6种植物在逆境胁迫下脯氨酸的累积特点研究

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的6种植物:莓叶委陵菜Potentilla fragarioides、火绒草Leontopodium leontopodioides、矮嵩草Kobresia humilis、棘豆Oxytropis kansuensis、狼毒Stellera chamaejasme、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,植物品种的不同,脯氨酸含量的增加幅度有差异,进一步可以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。

Study on proline accumulation patterns of six plant species under adversity stress

The accumulation and variation patterns of free proline in 6 plant species (Potentilla fragarioides, Leontopodium nanum, Kobresia humilis, Oxytropis kansuensis, Stellera chamaejasme and Potentilla fruticosa) distributed in subalpine meadow of Gannan were studied at different environmental gradients. The results indicated that along with the change of environment (including soil water, temperature and sunlight) from the shade slope to sunlight slope, the concentration of free proline in leaf of 6 species increased in certain degree. The increasing range of free proline concentration among different species was different. The contents of praline could be used as an indicator for the resistance of plant.