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铝对大豆根系分泌物的影响
引用本文:王芳,黄朝表,刘鹏,汪伟仙. 铝对大豆根系分泌物的影响[J]. 浙江师范大学学报(自然科学版), 2005, 28(3): 304-308
作者姓名:王芳  黄朝表  刘鹏  汪伟仙
作者单位:浙江师范大学,化学与生命科学学院,浙江,金华,321004
基金项目:浙江省自然科学基金,浙江省分析测试基金
摘    要:以2个大豆品种(浙春3号和华春18)为实验材料,用砂培方法研究了不同浓度铝处理后大豆根系分泌物的变化.通过研究铝对大豆电解质外渗率、根系分泌氨基酸和糖的影响,探讨了铝胁迫下植物根系的生理反应.结果表明,在铝胁迫条件下,电解质外渗率和糖类的泌出量随铝离子浓度的升高而增加;在低浓度铝离子作用下,随铝处理浓度的升高,氨基酸的分泌量也增加:浙春3号,苯丙氨酸和脯氨酸在ρ(Al3 )<20 mg/L时,丝氨酸、缬氨酸,精氨酸和氨基丙酸在ρ(Al3 )<40 mg/L时,色氨酸和赖氨酸在ρ(Al3 )<60 mg/L时,而酪氨酸和亮氨酸直至ρ(Al3 )为100 mg/L时才达最大值;华春18,丝氨酸和缬氨酸在ρ(Al3 )<20 mg/L时,色氨酸、精氨酸和氨基丙酸在ρ(Al3 )<40 mg/L时,苯丙氨酸、酪氨酸和赖氨酸在ρ(Al3 )<60 mg/L时,亮氨酸在ρ(Al3 )<80 mg/L时,脯氨酸至ρ(Al3 )为100 mg/L时达最大值.当铝处理浓度高于相应浓度时,氨基酸的种类随铝浓度的升高而减少.说明大豆通过改变根系分泌作用而缓解酸铝的毒害.

关 键 词:大豆    根系分泌物  电解质外渗率
文章编号:1001-5051(2005)03-0304-05
收稿时间:2004-10-21
修稿时间:2005-05-12

Effect of aluminum on soybean root exudates
WANG Fang,HUANG Chao-biao,LIU Peng,WANG Wei-xian. Effect of aluminum on soybean root exudates[J]. Journal of Zhejiang Normal University Natural Sciences, 2005, 28(3): 304-308
Authors:WANG Fang  HUANG Chao-biao  LIU Peng  WANG Wei-xian
Abstract:The effects of different concentration of aluminum on soybean(two varieties of soybean, Zhechun No. 3 and Huachun No. 18) root exudates were investigates with the methods of sand culture. The physiological and ecological responses of soybean root exudates to aluminum stress were discussed with investigating the effects of aluminum on exudation of electrolyte, sugar and amino acids. Results indicated that the exudation of electrolyte and soluble sugar increased with increase of aluminum treatment concentration. The change of exudation of amino acid was similar to the exudation of electrolyte and soluble sugar when the Al treatment concentration was low, but it was reverse while the Al treatment concentration was high. These results indicated that soybean could alleviate aluminum stress by changing root exudates.
Keywords:soybean(Glycine max)  aluminum  root exudates  exudation of electrolyte
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