Lang Duo-Yong, Cui Jia-Jia, Da Zhou, Li Yue-Tong, Zhou Li, Zhang Xin-Hui
Zhongguo Zhong Yao Za Zhi. 2014 Jun;39(11):1995-9.
A pot experiment was conducted to study effect of drought stress on leaf physiological characteristics and growth of one year old Stellaria dichotoma seedlings. The result showed that plant height and shoot dry weight significantly decreased with decrease in soil water content; however, root length and root dry weight increased at light drought stress and decreased at severe drought stress. The result also showed that with the decrease of soil water content, proline content in S. dichotoma leaves decreased then increase, while solube protein content decreased. Activities of SOD and POD in S. dichotoma leaves significantly decreased as soil water content decreased, while activity of CAT significantly decreased at severe drought stress. Membrane permeability in S. dichotoma leaves increased, while MDA content decreased then increased as soil water decreased. These results suggest that S. dichotoma had osmotic stress resistance ability and reactive oxygen scavenging capacity at light drought stress, which caused S. dichotoma growth was no inhibited at a certain extent drought stress.
通过盆栽试验研究干旱胁迫对一年生二歧繁缕幼苗叶片生理特性和生长的影响。结果表明，株高和地上部干重随土壤含水量降低而显著下降；然而，根长和根干重在轻度干旱胁迫时增加，在重度干旱胁迫时下降。结果还表明，随着土壤含水量降低，二歧繁缕叶片中脯氨酸含量先降低后升高，而可溶性蛋白含量降低。二歧繁缕叶片中SOD和POD活性随土壤含水量降低而显著下降，而CAT活性在重度干旱胁迫时显著下降。二歧繁缕叶片膜透性增加，MDA含量随土壤水分降低先下降后升高。这些结果表明，二歧繁缕在轻度干旱胁迫时具有渗透胁迫抗性能力和活性氧清除能力，这使得二歧繁缕在一定程度干旱胁迫下生长未受抑制。
