Diversity of cultivable endophytic bacteria associated with halophytes in Xinjiang of China and their plant beneficial traits  

作　　者：LI Li GAO Lei LIU Yonghong FANG Baozhu HUANG Yin Osama A A MOHAMAD Dilfuza EGAMBERDIEVA LI Wenjun MA Jinbiao 

机构地区：[1]State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Faculty of Biology,National University of Uzbekistan,Tashkent 100174,Uzbekistan [4]State Key Laboratory of Biocontrol,Guangdong Provincial Key Laboratory of Plant Resources,School of Life Sciences,Sun Yat-Sen University,Guangzhou 510275,China

出　　处：《Journal of Arid Land》2021年第8期790-800,共11页干旱区科学（英文版）

基　　金：This research was supported by the Xinjiang Uygur Autonomous Region Regional Coordinated Innovation Project(Shanghai Cooperation Organization Science and Technology Partnership Program)(2020E01047);the National Natural Science Foundation of China(U1703106,32061143043,91751206);The authors acknowledge the anonymous reviewers for their constructive comments on the manuscript.

摘　　要：Endophytic bacteria from halophytes have a wide range of application prospects in various fields,such as plant growth-promoting,biocontrol activity and stress resistance.The current study aimed to identify cultivable endophytic bacteria associated with halophytes grown in the salt-affected soil in Xinjiang Uygur Autonomous Region,China and to evaluate their plant beneficial traits and enzyme-producing activity.Endophytic bacteria were isolated from Reaumuria soongorica(PalL Maxim.),Artemisia carvifolia(Buch.-Ham.ex Roxb.Hort.Beng.),Peganum harmala L.and Suaeda dendroides(C.A.Mey.Moq.)by using the cultural-dependent method.Then we classified these bacteria based on the difference between their sequences of 16S rRNA(16S ribosomal RNA)gene.Results showed that the isolated bacteria from R.soongorica belonged to the genera Brucella,Bacillus and Variovorax.The bacteria from A.carvifolia belonged to the genera Micromonospora and Brucella.The bacteria from P.harmala belonged to the genera Paramesorhizobium,Bacillus and Peribacillus.The bacteria from S.dendroides belonged to the genus Bacillus.Notably,the genus Bacillus was detected in the three above plants,indicating that Bacillus is a common taxon of endophytic bacteria in halophytes.And,our results found that about 37.50%of the tested strains showed strong protease-producing activity,6.25%of the tested strains showed strong cellulase-producing activity and 12.50%of the tested strains showed moderate lipase-producing activity.Besides,all isolated strains were positive for IAA(3-Indoleacetic acid)production,31.25%of isolated strains exhibited a moderate phosphate solubilization activity and 50.00%of isolated strains exhibited a weak siderophore production activity.Our findings suggest that halophytes are valuable resources for identifying microbes with the ability to increase host plant growth and health in salt-affected soils.

关 键 词：ENDOPHYTES environmental microbiology HALOPHYTES BIODIVERSITY plant beneficial properties 

分 类 号：Q939.9[生物学—微生物学]