil nutrient treatments. The effects of non-biological environmental factors on the phenotypic plasticity of the plant height, biomass accumulation, biomass allocation and the relative growth rate of L. wilfordii seedlings were studied. The results showed that the plant height, total biomass, relative growth rate and root/ shoot ratio of the seedlings were different under different temperature conditions. The growth performance were promoted with the temperature increasing, but the root/ shoot ratio decreased with increasing temperature. The effect of temperature conditions on plant height and relative growth rate was the most significant. The plant height, total biomass, relative growth rate and root/ shoot ratio of the seedlings were different under different soil nutrient conditions. The growth performance were also promoted with the soil nutrient increasing, excepting for root/shoot ratio. The effects of soil nutrient on plant height and root/shoot ratio were significant. The plasticity of relative growth rate was the strongest under different temperature conditions. Under different soil nutrient treatments, the plasticity of root/shoot ratio was the strongest. The results showed that the plasticity of the L.wilfordii (Regel) Maxim seedlings to temperature change is higher than that to soil nutrient change.

Key words: L. wilfordii (Regel) Maxim, seedlings, phenotype plasticity, temperature, soil nutrient

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