芽孢杆菌bclrb2:一株高效重氮营养耐盐PGPB菌株

A. H. Brahim, Daoued Lobna, J. Mouna, Akremi Asmahen, Hmani Houda, B. Manel, Naser Aliye Feto, Samir Bejr, Mamdouh Ben Ali
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引用次数: 2

摘要

需要新的农业技术来改善盐碱地和干燥土壤的粮食生产。根据农民注意到在橄榄树行间种植的小麦生长良好,植物病原感染发生率降低的发现,我们筛选了与橄榄树相关的重氮营养内生菌PGPB,以提高植物耐胁迫能力。通过对植物生长促进活性的生化表征,如抑菌能力、固氮能力、ACC脱氨酶能力、生长激素能力、磷酸盐增溶能力等进行筛选,结果表明BCLRB2对大气氮的固定能力最有效,而大气氮是逆境环境下植物生长参数中最重要的因子。菌株BCLRB2,鉴定为芽孢杆菌sp,具有ACC脱氨酶,在体外具有高度的刺激作用,与高产水解酶、AIA和磷酸三钙的增溶有关。研究了BCLRB2菌株在盆栽植物体内的生长效率。结果表明,在盐胁迫和自然条件下,接种BCLRB2芽孢杆菌的硬粒小麦幼苗的生长情况优于对照。接种植株的总长度、鲜重和总干重均显著高于未接种植株。bclrb2是一种高效的重氮耐盐芽孢杆菌
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bacillus sp.BCLRB2: An efficient diazotrophic Halotolerant PGPB strain
Novel agricultural technologies are required to improve food production in saline and dry soils. Based on a finding made by farmers who noticed a good growth and a reduced incidence of phytopathogenic infections of wheat grown between the rows of olive trees, we have screened diazotrophic endophytic PGPB associated with olive tree for plant stress tolerance improving capability. Strains were selected following a biochemical characterization of plant growth promotion activities such as ability of antimicrobial production, azote fixation, ACC deaminase production, growth hormone production, Phosphate solubilization… Among the selected strains, BCLRB2 was the strain that shown the most efficient capacity to fix atmospheric nitrogen, which is the most prominent factor of all plant growth parameters under stressful environments. The strain BCLRB2, identified as Bacillus sp, had ACC deaminase, and highly stimulatory effect in vitro associated with high production of hydrolytic enzymes, AIA, and solubilization of tricalcium phosphate. The efficiency of BCLRB2 strain was explored for in vivo pot plant growth. As a result, inoculated plants with Bacillus sp. BCLRB2, showed the best growth of durum wheat seedlings compared to a control under salt stress and natural conditions. Total length, fresh weight, and total dry weight were significantly higher in inoculated plants compared to uninoculated ones. The Bacillus sp.BCLRB2 is approved to be an efficient diazotrophic Halotolerant PGPB strain
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