逆境胁迫下的亚高山草甸植物脯氨酸累积特点分析

Analysis on the changeable characteristics of adversity stress on proline of plants in subalpine meadow

以甘南亚高山草甸植物为研究样本,分析了不同环境梯度条件下6种植物莓叶萎陵菜(Otentillafragarioides)、火绒草(Leonto-podium nanum)、矮嵩草(Kobresia humilis)、棘豆(Oxytropis kansuensis)、狼毒(Stellerachamaejasme L.)、金露梅(Potentilla fruticosa)的游离脯氨酸的积累与变化.结果表明,随着生境(包括土壤水分、光照、温度等)的变化.6种植被叶片内脯氨酸含量随着从阴坡、半阴半阳坡、阳坡环境的变化都有不同程度的增加,而且,不同品种植物的脯氨酸含量的增加幅度有差异,进一步认为叶片内脯氨酸含量的高低可作为衡量植物抗逆性的指标.

Taking the plants distributed in subalpine meadow as study sample, the accumulation and change of free proline content of plants is particularly analysed at six plants （Otentilla fragarioides, Leonto-podium nanum, Kobresia humilis, Oxytropis kansuensis, Stellera chamaejasme L. , Potentilla fruticosa） in this paper. The results are as follows. With the change of growth environment （include water of soil, sunlight, temperature and so on）, the concentration of free proline（Pro） contents of leaves of six plants become higher in some extent from the shade slope to sunlight slope. The results also show that the concentration of free proline（Pro） is difference in increased extent under different plants species. The contents of proline can be used as indexes to show how the plants can endure the resistance.