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Halophile plant growth-promoting rhizobacteria induce salt tolerance traits in wheat seedlings(Triticum aestivum L.)

引用

Pedosphere 2020年第5期30卷 684-693页

作者： Maryam SAFDARIAN Hossein ASKARl ghorbanali nematzadeh Adriano SOFO Sari Agricultural Sciences and Natural Resources University Mazandaran ProvinceSari ***(Iran) Department of Biotechnology Faculty of New Technologies and Energy EngineeringShahid Beheshti UniversityTehran 198396941(Iran) Department of European and Mediterranean Cultures:Architecture EnvironmentCultural Heritage(DiCEM)Universita degli Studi dello BasilicataVia Lanera 20Matera 75100(Italy)

Salinity is one of the most important growth-limiting factors for most crops in arid and semi-arid regions;however,the use of plant growth-promoting rhizobacteria isolated from saline soils could reduce the effects of saline stress in *** study aimed to evaluate the efficiency of plant growth-promoting rhizobacteria(PGPRs),isolated from the rhizosphere of halophile plants,for the growth,Na^+/K^+balance,ethylene emission,and gene expression of wheat seedlings{Triticum aestivum L.)grown under saline conditions(100 mmol L^-1 NaCl)for 14 d.A total of 118 isolates obtained from saline soils of the deserts of Iran were tested for their capacity as *** of the 118 isolates,17 could solubilize phosphate(Ca3(P〇4)2),5 could produce siderophores,and 16 could synthesize indole-3-acetic ***,PGPRs were also evaluated for aminocyclopropane-l-carboxylate deaminase activity.A pot experiment was conducted to evaluate the ability of 28 PGPR isolates to promote growth,regulate Na^+/K^+balance,and decrease ethylene emissions in *** most efficient PGPRs were Arthrobacter *** atrophaeus,Enterobacter ashuriae,and Pseudomonas *** expression analysis revealed the up-regulation of H^+-PPase,HKT1,NHX7,CAT,and APX expression in roots of Enterobacter-inocuVdied salt-stressed ***-tolerant rhizobacteria exhibiting plant growth-promoting traits can facilitate the growth of wheat plants under saline *** results indicate that the isolation of these bacteria may be useful for formulating new inoculants to improve wheat cropping systems in saline soils.

关键词： ethylene emission gene expression growth-promoting trait indole-3-acetic acid phosphate solubility saline soil siderophore

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