摘要
研究了根区温度对甜瓜幼苗叶片相对膜透性、丙二醛(MDA)和保护酶SOD、POD活性及脯氨酸、可溶性糖含量的影响。结果表明:随根区温度的降低,甜瓜叶片细胞膜相对透性、MDA含量、脯氨酸含量和可溶性糖含量增大。根区温度胁迫对甜瓜叶片保护酶活性具有明显的激活效应,但在低温胁迫下POD活性受到抑制。在根区低温胁迫下,甜瓜不是被动忍受逆境胁迫,而是主动地通过调节渗透调节物质、SOD及POD活性等生理代谢过程,以减缓逆境的伤害。
The effect of different root zone temperatures on the membrane lipid peroxidation and osmotic adjustment in muskmelon plants were studied by Eco-organic soil-less cultivation experiments. The results showed that the membrane permeability and contents of MDA, proline, soluble sugar increased with the decreasing of root zone temperature. Root zone temperature stress can stimulate SOD and POD activity, but with the extent of stress, the activity of POD turned to restrained. Muskmelon plants were not passively tolerant to stress, but actively regulated their physiological metabolic processes, so that root injury by the environmental stress could be reduced.
出处
《北方园艺》
CAS
北大核心
2009年第7期160-162,共3页
Northern Horticulture
基金
甘肃省中青年科技基金资助项目(3ZS051-A25-070)
关键词
甜瓜
根区温度
电导率
丙二醛
保护酶活性
渗透调节物质
Cucumis melo L.
Root zone temperature
Membrane permeability
MDA
Resistant-oxidation enzyme activities
Osmotic adjustment