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磷、铜及其相互作用对三叶草种子萌发与幼苗生长的影响

陈雪梅;王友保;姚婧;安雷   

  1. 安徽师范大学生命科学学院, 安徽芜湖 241000
  • 收稿日期:2007-10-23 修回日期:1900-01-01 出版日期:2008-06-10 发布日期:2008-06-10

Effects of phosphorus, copper, and their interaction on seed germination and seedling growth of Trifolium repens L.

CHEN Xue-mei'WANG You-bao;YAO Jing;AN Lei   

  1. College of Life Science, Anhui Normal University, Wuhu 241000, Anhui, China
  • Received:2007-10-23 Revised:1900-01-01 Online:2008-06-10 Published:2008-06-10

摘要: 通过水培实验研究了施加P对Cu2+胁迫下三叶草种子萌发活力、幼苗生物量、光合色素含量以及电导率的影响。重金属Cu2+(0~20 mg·L-1)显著抑制了三叶草种子萌发和幼苗生长。但当施加0.06%的P后,明显提高了Cu2+胁迫下的三叶草种子萌发率,促进了幼苗的生长,生物量、光合色素含量显著增加,同时幼苗叶片细胞膜透性极显著下降。可见,外施一定量P能缓解过量Cu2+对三叶草的毒害。

关键词: 物种多样性, 物种多样性指数, 物种丰富度, 海拔带, 祁连山区

Abstract: A solutionculture experiment was conducted to explore the effects of phosphorus application on the seed germination vigor, seedling biomass, photosynthetic pigment content, and electric conductivity of Trifolium repens L. under Cu stress. The results showed that heavy metal Cu2+ (0-20 mg·L-1) inhibited the seed germination and seeding growth of T. repens significantly. After phosphorus application (0.06%), the germination rate suppressed by Cu enhanced markedly, seedling growth was promoted, biomass and photosynthetic pigment content increased, and leaf cell membrane permeability decreased remarkably. Evidently, applying definite amount of phosphorus could alleviate the poisoning of excessive Cu2+ to T. repens.

Key words: Species diversity, Biodiversity index, Species richness, Altitude level, Qilian Mountains