Evaluation of the growth-inducing efficacy of various Bacillus species on the salt-stressed tomato (Lycopersicon esculentum Mill.)

Patani, Anil; Prajapati, Dipak; Ali, Daoud; Kalasariya, Haresh S.; Yadav, Virendra Kumar; Tank, Jigna G.; Bagatharia, S. B.; Joshi, Madhvi; Patel, Ashish

doi:10.3389/fpls.2023.1168155

Cited by 32 publications

(14 citation statements)

References 67 publications

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“…Similar to the findings of Etesami and Beattie [32], our results indicate that the B. paralicheniformis strain LBEndo1 is resistant to high saline concentrations (Figure 1) and has the ability to promote plant growth, as well as alleviate salt stress; in their work, they investigated the growth-promoting effect mediated by bacteria of the Bacillus genus. They discovered that Bacillus strains with salt tolerance demonstrate a greater ability to confer benefits to plants under salt stress conditions [33,34]. The description of bacterial species from the genus Bacillus as plant growth promoters has also been reported by Ibarra-Villarreal [35].…”

Section: Discussionmentioning

confidence: 88%

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Palacio-Rodríguez,

Sáenz-Mata,

Trejo-Calzada

et al. 2023

Agronomy

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Pecan cultivation holds significant global importance. Salinity negatively affects the physiology and metabolism of the plant. However, certain plant growth-promoting rhizobacteria (PGPR) have the ability to reduce salt stress in plants. The objective was to analyze the effects of the rhizobacteria Bacillus paralicheniformis strain LBEndo1 on the development of pecan seedlings under salinity stress conditions. Two factors were analyzed: the presence of saline stress and the bacterial inoculation. The bacterial application was conducted at a concentration of 1 × 108 CFU/mL, and irrigation was administered every third day with 80 mL of water containing 50 mM NaCl. The results show that the rhizobacteria has a maximum tolerance of 15% salinity. Furthermore, the inoculation of PGPR significantly increased the biomass of the seedlings, including the dry weight of leaves, stem, and roots, as well as the stem diameter and height. Furthermore, seedlings that interacted with the rhizobacteria exhibited superior development under saline conditions, with significant increases of 105.5% in chlorophyll concentration and 112% in proline accumulation compared to non-inoculated seedlings. Additionally, a remarkable reduction in leaf damage caused by salt stress was observed. In conclusion, the LBEndo1 rhizobacteria, being a strain resistant to salinity and possessing multiple mechanisms to promote growth while mitigating salt stress, has the potential to be utilized in pecan seedlings to alleviate stress caused by salinity and increases biomass.

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Section: Discussionmentioning

confidence: 88%

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Palacio-Rodríguez,

Sáenz-Mata,

Trejo-Calzada

et al. 2023

Agronomy

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“…SOD acts as the scavenger of O 2 ·− by catalyzing O 2 ·− to H 2 O 2 that can be further metabolized to H 2 O by CAT, POD, and APX ( Choudhury et al., 2017 ). Exogenous regulation of salt tolerance has been associated with the activation of antioxidant enzymes in tomato and lettuce ( Patani et al., 2023 ; El-Salam Shalaby, 2024 ). In the present study, we found that salt stress induced slight increase in the activity of these enzymes.…”

Section: Discussionmentioning

confidence: 99%

“…sugar and starch) to maintain cell turgor under saline conditions ( Wang et al., 2021 ). Proline is another important osmotic regulator ( Patani et al., 2023 ). Proline accumulation plays vital roles in adjusting osmotic potential in plant cells upon salt stress ( Mansour and Ali, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Eugenol improves salt tolerance via enhancing antioxidant capacity and regulating ionic balance in tobacco seedlings

Xu,

Wang,

Sun

et al. 2024

Front. Plant Sci.

