Ca^(2+)对NaCl胁迫下黄瓜幼苗耐盐性的影响  

Effect of Ca^(2+) on the Salt Tolerance of Cucumber Seedlings under NaCl Stress

作　　者：符秀梅[1] 谢俊[1] 夏幽泉[1] 李小靖[1] 吴辉[1] 朱红林[1] 陈银华[1] 

机构地区：[1]海南大学农学院/教育部热带生物资源重点实验室,海口570228

出　　处：《湖北农业科学》2010年第3期609-611,共3页Hubei Agricultural Sciences

基　　金：海南省自然科学基金项目(80540;80612);海南省教育厅科学技术项目(Hj200607);海南大学校级重点学科项目

摘　　要：研究了NaCl和CaCl2共同胁迫对3个黄瓜(Cucumis sativus L.)品种幼苗期的生长指标、游离脯氨酸及可溶性蛋白质含量的影响。结果表明,新津春的耐盐性强于津优1号及蔬春。在相同浓度的Na+胁迫下,Ca2+加剧了Na+对黄瓜幼苗生长的抑制作用,且随着Ca2+浓度的升高,抑制作用越来越大;而Ca2+的加入对干物质的积累、游离脯氨酸含量的影响不大,叶片可溶性蛋白质含量反而显著升高。这表明Ca2+的加入通过抑制生长、减少消耗、增加可溶性固形物含量等途径降低了盐胁迫对植株的危害,增强了黄瓜对逆境的适应性。Three cucumber（Cucumis sativus L.） cultivars of Jinyou No.1,Xinjinchun and Shuchun were grown in nutrient solutions with five CaCl2 levels（0,10,20,30,40 mmol / L） under 100 mmol / L NaCl stress for the investigation of plant growth,free proline,soluble protein.The results showed that the added Ca^2＋ increased the inhibition of plant growth under the same NaCl stress.Meanwhile,the content of the free proline and soluble protein increased with the level of added Ca^2＋.In the three cultivars,Jinyou No.1 was more tolerant than other two.This implied that the added Ca^2＋ could increase the salt tolerance of the cucumber through the way of inhibiting the plant growth,increasing the content of free proline and soluble protein.

关 键 词：黄瓜 盐胁迫 生长指标 游离脯氨酸 可溶性蛋白质 

分 类 号：S642.2[农业科学—蔬菜学] Q945.78[农业科学—园艺学]