Si对NaCl胁迫下枣叶栅栏细胞超微结构的影响  

Influence of Si on Leaf Palisade Cell Ultrastructure of Ziziphus jujuba Mill. under Salt Stress

作　　者：徐呈祥[1,2] 徐锡增[1] 甘习华[1] 

机构地区：[1]南京林业大学森林资源与环境学院,南京210037 [2]肇庆学院生命科学学院

出　　处：《中国南方果树》2011年第1期16-19,24,共5页South China Fruits

基　　金：江苏省博士后科研计划(0701039B);中国博士后科学基金(20070411057);国家自然科学基金(30471368)资助

摘　　要：以酸枣Ziziphus spinosus(Bunge)Hu.砧2年生金丝小枣Z.jujuba‘Jinsixiaozao’盆栽苗为试材,研究了NaCl胁迫对枣叶栅栏细胞超微结构的影响及增施可溶性硅(Si,0.040%)的效应,旨在进一步揭示枣树耐盐性与Si营养的关系。结果表明:0.30%NaCl胁迫165天后枣叶栅栏细胞超微结构产生了较明显伤害,0.50%NaCl胁迫165天则产生严重伤害;土壤施可溶性硅明显减轻前述盐胁迫对枣叶栅栏细胞超微结构的伤害,突出表现是叶绿体精细结构保持较好,淀粉粒、被膜泡囊等内含物增多。说明,提高土壤中生物有效硅水平,对盐胁迫特别是重度盐胁迫下枣树叶片栅栏细胞结构和功能具显著保护作用。The influence of salt stress on ultrastructure of palisade cells in the leaves of Ziziphus jujuba Mill.cv.Jinsixiaozao and the effect of silicon application were studied with two-year-old pot-cultured plants.Results showed that the ultrastructure of palisade cells in leaves was obviously injured under salt stress of 0.30% NaCl for 165 days and seriously injured under salt stress of 0.50% NaCl for 165 days.Soil application of soluble silicon（0.040%） evidently alleviated the stress symptoms of palisade cell ultrastructure as evidenced by the well-kept precise structure of the chloroplasts,the remarkable increase in numbers of starch grains and osmiophilic content containing vesicles.These results indicated that increasing available soluble silicon level in soil prevents leaf cells from salt stress induced ultrastructure damages and function abnormities of palisade cells in jujube leaves.

关 键 词：枣 盐胁迫 硅 栅栏细胞 超微结构 

分 类 号：S665.1[农业科学—果树学] Q945.78[农业科学—园艺学]