摘要
以不同浓度钙盐(0,10,50,100,150mmol/L CaCl2)模拟胁迫,研究胡枝子种子萌发期的生理特性,讨论喀斯特地区胡枝子对高钙环境的适应机制。结果表明:随着Ca2+浓度的增大,超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性总体上呈先降低后增加的趋势,当Ca2+浓度增加到100mmol/L时,SOD和CAT的活性降到最低,过氧化物酶(POD)的活性变化幅度较小;谷胱甘肽(GSH)和可溶性蛋白(SP)含量呈现二次函数变化趋势,在0~100mmol/L Ca2+浓度范围内,GSH和SP含量没有明显的变化,当Ca2+浓度增加到150mmol/L时,GSH和SP含量显著上升。
To investigate the Lespedeza seeds adaptation to high calcium environment in Karst area, this experiment analyzed the changes of physiological characteristics of Lespedeza during seed germination under different concentrations of calcium salt （0, 10, 50,100,150 mmol/L CaCl2 ） stress. Results showed that the SOD and CAT activity generally first decreased and then increased with the increase of concentration of Ca,when the concentration of Ca2＋ increased to 100 mmol/L,the activity of SOD and CAT dropped to the lowest point,POD activity change range was small;The GSH and SP content showed a trend of quadratic function change,in 0-100 mmol/L Ca2＋ concentration range,there was no obvious variation trend,when the concentration of Ca2＋ increased to 150 mmol/L,the GSH and SP content increased obviously.
出处
《种子》
北大核心
2015年第9期20-23,共4页
Seed
基金
贵州省自然基金(编号:黔科合J字[2012]2198)
贵州主要牧草抗热性生理诊断与调控机理研究(编号:黔科合LH字[2014]7699号)资助
关键词
钙胁迫
胡枝子
种子萌发
生理特性
calcium stress lespedeza
seed germination physiological features
