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| 白三叶草/根瘤菌共生固氮潜力及干旱限制因素 | |
| 引用本文： | 李志芳,朱春茂,吴文良,隋新华.白三叶草/根瘤菌共生固氮潜力及干旱限制因素[J].农业环境科学学报,2009,28(3). |
| 作者姓名： | 李志芳 朱春茂 吴文良 隋新华 |
| 作者单位： | 1. 中国农业大学农学与生物技术学院,北京,100193 2. 中国农业大学资源与环境学院,北京,100193 3. 中国农业大学生物学院,北京,100193 |
| 摘 要： | 为了探讨白三叶草生物固氮与土壤水分供应和菌种基因型的关系,采用温室盆栽试验方法,对9个基因型的三叶草根瘤菌固氮效率和与土壤含水量的关系进行了研究.结果发现,根瘤菌接种后,白三叶草叶片含氮量明显增加,有3个基因型的根瘤菌接种植株后叶片氮含量达到对照的3倍以上,据此可根据根瘤菌的基因型来预测其同氮效率,共生固氮效率与根瘤菌基因型的关系较与分离宿主的关系更加密切.在中度干旱胁迫下,白三叶草植株地上部生物量积累所受影响较地下部所受影响更大,在白三叶草与根瘤菌共生体系建立过程中,当根瘤菌同定的氮素可以满足植株生长需要时,干旱胁迫可能成为生长的限制因子. |
| 关 键 词： | 共生固氮 干旱胁迫 白三叶草 根瘤菌基因型 |
Potential Capacity of Symbiosis Nitrogen Fixation of White Clover-Rhizobium Interaction and Drought Limiting Factor |
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| LI Zhi-fang,ZHU Chun-mao,WU Wen-liang,SUI Xin-hua.Potential Capacity of Symbiosis Nitrogen Fixation of White Clover-Rhizobium Interaction and Drought Limiting Factor[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2009,28(3). | |
| Authors: | LI Zhi-fang ZHU Chun-mao WU Wen-liang SUI Xin-hua |
| Institution: | 1.College of Agriculture and Biotechnology;China Agricultural University;Beijing 100193;China;2.College of Resources and Environmental Sciences;3.College of Biological Sciences;China |
| Abstract: | The interactions between white clove(rTrifolium repens L.)and Rhizobium strains were tested in order to identify the effectiveness of biological nitrogen fixation in relation to water supply, as well as the possibility to predict strain effectiveness according to genotype.Nine Rhizobium strains of R.trifolii were isolated from Trifolium repens L.and Trifolium fragiferum L.from different areas in southern China.White clove(rcv Reventel)was planted in pots, nodulated with the nine strains, and grown in a gree... |
| Keywords: | symbiosis nitrogen fixation drought stress white clover Rhizobium |
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