NaCl胁迫对不同砧木黄瓜嫁接苗生理生化指标的影响  

Effects of NaCl Stress on the Physiological and Biochemical Indexes in Cucumber Seedling Grafted from Different Rootstocks

作　　者：张自坤[1] 刘世琦[1] 张强 王忠全 孟凡鲁[1] 杨晓丽[1] 

机构地区：[1]山东农业大学园艺科学与工程学院,作物生物学国家重点实验室,山东泰安271018 [2]山东正大农业科技有限公司,山东潍坊262403

出　　处：《中国蔬菜》2009年第22期33-38,共6页China Vegetables

基　　金：国家科技支撑计划项目(2006BAD13B106)

摘　　要：在不同浓度NaCl胁迫条件下,研究了6种砧木的黄瓜嫁接苗以及自根苗的耐盐性生理生化指标的变化。试验结果表明:在NaCl胁迫下,嫁接苗叶片光合特性参数(光合速率Pn、气孔导度Gs、胞间CO2浓度Ci)、保护酶(超氧化物歧化酶SOD、过氧化物酶POD、过氧化氢酶CAT、抗坏血酸过氧化物酶APX)活性、渗透调节物质(脯氨酸Pro、可溶性糖和可溶性蛋白)含量均高于自根苗,而电解质渗漏率和丙二醛MDA含量低于自根苗。不同砧木嫁接苗的耐盐能力也不同,6种砧木嫁接苗的耐盐性依次为崛京隆>DTT-RS-39>改良火凤凰>火凤凰>黑籽南瓜>优清台木。The physiological and biochemical indexes were studied in cucumber （ Cucumis sativus L. ） seedlings grafted on six rootstock varieties and self-rooted cucumbers under NaCl stress of different concentrations. The results showed that the photosynthetic characteristics （Pn, Gs and Ci）, the protective enzymes （SOD, POD, CAT, APX） activities, the contents of osmotic adjustment substance （Pro, soluble sugar and soluble protein） in the leaves of the grafted plants were higher than those in the leaves of self-rooted plants, while the electrotyle 1 cucumber seedlings grafted on different eakage and the content of MDA is lower. NaCl resistance of rootstocks were different, and the salt tolerance abilitv is ‘Juejinglong’ 〉 ‘DTT- RS - 39’ 〉 ‘Modified Huofenghuang’ 〉 ‘ Huofenghuang＇ 〉 ‘ Black seed pumpkin＇ 〉 ‘ Youqingtaimu＇.

关 键 词：砧木 NACL胁迫 光合特性 保护酶活性 渗透调节物质 

分 类 号：S642.2[农业科学—蔬菜学]