摘要
以宁夏枸杞为材料,研究NaCl胁迫下枸杞幼苗组织含水量、干物质重量、无机离子分布、质膜透性、丙二醛 (MDA)含量及幼根质膜、液泡膜H+-ATPase活性和耐盐性之间的关系。结果表明,在0．3％NaCl胁迫下,干物质重量、质膜透性、MDA含量略有增加,组织含水量略有下降;随着NaCl胁迫强度的增加,Na+、Cl-含量逐渐增加, K+含量则呈现下降的趋势;质膜透性增大与MDA含量升高呈显著正相关;质膜和液泡膜H+-ATPase活性逐渐增加,且液泡膜H+-ATPase活性显著高于质膜H+-ATPase活性,表明枸杞具有较强的抗盐性。
Lycium barbarum growing in Ningxia was employed to study the relation of salt tolerance with water content,dry matter weight,inorganic ion distribution, plasmalemma permeability and MDA content in L. barbarum seedlings and plasmlemma and tonoplast H^＋-ATPase activities in young seedling roots of L. barbarum. The results indicated that under the stress of 0. 3% NaCl,the dry matter weight,plasmalemma permeability and MDA content slightly increased but the water content slightly declined ;as NaCl stress became intensified,the Na^＋ and Cl^- contents gradually increased but the K^＋ content appeared to decline; the increase in the plasmalemma permeability appeared significantly positively correlated with the increase in the MDA content;the plasmalemma and tonoplast H^＋-ATPase activities gradually increased and the former was significantly higher than the latter,which showed that Lycium barbarum had a strong salt tolerance.
出处
《西北植物学报》
CAS
CSCD
北大核心
2006年第4期748-752,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
宁夏自然基金重大项目(2003ZD01)国家自然科学基金项目(30500653)
