Enhancement of growth and salt tolerance of tomato seedlings by a natural halotolerant actinobacterium Glutamicibacter halophytocola KLBMP 5180 isolated from a coastal halophyte

Xiong, You-Wei; Gong, Yuxuan; Li, Xuewei; Chen, Pan; Ju, Xiuyun; Zhang, Chunmei; Yuan, Bo; Z, Lv; Xing, Ke; Qin, Sheng

doi:10.1007/s11104-019-04310-8

Cited by 59 publications

(39 citation statements)

References 65 publications

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“…In agreement with our ndings, other Glutamicibacter strains have also shown PGP traits where a strain G. halophytocola KLMP 1580 have signi cantly promoted the growth of Limonium sinense under high salinity stress [25]. In another study, G. halophytocola KLMP 1580 was also reported to enhance tomato seedlings' growth [26]. Another Glutamicibacter species, G. creatinolyticus was reported as an e cient PGPR with IAA production [27].…”

Section: Physico-chemical Properties Of Night-soil Compost (Nsc) Sampsupporting

confidence: 87%

“…The cold-tolerant LJH19 has shown potential PGP properties physiologically, and genomic evidence has supported the function. Similar genomic insights for saline tolerant strain G. halophytocola KLBMP 5180 has also been reported to carry the genes related to PGP, such as siderophores and spermidine biosynthesis [26]. Like LJH19, KLBMP 5180 also harbored genes such as agmatinase, spermidine synthase, siderophore ABC transport system ATP-binding protein, siderophore ABC transporter substratebinding protein (Supplementary Table S3).…”

Section: Genomic Insights Into Plant Growth-promoting Potential Of Ljmentioning

confidence: 56%

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Comparative Genomics and Physiological Investigation Supported Safety, Cold Adaptation, Efficient Hydrolytic and Plant Growth-promoting Potential of Psychrotrophic Glutamicibacter Arilaitensis LJH19, Isolated from Night-Soil Compost

Borker

Thakur

Kumari

et al. 2020

Preprint

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Background: Night-soil compost (NSC) has traditionally been conserving water and a source of organic manure in northwestern Himalaya. Lately, this traditional method is declining due to modernization, its unhygienic conditions, and social apprehensions. Reduction in the age-old traditional practice has led to excessive chemical fertilizers and water shortage in the eco-sensitive region. In the current study, a bacterium has been analysed for its safety, cold-adaptation, efficient degradation, and plant growth potential attributes for its possible application as a safe bioinoculant in psychrotrophic bacterial consortia for improved night-soil composting.Results: Glutamicibacter arilaitensis LJH19, a psychrotrophic bacterium, was isolated from the night-soil compost of Lahaul valley in northwestern Himalaya. The strain exhibited amylase (186.76 ± 19.28 U/mg), cellulase (21.85 ± 0.7 U/mg) and xylanase (11.31± 0.51 U/mg) activities at 10°C. Possessing efficient hydrolytic activities at low-temperature garners the capability of efficient composting to LJH19. Additionally, the strain possessed multiple plant growth-promoting (PGP) traits such as indole acetic acid production (166.11 ± 5.7 µg/ml), siderophore production (85.72 ±1.06 % psu), and phosphate solubilization (44.76 ± 1.5 µg/ml). Enhanced germination index and germination rate of pea seeds under the LJH19 inoculation further supported the bacterium's PGP potential. Whole-genome sequencing (3,602,821 bps) and genome mining endorsed the cold adaptation, degradation of polysaccharides and, plant growth-promoting traits of LJH19. Biosynthetic gene clusters for type III polyketide synthase (PKS), terpene, and siderophore supplemented the endorsement of LJH19 as a potential PGP bacterium. Comparative genomics within the genus revealed 217 unique genes specific to hydrolytic and PGP activity. Conclusion: The physiological and genomic evidence promotes LJH19 as a potentially safe bio-inoculant to formulate psychrotrophic bacterial consortia for accelerated degradation and improved night-soil compost.

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Section: Physico-chemical Properties Of Night-soil Compost (Nsc) Sampsupporting

confidence: 87%

Section: Genomic Insights Into Plant Growth-promoting Potential Of Ljmentioning

confidence: 56%

Comparative Genomics and Physiological Investigation Supported Safety, Cold Adaptation, Efficient Hydrolytic and Plant Growth-promoting Potential of Psychrotrophic Glutamicibacter Arilaitensis LJH19, Isolated from Night-Soil Compost

Borker

Thakur

Kumari

et al. 2020

Preprint

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“…Proline is an osmolyte stabilizing the cells and a source of nitrogen, carbon, and energy for plant growth. This amino acid provide also tolerance to salt stress by cell turgor maintenance and cells protection against oxidative damages [4,5,[99][100][101][102][103].…”

