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Culturable Screening of Plant Growth-Promoting and Biocontrol Bacteria in the Rhizosphere and Phyllosphere of Wild Rice

文献类型： 外文期刊

作者： Yao, Zongmu 1 ; Chen, Yalin 1 ; Luo, Shouyang 1 ; Wang, Jilin 3 ; Zhang, Jiafan 1 ; Zhang, Jianfeng 2 ; Tian, Chunjie 1 ; Tian, Lei 1 ;

作者机构： 1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Mollisols Agroecol, Changchun 130102, Peoples R China

2.Jilin Agr Univ, Coll Life Sci, Key Lab Straw Biol & Utilizat, Minist Educ, Changchun 130118, Peoples R China

3.Jiangxi Acad Agr Sci, Natl Engn Res Ctr Rice, Rice Res Inst, Nanchang 330200, Jiangxi, Peoples R China

关键词： wild rice; rhizosphere microorganisms; biocontrol bacteria; growth-promoting bacteria

期刊名称：MICROORGANISMS （ 影响因子：4.926； 五年影响因子：5.143 ）

ISSN：

年卷期： 2022 年 10 卷 7 期

页码：

收录情况： SCI

摘要： Wild rice is an important improved resource for cultivated rice and its unique ability to resist biotic and abiotic stress has attracted the attention of many scholars. The microbial community structure in the rhizosphere and leaf area of different rice varieties is also different, which may be one of the reasons for the difference in stress resistance between wild rice and cultivated rice. Forty-six bacteria were screened from the rhizosphere and phyllospheric of four different wild rice varieties. The results of functions of the screened strains showed that 18 strains had a good inhibitory effect on rice blast, and 33 strains had the ability to dissolve phosphorus, potassium, or fix nitrogen. Through potted experiment, the three bacterial strains, 499G2 (Peribacillus simplex), 499G3 (Bacillus velezensis), and 499G4 (B. megaterium) have a positive effect on the growth of cultivated rice in addition to the resistance to rice blast. The contents of total nitrogen, total phosphorus, total potassium, indole acetic acid (IAA), and chlorophyll in plant leaves were increased. In addition, in the verification test of rice blast infection, the application of inoculants can significantly reduce the content of malondialdehyde (MDA), increase the content of soluble sugar, and increase the activity of plant antioxidant enzymes, which may thereby improve rice in resisting to rice blast.

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