期刊论文

Comparisons of biomass allocation between Plantago depressa plants growing in heavy-metal polluted and nonpolluted soils

中文

中南林业科技大学学报

1673-923X

2018

38

1

94-98

10.14067/j.cnki.1673-923x.2018.01.016

湖南省自然科学基金（2016JJ4120） 湖南省教育厅重点项目（14A156）

本校为第一机构

选择重金属污染区与非污染区自然生长的平车前Plantago depressa为研究对象,通过比较这2个种群植物个体大小、种子大小与数量、生物量分配的异同,揭示该植物对重金属胁迫环境的生态适应模式。结果显示: (1)污染区平车前植株高度为17.03 cm,单株生物量为1.62 g,较非污染区分别下降了16.9%和40.7%。(2)污染区平车前每株穗数、每穗果实数、每果实种子数较非污染区分别下降了47.3%、27.0%和12.7%;种子千粒重由非污染区的0.39 g减少为污染区的0.31 g,减少了20.5%。(3)与非污染区相比,污染区平车前根生物量分配比例显著增加,繁殖分配比例则无显著差异。研究结果说明平车前可通过减小个体大小、增加根生...

Individuals of Plantago depressa, which naturally growing on the heavy metal polluted (polluted population) and nonpolluted soils (nonpolluted population) were selected as study objects. Plant size, seed size and number, biomass allocation between individuals of different populations were compared to reveal the adaptive modes of this plant to heavy metal stress environment. The results showed that, (1) Mean plant height and individual biomass of plants from polluted population were 17.03 cm and 1.62 g, which decreased by 16.9% and 40.7% compared to that from nonpolluted populations. (2) The nu...