| 低pH对苜蓿共生结瘤与生长的影响研究 |
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| 引用本文： | 杨敏,陈秀虎,黎晓峰,玉永雄. 低pH对苜蓿共生结瘤与生长的影响研究[J]. 江西农业学报, 2007, 19(7): 68-70,73 |
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| 作者姓名： | 杨敏 陈秀虎 黎晓峰 玉永雄 |
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| 作者单位： | 清远职业技术学院,生物系,广东,清远,511510;广西大学,农学院,广西,南宁,530005;广西大学,农学院,广西,南宁,530005;清远职业技术学院,生物系,广东,清远,511510;西南大学,动物科技学院,重庆,北碚,400716 |
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| 基金项目： | 广西自然科学基金(桂科自0339007)，国家“973”资助项目(2001CB108905)，国家自然科学基金项目(30360048)，教育部优秀青年教师资助计划(2003[355]) |
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| 摘 要： | 研究了低pH条件对苜蓿生长和结瘤的影响。结果表明:与对照(pH6.5)相比,pH4.5处理极显著地抑制苜蓿初生根的伸长和根瘤菌Rhizobium meliloti的生长,进而抑制共生结瘤和苜蓿植株的生长。低pH并不直接影响苜蓿根毛变形,导致根毛变形率下降的根本原因在于根瘤菌受到低pH抑制。
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| 关 键 词： | 低pH 结瘤 根毛变形 结瘤因子 苜蓿 生长 |
| 文章编号： | 1001-8581（2007）07-0068-03 |
| 收稿时间： | 2007-05-15 |
| 修稿时间： | 2007-05-15 |
Study on Effects of Low pH on Nodulation and Growth of Medicago sativa L. |
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| YANG Min,CHEN Xiu-hu,LI Xiao-feng,YU Yong-xiong. Study on Effects of Low pH on Nodulation and Growth of Medicago sativa L.[J]. Acta Agriculturae Jiangxi, 2007, 19(7): 68-70,73 |
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| Authors: | YANG Min CHEN Xiu-hu LI Xiao-feng YU Yong-xiong |
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| Affiliation: | 1. Department of Biology, Qingyuan Polytechnic College, Qingynan 511510, China; 2. Faculty of Agriculture, Guangxi University, Nanning 530005, China; 3. Faculty of Zoological Science and Technology, South- west University, Chongqing 400716, China |
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| Abstract: | The effects of low pH on the nodulation and growth of Medicago sativa L.were discussed in the study.The results showed that compared with the pH of 6.5,under pH 4.5 the primary root and rhizobium were obviously prevented to grow,and then to inhibit the growth of the nodulation and alfalfa.The low pH had no direct influence on the deformation of the root hair of Medicago sativa L,but it prevented the growth of the rhizobium and led to the root hair deformation. |
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| Keywords: | Low pH Nodulation Root hair deformation(RHD) Nod factor(NF) Medicago sativa L.(alfalfa) |
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