Alleviation of the adverse effect of salinity stress by inoculation of plant growth promoting rhizobacteria isolated from hot humid tropical climate

Kumar, Krishna; Amaresan, N.; Madhuri, K.

doi:10.1016/j.ecoleng.2017.02.023

Cited by 53 publications

(19 citation statements)

References 33 publications

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“…The utilization of plant growth-promoting microbes for stress tolerance is an ideal and eco-friendly strategy [29]. To date, several studies have been carried out, in which PGPR were utilized for their potent role in salinity stress mitigation [27, 34–37].…”

Section: Discussionmentioning

confidence: 99%

Indole-3-acetic-acid and ACC deaminase producing Leclercia adecarboxylata MO1 improves Solanum lycopersicum L. growth and salinity stress tolerance by endogenous secondary metabolites regulation

et al. 2019

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Background The utilization of plant growth-promoting microbes is an environment friendly strategy to counteract stressful condition and encourage plants tolerance. In this regards, the current study was designed to isolate ACC deaminase and indole-3-acetic acid (IAA) producing halotolerant bacteria to promote tomato ( Solanum lycopersicum L.) growth and tolerance against salinity stress. Results The selected bacterial isolate MO1 was identified as Leclercia adecarboxylata and IAA quantification results revealed that MO1 produced significant amount of IAA (9.815 ± 0.6293 μg mL − 1 ). The MO1 showed the presence of ACC (1-Aminocyclopropane-1-Carboxylate) deaminase responsible acdS gene and tolerance against salinity stress. A plant microbe interaction experiment using tomato ( Solanum lycopersicum L.) with glycine betaine (GB) as a positive control was carried out to investigate the positive role MO1 in improving plant growth and stress tolerance. The results indicated that MO1 inoculation and GB application significantly increased growth attributes under normal as well as saline condition (120 mM NaCl). The MO1 inoculation and GB treatment approach conferred good protection against salinity stress by significantly improving glucose by 17.57 and 18.76%, sucrose by 34.2 and 12.49%, fructose by 19.9 and 10.9%, citric acid by 47.48 and 34.57%, malic acid by 52.19 and 28.38%, serine by 43.78 and 69.42%, glycine by 14.48 and 22.76%, methionine by 100 and 124.99%, threonine by 70 and 63.08%, and proline by 36.92 and 48.38%, respectively, while under normal conditions MO1 inoculation and GB treatment also enhanced glucose by 19.83 and 13.19%, sucrose by 23.43 and 15.75%, fructose by 15.79 and 8.18%, citric acid by 43.26 and 33.14%, malic acid by 36.18 and 14.48%, serine by 46.5 and 48.55%, glycine by 19.85 and 29.77%, methionine by 22.22 and 38.89%, threonine by 21.95 and 17.07%, and proline by 29.61 and 34.68% compared to levels in non-treated plants, respectively. In addition, the endogenous abscisic acid (ABA) level was noticeably lower in MO1-inoculated (30.28 and 30.04%) and GB-treated plants (45 and 35.35%) compared to their corresponding control plants under normal condition as well as salinity stress, respectively. Conclusion The current findings suggest that the IAA- and ACC-deaminase-producing abilities MO1 can improve plants tolerance to salinity stress. Electronic supplementary material The online version of this article (10.1186/s12866-019-1450-6) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Indole-3-acetic-acid and ACC deaminase producing Leclercia adecarboxylata MO1 improves Solanum lycopersicum L. growth and salinity stress tolerance by endogenous secondary metabolites regulation

et al. 2019

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“…Lysinibacillus spp. were also reported to enhance plant tolerance to different abiotic stresses and improve plant growth under adverse stress conditions [86,87,92]. Salinity is one of the major problems affecting crop production worldwide [101].…”

Section: Plant Growth Promotion By Lysinibacillus Sppmentioning

confidence: 99%

“…Salinity is one of the major problems affecting crop production worldwide [101]. Kumar et al [87] reported that seed bacterization with salt-tolerant Lysinibacillus sp. effectively enhanced the growth of rice seedlings under salinity stress.…”

Section: Plant Growth Promotion By Lysinibacillus Sppmentioning

confidence: 99%

<i>Lysinibacillus</i> Species: Their Potential as Effective Bioremediation, Biostimulant, and Biocontrol Agents

