| 祁娟,王婷,白小明,焦婷,马国珍,杨英东,何凌峰.不同根瘤菌菌株对盐胁迫下甘农9号苜蓿生长及生理特性的影响[J].干旱地区农业研究,2018,36(3):168~175 |
| 不同根瘤菌菌株对盐胁迫下甘农9号苜蓿生长及生理特性的影响 |
| Effects of different rhizobia strains on the growth and physiological characteristic of Medicago sativa L. Gannong No. 9 under salt stress |
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| DOI：10.7606/j.issn.1000-7601.2018.03.26 |
| 中文关键词: 根瘤菌 苜蓿 匹配 抗盐性 |
| 英文关键词:rhizobium alfalfa matching salt resistance |
| 基金项目:公益性行业(农业)科研专项(201403048-8)；国家牧草产业技术体系（CARS-34）；国家自然科学基金（31660684） |
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| 中文摘要: |
| 以已筛选的与甘农9号苜蓿匹配效果较好的5株根瘤菌株为研究对象，研究不同浓度NaCl（0、0.4%、0.8%、1.2%）胁迫下，不同根瘤菌株对甘农9号苜蓿生长及生理特性的影响。研究结果表明，在非接菌情况下，随NaCl浓度提高，对苜蓿的生长抑制作用增大，而接菌以后，不同菌株均通过其固氮作用、根瘤菌与苜蓿共生对其生长及生理应答特性的改变来提高苜蓿抗盐胁迫的能力。但是不同菌株与苜蓿匹配对盐的耐受程度不一。经隶属函数综合分析表明，非盐胁迫下，接菌后，对苜蓿生长及生理特性影响较明显的菌株是Da99、DL58及QL31B，而菌株Ga66、Wa32 与对照比较差异不显著；在不同盐胁迫处理下，所有菌株相比对照都明显促进苜蓿的生长及提高其抗盐性。在0.4%盐浓度下与甘农9号苜蓿匹配效应最好的菌种是Ga66、QL31B，其隶属函数值较对照分别提高了53.8%和58.6%；在0.8%盐浓度下所有参试菌株均与甘农9号苜蓿匹配效应较好；在1.2%盐浓度下与甘农9号苜蓿匹配效应最好的菌种是Ga66、QL31B；在任何盐浓度下与甘农9号苜蓿匹配效应均好的菌种是QL31B。 |
| 英文摘要: |
| Using the selected strains which matched well with the Medicago sativa Gannong 9 as the research subjects, the effects of the selected strains on plant growth and physiological response were studied under different NaCl treatments (0、0.4%、0.8%、1.2%). The results showed that the alfalfa growth was inhibited significantly by the increasing NaCl concentration. Different rhizobia strains were able to increase the salt resistance of alfalfa by nitrogen fixation, rhizobia symbiosis, maintaining the plant growth and physiological response characteristics. However, different strains-alfalfa match had different tolerance to salt stress. According to the comprehensive analysis of membership function, the strains of Da99, DL58 and QL31B matched better with Medicago sativa Gannong No. 9 with no salt treatment, while there were no significant difference between strains of Ga66, Wa32 and CK. All strains could significantly improve the growth and salt tolerance of alfalfa under different salt stress treatments. Medicago sativa Gannong No.9 matched better with strains of Ga66 and QL31B under 0.4 % NaCl, and the value of membership function increased about 53.8% and 58.6% than CK, respectively. All the strains tested could promote growth and improve salt-resistance better under 0.8% NaCl, and strains of Ga66 and QL31B could promote growth and improve salt-resistance better under 1.2% salt concentration. Comprehensively evaluation indicated that strain QL31B had better match with Medicago sativa Gannong No. 9 on growth and salt tolerance under 0~1.2% salt concentrations. |
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