| 内生真菌侵染对野大麦根际土壤化学特性和微生物群落的影响 |
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| 引用本文： | 金媛媛,BOWATTE Saman,贾倩民,侯扶江,李春杰.内生真菌侵染对野大麦根际土壤化学特性和微生物群落的影响[J].草业学报,2019,28(10):66-77. |
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| 作者姓名： | 金媛媛 BOWATTE Saman 贾倩民 侯扶江 李春杰 |
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| 作者单位： | 兰州大学草地农业生态系统国家重点实验室,兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业科技学院,甘肃 兰州 730020;兰州大学草地农业生态系统国家重点实验室,兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业科技学院,甘肃 兰州 730020;兰州大学草地农业生态系统国家重点实验室,兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业科技学院,甘肃 兰州 730020;兰州大学草地农业生态系统国家重点实验室,兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业科技学院,甘肃 兰州 730020;兰州大学草地农业生态系统国家重点实验室,兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业科技学院,甘肃 兰州 730020 |
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| 基金项目： | 中央高校基本科研业务费专项资金自由探索项目(lzujbky-2017-ot21)资助 |
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| 摘 要： | 以Epichloё bromicola内生真菌侵染野大麦形成的带菌(E+)和不带菌(E-)植株为研究材料,将其种植在从甘肃玛曲、榆中和临泽采集的土壤中,温室培养8个月。分析在不同土壤中种植3、6和8个月后,E+和E-植物的地上干重;及植物建立后6和8个月的土壤碳、氮、磷、pH、细菌丰度、真菌丰度、土壤氮循环中涉及的关键细菌,旨在探究内生真菌侵染野大麦对宿主生境土壤的影响。结果表明:不同土壤中内生真菌的存在显著提高了野大麦的干物质量;相同带菌情况下(E+或E-),临泽土壤中干物质量最高,玛曲土壤中干物质量最低;三种土壤中E+植物的干物质量两两间差异显著,而在榆中和玛曲土壤中E-植物的干物质量差异不显著。内生真菌侵染显著增加了土壤全氮含量和氨氧化细菌的丰度。内生真菌对土壤总碳、微生物生物量碳、pH、细菌、真菌、反硝化细菌和氧化亚氮还原菌丰度的影响因土壤类型和植物生长时间的不同而存在差异。内生真菌对土壤总磷含量无显著影响,但各土壤类型之间差异显著,且随植物生长时间的延长而显著变化。证实,Epichloё bromicola内生真菌侵染对野大麦生境土壤化学和微生物特性的影响与土壤类型密切相关,且随着宿主植物生长时间的延长发生显著变化。因此,建议内生真菌对土壤的影响需长期实地研究,这有助于深刻理解驱动土壤性质变化的机制。
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| 关 键 词： | 野大麦 内生真菌 土壤微生物 |
| 收稿时间： | 2018-10-10 |
| 修稿时间： | 2019-02-25 |
Effects of Epichloё endophytic fungi infection in wild barley (Hordeum brevisubulatum) on soil chemical properties and the soil microbial community |
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| JIN Yuan-yuan,BOWATTE Saman,JIA Qian-min,HOU Fu-jiang,LI Chun-jie.Effects of Epichloё endophytic fungi infection in wild barley (Hordeum brevisubulatum) on soil chemical properties and the soil microbial community[J].Acta Prataculturae Sinica,2019,28(10):66-77. |
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| Authors: | JIN Yuan-yuan BOWATTE Saman JIA Qian-min HOU Fu-jiang LI Chun-jie |
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| Institution: | State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China |
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| Abstract: | An 8-month greenhouse study was conducted to investigate the belowground effects of infection of wild barley by the foliar endophyte Epichloё bromicola. The effects of endophyte infection status (E+: endophyte infected; E-: endophyte free) on soil chemical and microbiological properties were tested in three soils collected from Maqu, Yuzhong, and Linze in Gansu province, China. We measured the dry matter production of plants at 3, 6, and 8 months after establishment. The soil carbon, nitrogen, and phosphorous contents, pH, and the abundance of bacteria, fungi, and key bacteria involved in the soil nitrogen cycle were determined at 6 and 8 months after plant establishment. The dry matter production of wild barley was significantly higher in E+ plants than in E- plants in all three soils. Irrespective of endophyte status, the dry matter production was highest in Linze soils and lowest in Maqu soils. The presence of the endophyte significantly increased soil total nitrogen content and the abundance of ammonia-oxidizing bacteria. The effects of endophyte status on total soil carbon, microbial biomass carbon, pH, abundance of bacteria, fungi, denitrifying bacteria, and nitrous oxide-reducing bacteria varied with soil type and plant age. The total phosphorus content in soil varied significantly with soil type and plant age but not with endophyte status. These results confirmed that E. bromicola infection of wild barley influences the chemical and microbiological properties of soil in a soil type- and plant age-dependent manner. We suggest that long-term field studies in the future would be beneficial for understanding the mechanisms driving these observed changes in soil properties. |
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| Keywords: | wild barley endophytic fungi soil microbes |
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