Section: Discussionmentioning

confidence: 99%

Characterization of Plant Growth-Promoting Traits and Inoculation Effects on Triticum durum of Actinomycetes Isolates under Salt Stress Conditions

et al. 2021

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This study aimed to characterize the halotolerant capability, in vitro, of selected actinomycetes strains and to evaluate their competence in promoting halo stress tolerance in durum wheat in a greenhouse experiment. Fourteen isolates were tested for phosphate solubilization, indole acetic acid, hydrocyanic acid, and ammonia production under different salt concentrations (i.e., 0, 0.25, 0.5, 0.75, 1, 1.25, and 1.5 M NaCl). The presence of 1-aminocyclopropane-1-carboxylate deaminase activity was also investigated. Salinity tolerance was evaluated in durum wheat through plant growth and development parameters: shoot and root length, dry and ash-free dry weight, and the total chlorophyll content, as well as proline accumulation. In vitro assays have shown that the strains can solubilize inorganic phosphate and produce indole acetic acid, hydrocyanic acid, and ammonia under different salt concentrations. Most of the strains (86%) had 1-aminocyclopropane-1-carboxylate deaminase activity, with significant amounts of α-ketobutyric acid. In the greenhouse experiment, inoculation with actinomycetes strains improved the morpho-biochemical parameters of durum wheat plants, which also recorded significantly higher content of chlorophylls and proline than those uninoculated, both under normal and stressed conditions. Our results suggest that inoculation of halotolerant actinomycetes can mitigate the negative effects of salt stress and allow normal growth and development of durum wheat plants.

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“…EPS can reduce ionic toxicity in plants by minimizing Na + influx through an expression of HKT1/K + transporter (Zhang et al, 2008). By influencing key metabolic processes in plants and retaining physicochemical properties of soil, EPS producing bacteria can also contribute to the improvement of crop productivity under saline conditions (Qurashi and Sabri, 2012;Xiong et al, 2019). Apart from these defined roles, bacterial EPS are also linked with cellular sensing and recognition process in the rhizosphere, protection of plant from phytopathogens and to serve as a carbon source during nutrient deficient conditions (Tewari and Arora, 2016;Mishra and Arora, 2018).…”

Section: Exopolysaccharides (Eps)mentioning

confidence: 99%

Secondary Metabolites From Halotolerant Plant Growth Promoting Rhizobacteria for Ameliorating Salinity Stress in Plants

Kumari

Mishra

et al. 2020

Front. Microbiol.

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Soil salinization has emerged as one of the prime environmental constraints endangering soil quality and agricultural productivity. Anthropogenic activities coupled with rapid pace of climate change are the key drivers of soil salinity resulting in degradation of agricultural lands. Increasing levels of salt not only impair structure of soil and its microbial activity but also restrict plant growth by causing harmful imbalance and metabolic disorders. Potential of secondary metabolites synthesized by halotolerant plant growth promoting rhizobacteria (HT-PGPR) in the management of salinity stress in crops is gaining importance. A wide array of secondary metabolites such as osmoprotectants/compatible solutes, exopolysaccharides (EPS) and volatile organic compounds (VOCs) from HT-PGPR have been reported to play crucial roles in ameliorating salinity stress in plants and their symbiotic partners. In addition, HT-PGPR and their metabolites also help in prompt buffering of the salt stress and act as biological engineers enhancing the quality and productivity of saline soils. The review documents prominent secondary metabolites from HT-PGPR and their role in modulating responses of plants to salinity stress. The review also highlights the mechanisms involved in the production of secondary metabolites by HT-PGPR in saline conditions. Utilizing the HT-PGPR and their secondary metabolites for the development of novel bioinoculants for the management of saline agro-ecosystems can be an important strategy in the future.

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Enhancement of growth and salt tolerance of tomato seedlings by a natural halotolerant actinobacterium Glutamicibacter halophytocola KLBMP 5180 isolated from a coastal halophyte

Cited by 59 publications

References 65 publications

Comparative Genomics and Physiological Investigation Supported Safety, Cold Adaptation, Efficient Hydrolytic and Plant Growth-promoting Potential of Psychrotrophic Glutamicibacter Arilaitensis LJH19, Isolated from Night-Soil Compost

Comparative Genomics and Physiological Investigation Supported Safety, Cold Adaptation, Efficient Hydrolytic and Plant Growth-promoting Potential of Psychrotrophic Glutamicibacter Arilaitensis LJH19, Isolated from Night-Soil Compost

Characterization of Plant Growth-Promoting Traits and Inoculation Effects on Triticum durum of Actinomycetes Isolates under Salt Stress Conditions

Secondary Metabolites From Halotolerant Plant Growth Promoting Rhizobacteria for Ameliorating Salinity Stress in Plants

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