Nusrat

Shimizu

2021

RAS

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The use of synthetic chemicals has increased drastically due to industrialization and urbanization. However, the long-term and indiscriminate use of these chemicals has a negative impact on environment and human health; thus, public concerns about the hazardous effects of such synthetic chemicals are increasing day by day. To solve these problems, the exploitation of potential alternatives has become a major challenge, and the admiration of beneficial microbes is increasing due to their safe and environment-friendly nature. Microbes can mitigate the hazardous effects of synthetic chemicals by reducing their use and toxicity. Lysinibacillus species are gram-positive, spore-forming, motile bacteria. This genus was previously designated as Bacillus spp. under the family Bacillaceae of the phylum Firmicutes. For a long period of time, Lysinibacillus is well-known for its insecticidal activity against various insects, including mosquitoes, which are the vector of several human diseases. In addition, some Lysinibacillus species have a potential for heavy metal remediation. In recent years, Lysinibacillus spp. are attracting the researchers' attention as plant growth-promoting and disease control agents, which would be used as alternatives to agrochemicals. This study gives an overview of the entomopathogenic, bioremediation, plant growth-promoting, and biological disease control abilities of the genus Lysinibacillus.

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“…This strategy has recently gained relevance with the development of a new generation of gene sequencing techniques, which have allowed the assessment of microbe-plant relationships and the development of a new evolutionary model, the holobiontic theory (Rosenberg and Zilber-Rosenberg, 2016). This model proposes that microbiota would evolve over time to improve the fitness of the plant under changing environmental conditions such as drought, salinity, nutrient deficiency, or soil contamination (Murphy et al, 2015;Fidalgo et al, 2016;Soussi et al, 2016;Kumar et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Culturable Bacterial Endophytes From Sedimentary Humic Acid-Treated Plants

et al. 2020

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The global decrease in soil fertility leads to a new agricultural scenario where ecofriendly solutions play an important role. The plant growth promotion through the use of microbes, especially endophytes and rhizosphere microbiota, has been proposed as a useful solution. Several studies have shown that humic substances are suitable vehicles for the inoculation of plant growth promoting bacteria, and that this combination has an enhanced effect on the stimulation of plant development. In this work, cucumber plants grown hydroponically have been pre-treated with a sedimentary humic acid (SHA) with known plant growth-enhancing effects, and culturable bacterial endophytes have been isolated from these plants. The hypothesis was that this pre-treatment with SHA could lead to the isolation of certain endophytic taxa whose proliferation within the plant could have been promoted as a result of the effects of the treatment with SHA, and that could eventually reinforce a potential synergistic effect of a combined application of those endophytic bacteria and SHA. The culturable endophytes that have been isolated from humic acid-treated cucumber plants have been identified as members of four main phyla: Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes. Isolates were characterized according to the following plant growth-promoting traits: nitrogen fixation/scavenging, phosphate solubilization, siderophore production and plant hormone production. Most of the isolates were able to fix/scavenge nitrogen and to produce plant hormones (indole-3-acetic acid and several cytokinins), whereas few isolates were able to solubilize phosphate and/or produce siderophores. The most promising endophyte isolates for its use in futures investigations as plant growthpromoting bacterial inocula were Pseudomonas sp. strains (that showed all traits), Sphingomonas sp., Stenotrophomonas sp. strains, or some Arthrobacter sp. and Microbacterium sp. isolates.

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Alleviation of the adverse effect of salinity stress by inoculation of plant growth promoting rhizobacteria isolated from hot humid tropical climate

Cited by 53 publications

References 33 publications

Indole-3-acetic-acid and ACC deaminase producing Leclercia adecarboxylata MO1 improves Solanum lycopersicum L. growth and salinity stress tolerance by endogenous secondary metabolites regulation

Indole-3-acetic-acid and ACC deaminase producing Leclercia adecarboxylata MO1 improves Solanum lycopersicum L. growth and salinity stress tolerance by endogenous secondary metabolites regulation

<i>Lysinibacillus</i> Species: Their Potential as Effective Bioremediation, Biostimulant, and Biocontrol Agents

Culturable Bacterial Endophytes From Sedimentary Humic Acid-Treated Plants

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