土壤pH值对脂松苗木膜脂过氧化及内源保护系统的影响  

Effects of Soil pH Variations on Lipid Peroxidation and Inherent Protection System of Red Pine Seedlings

作　　者：刘爽[1] 王庆成[1] 刘亚丽[1] 田宇明[1] 孙晶[1] 徐静[1] 

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《林业科学》2010年第2期152-156,共5页Scientia Silvae Sinicae

基　　金："948"项目"脂松优良种源和育苗造林技术引进"(2001-30)

摘　　要：Red Pine seedlings were grown in the potted soils with different acidity (pH=4.5,5.5,6.5,7.5,8.0) to investigate their physiological responses to soil pH,and futher to evaluate the soil pH feasibility. Dramatic physiological responses of Red Pine seedlings were detected under various soil pH treatments. Under soil pH 5.5,the seedling foliages grew best,with the lowest malondialdehyde content,ion leakage and soluble substance content,and the highest carotinoid content and antioxidant enzyme activities;With soil pH 7.5 and 8.0 treatments,the seedling needles developed poorest,with greater membrane lipid peroxidation and lower antioxidant enzyme activities,and the greater cell membrane injury and soluble substance content. Results suggested that Red Pine seedlings was mostly adapt to soil with pH of 5.5,followed by soils with pH of 4.5 and 6.5,and could hardly adapted to soil with pH of 7.5 and higher.Red Pine seedlings were grown in the potted soils with different acidity （pH=4.5,5.5,6.5,7.5,8.0） to investigate their physiological responses to soil pH,and futher to evaluate the soil pH feasibility. Dramatic physiological responses of Red Pine seedlings were detected under various soil pH treatments. Under soil pH 5.5,the seedling foliages grew best,with the lowest malondialdehyde content,ion leakage and soluble substance content,and the highest carotinoid content and antioxidant enzyme activities;With soil pH 7.5 and 8.0 treatments,the seedling needles developed poorest,with greater membrane lipid peroxidation and lower antioxidant enzyme activities,and the greater cell membrane injury and soluble substance content. Results suggested that Red Pine seedlings was mostly adapt to soil with pH of 5.5,followed by soils with pH of 4.5 and 6.5,and could hardly adapted to soil with pH of 7.5 and higher.

关 键 词：脂松 土壤PH值 质膜透性 膜脂过氧化 渗透调节 适应性 

分 类 号：Q945.78[生物学—植物学]