摘要
为研究麦冬在水分胁迫和盐分胁迫条件下一些抗逆性生理指标的变化,本文以盆栽后以正常浇水处理为对照,设置了不同程度人工水分胁迫和钙离子胁迫处理研究可溶性糖含量、脯氨酸含量及丙二醛含量的变化情况。结果显示,轻度水分胁迫使可溶性总糖和游离脯氨酸含量减低,但随着时间的推移,胁迫程度加剧,可溶性总糖和游离脯氨酸含量开始回升,而MDA含量无显著变化,表明水分胁迫下,麦冬可积累可溶性糖和游离脯氨酸等渗透调节物质,从而改善自身水分状况,保护细胞膜及生理代谢过程,膜脂过氧化程度减轻。钙盐胁迫也可使可溶性总糖和游离脯氨酸含量升高。
To study the responses of Ophiopogon japonicas leaves in physiological indexs of stress resistance under water stress and salt stress. Three levels of simulated water stress and three levels of CaCl2 stress and a contrast treatment were set, and the content of soluble sugar, proline and MDA were measured respectively. Results showed that soluble sugar and proline content reduced under light water stress but increased when stress level became severe and that there was no significant changes in MAD content. That is, Ophiopogon japonicas can accumulate soluble sugar and proline as resistant materials to perform function in osmoregulation, so as to improve water content of leave cells and protect the cell membrane and metabolism from damage. CaCl2 stress improved the content of soluble sugar and proline in Ophiopogon japonicas leaves, too.
出处
《现代生物医学进展》
CAS
2009年第1期59-61,103,共4页
Progress in Modern Biomedicine
基金
湖北省科技创新团队计划(T200702)
湖北省教育厅中青年优秀人才项目(基金编号:2003B001)
关键词
麦冬
胁迫
可溶性总糖
脯氨酸
丙二醛
Ophiopogon japonicus
Stress
Soluble sugar
Proline
Malondialdehyde（MDA）
