盐胁迫对无瓣海桑幼苗根茎叶膜保护系统的影响  

Effect of salt stress on protection system of membrane of roots,stems and leaves in Sonneratia apetala seedlings

作　　者：廖岩[1] 赵肖[1] 陈桂珠[2] 

机构地区：[1]环境保护部华南环境科学研究所,广东广州510655 [2]中山大学环境科学与工程学院,广东广州510275

出　　处：《海洋环境科学》2009年第2期154-158,共5页Marine Environmental Science

基　　金：中央级公益性科研院所基本科研业务专项项目(ZX2007-12-27)

摘　　要：通过对无瓣海桑用不同盐度的水3个月的处理，发现无瓣海桑根、茎、叶中蛋白质含量与可溶性总糖含量随盐度的变化而变化。当盐度高于10时，无瓣海桑茎、叶的膜脂质过氧化破坏显著加强，植物体内超氧化物歧化酶（SOD）活性也明显增加，两者具有很好的相关性（R^2=0．914）。随着盐度的升高，无瓣海桑各器官过氧化物酶（POD）和过氧化氢酶（CAT）活性都增强。根据试验结果，无瓣海桑能够在高盐度（50）下存活3个月。在盐度为0～10时，Sa在生理生态上表现对盐环境的适应性。当盐度高于20时，无瓣海桑的生理表现较为敏感，膜脂质氧化破坏严重。In this paper, the mangrove specie Sonneratia apetala was treated with the different salinity for3 months. It was found that the protein and soluble sugar contents in roots, stems and leaves in Sonneratia apetala were changed with salt concentration. When salinity is higher than 10, the effect of membrane peroxidation was enhanced remarkably, the activity of superoxide dismutase（SOD） was enhanced either and there is correlativity in them （R^2 = 0.914）. The activity of peroxidase （POD） and catalase（CAT） in the various organs of Sonneratia apetala was enhanced with the salt concentration. According to the results of experiments, it can be known that Sonneratia apetala could survive for 3 months salinity at 50. Sonneratia apetala exhibits the physiological adaptabilities between 0 - 10 salinity and is sensitive in physiology when salinity is higher than 20 and the effect of membrane peroxidation strengthened.

关 键 词：无瓣海桑 盐胁迫 蛋白质 可溶性糖 膜脂质过氧化 

分 类 号：Q945.78[生物学—植物学]