论文部分内容阅读
以无患子幼苗为试验材料,采用不同程度的土壤水分胁迫和不同处理时间,研究无患子幼苗对水分胁迫强度的生理响应.结果表明:随着胁迫程度提高,幼苗叶片丙二醛、脯氨酸含量、相对电导率和可溶性蛋白含量呈上升趋势,而可溶性糖含量、过氧化物酶、超氧化物歧化酶和过氧化氢酶活性呈先升后降趋势;随着胁迫时间延长,除过氧化氢酶活性先升后降外,其它指标均逐渐提高.土壤相对含水量低于35%~40%后不利于无患子幼苗生长;渗透调节物质和保护酶协同调节无患子幼苗的水分生理.无患子幼苗对水分胁迫的适应能力较强,具有一定耐旱能力,适合重庆季节性缺水山区造林.
Sapindus salivarius seedlings were used as experimental materials to study the physiological responses of Sapindus salivarius seedlings to water stress with different degrees of soil water stress and different treatment time.The results showed that with the increasing of stress level, the malondialdehyde The content of soluble sugar, peroxidase, superoxide dismutase and catalase increased at first and then decreased with the increase of stress time Catalase activity increased first and then decreased, and other indicators were gradually increased.When soil relative water content was less than 35% ~ 40%, it was not conducive to the growth of Sapindus sativus seedlings. Osmotic regulator and protective enzyme co-regulated Moisture Physiology.Sophilus seedlings have stronger adaptability to water stress and drought tolerance, which is suitable for afforestation in seasonal water-deficient mountainous areas in Chongqing.