摘要
报道了马占相思 QL D19835家系 7个月苗龄的树苗在低温胁迫下 ,电导率、可溶性糖、脯氨酸和可溶性蛋白质的含量变化及 ATP酶 (ATPase)、过氧化氢酶 (CAT)、过氧化物酶 (POD)、超氧物歧化酶 (SOD)的活性动态变化 ,揭示了在低温逆境下 ,由于细胞膜系统受到寒害而使电导率不断升高 ,ATPase活性亦有所下降 ,而可溶性糖、脯氨酸和可溶性蛋白质的含量则显著升高。这在保护细胞膜稳定性方面起到重要的作用 ,增强了植株本身对低温的忍耐能力。另外 ,CAT活性升高 ,POD、SOD的活性有所下降 ,但仍保持一定活性 ,提高了它们对氧自由基和过氧化物的清除 ,这些变化的总效应是使植物细胞膜结构和物质代谢过程中免遭寒害 。
The plants of Acacia mangium QLD19835 clone were studied under the chilling stress in the phytotrons. The plants suffered from temperature changes from 30 ℃ to 6 ℃. The results showed that the electrical conductivity, the contents of soluble sugar, proline, soluble protein in the phyllodia (petioles) increased in the low temperature stress. The activities of ATPase, catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD) changed with chilling treatment. Under the stress of low temperature, cell membrane system was damaged and the electrical conductivity increased. The activity of ATPase decreased. These physiological changes might play an important role in protecting cell stability and promoting the enduring ability of plants to the low temperature. The results indicated that Acacia mangium QLD19835 clone had enduring ability to the stress of low temperature.
出处
《林业科学研究》
CSCD
北大核心
2001年第6期633-640,共8页
Forest Research
基金
广东省林业厅重点课题"DNA分子标记在马占相思抗性育种中的应用研究"(1998- 0 38)的部分内容
