| Effects of endophytic fungi on drought stress tolerance of silage maize seedlings |
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| DOI：10.7606/j.issn.1000-7601.2022.06.05 |
| Key Words: endophytic fungi strong xerophytes silage maize seedling drought resistance |
| Author Name | Affiliation | | WANG Yingna | College of Biological Science and Engineering, North Minzu University
Key Laboratory of Ecological Protection of Agro\|pastoral Ecotones in the Yellow River Basin, National Ethnic Affairs Commission of the People’s Republic of China
Ningxia Key Laboratory of Microbial Resources Development and Applications in Special Environment, Yinchuan, Ningxia 750021, China | | WANG Jiawei | College of Biological Science and Engineering, North Minzu University
Key Laboratory of Ecological Protection of Agro\|pastoral Ecotones in the Yellow River Basin, National Ethnic Affairs Commission of the People’s Republic of China
Ningxia Key Laboratory of Microbial Resources Development and Applications in Special Environment, Yinchuan, Ningxia 750021, China | | XIA Yiting | College of Biological Science and Engineering, North Minzu University
Key Laboratory of Ecological Protection of Agro\|pastoral Ecotones in the Yellow River Basin, National Ethnic Affairs Commission of the People’s Republic of China
Ningxia Key Laboratory of Microbial Resources Development and Applications in Special Environment, Yinchuan, Ningxia 750021, China | | LIU Tao | College of Biological Science and Engineering, North Minzu University
Key Laboratory of Ecological Protection of Agro\|pastoral Ecotones in the Yellow River Basin, National Ethnic Affairs Commission of the People’s Republic of China
Ningxia Key Laboratory of Microbial Resources Development and Applications in Special Environment, Yinchuan, Ningxia 750021, China | | LI Lianhuan | College of Biological Science and Engineering, North Minzu University
Key Laboratory of Ecological Protection of Agro\|pastoral Ecotones in the Yellow River Basin, National Ethnic Affairs Commission of the People’s Republic of China
Ningxia Key Laboratory of Microbial Resources Development and Applications in Special Environment, Yinchuan, Ningxia 750021, China | | LIU Jianli | College of Biological Science and Engineering, North Minzu University
Key Laboratory of Ecological Protection of Agro\|pastoral Ecotones in the Yellow River Basin, National Ethnic Affairs Commission of the People’s Republic of China
Ningxia Key Laboratory of Microbial Resources Development and Applications in Special Environment, Yinchuan, Ningxia 750021, China | | KANG Peng | College of Biological Science and Engineering, North Minzu University
Key Laboratory of Ecological Protection of Agro\|pastoral Ecotones in the Yellow River Basin, National Ethnic Affairs Commission of the People’s Republic of China
Ningxia Key Laboratory of Microbial Resources Development and Applications in Special Environment, Yinchuan, Ningxia 750021, China | | LI Sufen | West Ordos National Nature Reserve Administration, Ordos, Inner Mongolia 014300, China |
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| Abstract: |
| To study the effects of endophytic fungi on growth of silage maize seedlings and obtain excellent strain enhancing the drought tolerance of silage maize seedlings, 8 strains of endophytic fungi isolated from the roots of three strong xerophytes (Tetraena mongolica、Ammopiptanthus mongolicus、Potaninia mongolica) planting in West Ordos and Piriformospora indica of model species of endophytic fungi were selected as test materials to inoculate into the roots of silage maize seedlings. After two weeks under severe drought stress simulated with PEG6000, the physiological and biochemical indexes of the seedlings were measured and the drought resistance coefficient was calculated. Then the effect of inoculating endophytic fungi on drought resistance of silage maize seedlings was evaluated using principal component analysis method. The results showed that all strains invaded the roots of silage maize seedlings to form symbiosis, but the infection rates were very different between different endophytic fungi strains. There were significant differences in 13 physiological indexes between non\|drought stressed and drought stressed group in the uninoculated plants (E-), such as aboveground fresh weight, leaf relative water content, chlorophyll content, root volume, root surface area, root fresh weight, root dry weight, root dry matter content, Pro content, MDA content, CAT activity, SOD activity and POD activity. The principal component analysis based on 13 physiological indexes demonstrated that only 4 endophytic fungi (Am04, Tm36, Tm02 and Piriformospora indica) improved the drought resistance of silage maize seedlings. The strains Am04 was the best. However, the other 5 endophytic fungi (Pm53, Tm30, Pm38, Pm06 and Pm57) did not improve the drought resistance of silage maize seedlings. There was no correlation between infection rate and most physiological indexes of drought resistance. Therefore, different endophytic fungi strains had different effects on the drought resistance of silage maize seedlings. The strain Am04 improved the drought resistance of silage maize seedlings better than others. |
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