在干旱和水胁迫影响下盆栽青海冷地早熟禾中矿物元素蓄积性研究

Accumulation Characteristic of Mineral Elements in Potted Poa crymophila under Drought and Water Stress

[目的]为了解释高寒草地植物中矿物元素蓄积增加的机理。[方法]通过盆栽高寒草地植物青海冷地早熟禾,在干旱和水胁迫影响试验处理下,分析试验样品中的矿物元素含量变化。[结果]干旱和水胁迫影响下,盆栽青海冷地早熟禾中多种矿物元素营养都具有蓄积增加的趋势,且Cu、Mn、Ni、P等元素具有显著性差异(P<0.05),[结论]多种矿物元素营养在盆栽青海冷地早熟禾积累是其对干旱或水胁迫等环境变化的适应与响应,也是矿物元素饥饿效应假说理论的再检验,而生物矿物元素饥饿效应是矿物元素蓄积分异行为发生的内动力之一。

[Objective]The aim was to explain the mechanism of mineral elements accumulation characteristic in alpine grassland plants.[Method]Potted alpine grassland plants such as Poa crymophila were treated with droughts and water stress,mineral elements content variation of test samples was analyzed.[Result] Accumulation of mineral elements of Poa crymophila in the droughts and water stress control group showed increasing trend,there were significant differences(P < 0. 05) in accumulation of mineral elements in the potted Poa crymophila,such as Cu,Mn,Ni,P and so on.[Conclusion]Accumulation of mineral elements in the potted Poa crymophila was the response and adaptation to the growth environments,and that was a reinspection for the starvation effect hypothesis of mineral elements. However,the"starvation effect"may be one of the endogenetic forces for accumulation and differentiation of biological mineral elements.