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Salt stress inhibits plant growth by disturbing plant intrinsic physiology. The application of exogenous plant growth regulators to improve the plant tolerance against salt stress has become one of the promising approaches to promote plant growth in saline environment. Eugenol (4-allyl-2- methoxyphenol) is the main ingredient in clove oil and it is known for its strong antioxidant and anti-microbial activities. Eugenol also has the ability of inhibiting several plant pathogens, implying the potential use of eugenol as an environmental friendly agrichemical. However, little is known about the possible role of eugenol in the regulation of plant tolerance against abiotic stress. Therefore, here we investigated the effectiveness of phytochemical eugenol in promoting salt tolerance in tobacco seedlings through physiological, histochemical, and biochemical method. The seedling roots were exposed to NaCl solution in the presence or absence of eugenol. Salt stress inhibited seedling growth, but eugenol supplementation effectively attenuated its effects in a dose-dependent manner, with an optimal effect at 20 µM. ROS (reactive oxygen species) accumulation was found in seedlings upon salt stress which was further resulted in the amelioration of lipid peroxidation, loss of membrane integrity, and cell death in salt-treated seedlings. Addition of eugenol highly suppressed ROS accumulation and reduced lipid peroxidation generation. Both enzymatic and non-enzymatic antioxidative systems were activated by eugenol treatment. AsA/DHA and GSH/GSSG were also enhanced upon eugenol treatment, which helped maintain redox homeostasis upon salinity. Eugenol treatment resulted in an increase in the content of osmoprotectants (e.g. proline, soluble sugar and starch) in salt-treated seedlings. Na+ levels decreased significantly in seedlings upon eugenol exposure. This may result from the upregulation of the expression of two ionic transporter genes, SOS1 (salt-hypersensitive 1) and NHX1 (Na+/H+ anti-transporter 1). Hierarchical cluster combined correlation analysis uncovered that eugenol induced salt tolerance was mediated by redox homeostasis and maintaining ionic balance in tobacco seedlings. This work reveals that eugenol plays a crucial role in regulating plant resistant physiology. This may extend its biological function as a novel biostimulant and opens up new possibilities for improving crop productivity in the saline agricultural environment.

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“…A multitude of microorganisms inhabit the rhizosphere and provide beneficial effects to plants by restraining the infiltration of harmful pathogens and aiding in the absorption of nutrients from the soil ( Leach et al, 2017 ; Patani et al, 2023a ). Based on several experiments conducted, it can be asserted that the host plant plays a crucial role in determining the composition of its rhizosphere microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Tomato seed bio-priming with Pseudomonas aeruginosa strain PAR: a study on plant growth parameters under sodium fluoride stress

Singh,

Patani,

Patel

et al. 2024

Front. Microbiol.

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The primary goal of this experiment is to examine the effectiveness of Pseudomonas aeruginosa strain PAR as a rhizobacterium that promotes plant growth in mitigating the negative effects of fluoride-induced stress in tomato (Lycopersicon esculentum Mill.) plants. A total of 16 rhizobacterial strains were tested for plant growth-promoting (PGP) attributes, with isolates S1, S2, and S3 exhibiting different characteristics. Furthermore, growth kinetics studies revealed that these isolates were resilient to fluoride stress (10, 20, 40, and 80 ppm), with isolate S2 exhibiting notable resilience compared to the other two strains. Phylogenetic analysis revealed isolate S2 as P. aeruginosa strain PAR. Physiological analyses demonstrated that P. aeruginosa strain PAR had a beneficial impact on plant properties under fluoride stress, comprising seed germination, root length, shoot height, relative water content, and leaf area, the strain also impacted the buildup of glycine betaine, soluble sugar, and proline, demonstrating its significance in enhancing plant stress tolerance. In P. aeruginosa strain PAR-treated plants, chlorophyll content increased while malondialdehyde (MDA) levels decreased, indicating enhanced photosynthetic efficiency and less oxidative stress. The strain modified antioxidant enzyme action (catalase, ascorbate, glutathione reductase, peroxidase, and superoxide dismutase), which contributed to improved stress resilience. Mineral analysis revealed a decrease in sodium and fluoride concentrations while increasing magnesium, potassium, phosphorus, and iron levels, emphasizing the strain’s significance in nutrient management. Correlation and principal component analysis revealed extensive correlations between physiological and biochemical parameters, underscoring P. aeruginosa strain PAR’s multifaceted impact on plant growth and stress response. This study offers valuable information on effectively utilizing PGPR, particularly P. aeruginosa strain PAR, in fluoride-contaminated soils for sustainable agriculture. It presents a promising biological strategy to enhance crop resilience and productivity.

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Evaluation of the growth-inducing efficacy of various Bacillus species on the salt-stressed tomato (Lycopersicon esculentum Mill.)

Cited by 32 publications

References 67 publications

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Eugenol improves salt tolerance via enhancing antioxidant capacity and regulating ionic balance in tobacco seedlings

Tomato seed bio-priming with Pseudomonas aeruginosa strain PAR: a study on plant growth parameters under sodium fluoride stress

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