摘要
用不同浓度的ＰＥＧ对甘薯进行根际渗透胁迫处理，研究了对叶绿体超微结构和膜脂过氧化的影响．结果表明，经不同浓度的ＰＥＧ渗透胁迫２４ｈ后，叶片细胞质膜透性、ＭＤＡ含量增加，ＣＡＴ活性升高；ＳＯＤ活性表现出品种抗旱适应特性．相同的渗透胁迫条件对抗旱性较强的渝薯２０的超微结构破坏明显小于抗旱性较弱的农大红．
The effects of ultrastructural structure in chloroplast and membrane lipid peroxidation under different concentration of polyethylene glycol(PEG) treatment to osmotic stress rhizosphere of sweet potato were studied.The results showed that permeability of plasma membrane,contents of malondialdehyder(MDA) and activities of catalase(CAT) were increased in different PEG osmotic stress for 24 hours.The attribute was appearanced of drought of superoxide dismatase(SOD) activites. The ultrastructural structure breaked in the stronger drought 'Yushu 20' was less than that of 'Nong Dahong',a weak drought resistance in the same osmotic stress.The experiment results argued that osmotic stress caused active oxygen accumulated with violent damge role to chloroplast membrane structure of sweet potato.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第2期169-176,共8页
Journal of Southwest China Normal University(Natural Science Edition)
基金
重庆市中青年科技专家基金
关键词
甘薯
渗透胁迫
超微结构
膜脂过氧化
叶绿体
sweet potato
osmotic stress
structure stress
ultrastructure
membrane lipid peroxidation
