文献类型： 外文期刊

作者： Sharma, Anjney ¹ ; Singh, Rajesh Kumar ¹ ; Singh, Pratiksha ¹ ; Vaishnav, Anukool ³ ; Guo, Dao-Jun ¹ ; Verma, Krishan K. ¹ ; Li, Dong-Ping ⁵ ; Song, Xiu-Peng ² ; Malviya, Mukesh Kumar ¹ ; Khan, Naeem ⁶ ; Lakshmanan, Prakash ¹ ; Li, Yang-Rui ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Guangxi Acad Agr Sci, Key Lab Sugarcane Biotechnol & Genet Improvement, Sugarcane Res Ctr,Sugarcane Res Inst,Minist Agr, Nanning 530007, Peoples R China

2.Guangxi Key Lab Crop Genet Improvement & Biotech, Nanning 530007, Peoples R China

3.GLA Univ, Dept Biotechnol, Mathura 281406, Uttar Pradesh, India

4.Guangxi Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop, Agro Bioresources, Nanning 530005, Peoples R China

5.Guangxi Acad Agr Sci, Inst Microbiol, Nanning 530007, Peoples R China

6.Univ Florida, Inst Food & Agr Sci, Dept Agron, Gainesville, FL 32611 USA

7.Southwest Univ, Coll Resources & Environm, Interdisciplinary Res Ctr Agr Green Dev Yangtze R, Chongqing 400715, Peoples R China

8.Univ Queensland, Queensland Alliance Agr & Food Innovat, St Lucia, Qld 4072, Australia

关键词： soil salinity; PGPR; sodium nitroprusside; synergistic effects; reactive oxygen species; antioxidant enzyme; sustainable agricultural production

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

ISSN：

年卷期： 2021 年 9 卷 11 期

页码：

收录情况： SCI

摘要： Soil salinity causes severe environmental stress that affects agriculture production and food security throughout the world. Salt-tolerant plant-growth-promoting rhizobacteria (PGPR) and nitric oxide (NO), a distinctive signaling molecule, can synergistically assist in the alleviation of abiotic stresses and plant growth promotion, but the mechanism by which this happens is still not well known. In the present study, in a potential salt-tolerant rhizobacteria strain, ASN-1, growth up to 15% NaCl concentration was achieved with sugarcane rhizosphere soil. Based on 16S-rRNA gene sequencing analysis, the strain ASN-1 was identified as a Bacillus xiamenensis. Strain ASN-1 exhibits multiple plant-growth-promoting attributes, such as the production of indole-3-acetic acid, 1-aminocyclopropane-1-carboxylate deaminase, siderophores, HCN, ammonia, and exopolysaccharides as well as solubilized phosphate solubilization. Biofilm formation showed that NO enhanced the biofilm and root colonization capacity of the PGPR strain ASN-1 with host plants, evidenced by scanning electron microscopy. The greenhouse study showed that, among the different treatments, the combined application of PGPR and sodium nitroprusside (SNP) as an NO donor significantly (p <= 0.05) enhanced sugarcane plant growth by maintaining the relative water content, electrolyte leakage, gas exchange parameters, osmolytes, and Na+/K+ ratio. Furthermore, PGPR and SNP fertilization reduced the salinity-induced oxidative stress in plants by modulating the antioxidant enzyme activities and stress-related gene expression. Thus, it is believed that the acquisition of advanced information about the synergistic effect of salt-tolerant PGPR and NO fertilization will reduce the use of harmful chemicals and aid in eco-friendly sustainable agricultural production under salt stress conditions.