Microbial Ecology of Saline Ecosystems

Sultanpuram, Vishnuvardhan Reddy; Mothe, Thirumala

doi:10.1007/978-3-030-18975-4_3

Cited by 4 publications

(3 citation statements)

References 136 publications

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“…Microbial forms of life can be found over a vast range of salt concentrations. Furthermore, these organisms cope with hyperosmotic stress by utilizing various strategies [ 41 ] to mitigate salinity and boost the efficiency of plants [ 9 ]. Among bacteria, the genera bacilli and pseudomonas are two of the most critical and common plant growth promoters [ 9 , 19 , 21 , 24 , 30 ].…”

Section: Discussionmentioning

confidence: 99%

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

2022

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Maize (Zea mays) growth performance has been hindered due to the high soil salinity. Salinity is one of the most severe abiotic stresses that has led to growth imbalance and profitability of harvests in arid and semi-arid regions. Plants have taken advantage of salt-tolerant bacteria as plant growth-promoters to enhance growth and reduce the adverse effects of salinity through the regulation of some biochemical, physiological, and molecular features. Preferences for non-chemical, eco-friendly, and economical approaches have caused the inquiry of the Bacillus genus as a joint group of plant growth-promoting rhizobacteria known to alleviate salt-stress impacts. In the present study, halotolerant Bacillus strains were isolated from salt-marshland soil and characterized for their physiological, molecular, and biochemical properties. Twenty-four bacterial isolates collected from high saline fields of salt marshland were analyzed by MALDI-TOF MS proteome analysis, which confirmed the taxonomic affiliation with Bacillus cereus, Bacillus subtilis, Bacillus atrophaeus, and Bacillus thorngiensis. Applying the isolates on maize plants as bio-inoculant bacteria obviously increased the growth parameters (P < 0.01). Pot experiments showed that isolates 74 and 90 were the most prominent strains to minimize the harmful effects of salinity. Its effects are heightening the potassium/sodium ratio and K-Na selectivity in shoots and roots measured by flame atomic absorption photometry (AAS). Accordingly, Bacillus cereus isolate 74 showed a maximum increase in dry weights of the shoot (133.89%), root (237.08%), length of the shoot (125%), and root (119.44%) compared to the control condition. Our findings suggest that bacteria isolated from marshland may be an economical and simple means to increase plant growth and resistance to high salinity soil conditions.

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Section: Discussionmentioning

confidence: 99%

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

2022

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“…Moreover, different microbial species have specific salt requirements and possess varying tolerance levels. Based on their ability to grow in the saline environments, microbes can be grouped as halotolerant (tolerate up to 25% NaCl) and halophilic (require salt for growth) (Sultanpuram and Mothe 2019). Bacterial and fungal endophytes of S. europaea are classified halotolerant as experimentally tested by Szymańska et al (2016Szymańska et al ( , 2018 and Furtado et al (2019b).…”

Section: S Europaea As a Reservoir Of Specialized Endophytic Diversitymentioning

confidence: 99%

Rhizobium Presence and Functions in Microbiomes of Non-leguminous Plants

Díez-Méndez

Menéndez

2020

Soil Biology

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The Springer series Soil Biology publishes topical volumes in the fields of microbiology, environmental sciences, plant sciences, biotechnology, biochemistry, microbial ecology, mycology and agricultural sciences.Special emphasis is placed on methodological chapters or volumes. This includes coverage of new molecular techniques relevant to soil biology research or to monitoring and assessing soil quality as well as advanced biotechnological applications. Leading international authorities with a background in academia, industry or government will contribute to the series as authors or editors.

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“…Salinity has been considered as an interesting environmental filter for advancing microbial ecology (Sultanpuram & Mothe, 2019). The most representative habitat is the marine environment, which has different microbial communities from freshwater environments (Sun et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Succession and assembly mechanisms of seawater prokaryotic communities along an extremely wide salinity gradient

Guan

Zhao

Jiang

et al. 2023

Environ Microbiol Rep

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Salinity is an important environmental factor in microbial ecology for affecting the microbial communities in diverse environments. Understanding the salinity adaptation mechanisms of a microbial community is a significant issue, while most previous studies only covered a narrow salinity range. Here, variations in seawater prokaryotic communities during the whole salt drying progression (salinity from 3% to 25%) were investigated. According to high‐throughput sequencing results, the diversity, composition, and function of seawater prokaryotic communities varied significantly along the salinity gradient, expressing as decreased diversity, enrichment of some halophilic archaea, and powerful nitrate reduction in samples with high salt concentrations. More importantly, a sudden and dramatic alteration of prokaryotic communities was observed when salinity reached 16%, which was recognized as the change point. Combined with the results of network analysis, we found the increasing of complexity but decreasing of stability in prokaryotic communities when salinity exceeded the change point. Moreover, prokaryotic communities became more deterministic when salinity exceeded the change point due to the niche adaptation of halophilic species. Our study showed that substantial variations in seawater prokaryotic communities along an extremely wide salinity gradient, and also explored the underlying mechanisms regulating these changes.

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Microbial Ecology of Saline Ecosystems

Cited by 4 publications

References 136 publications

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

Rhizobium Presence and Functions in Microbiomes of Non-leguminous Plants

Succession and assembly mechanisms of seawater prokaryotic communities along an extremely wide salinity gradient

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