Halophilic rhizobacteria promote growth, physiology and salinity tolerance in Sesamum indicum L. grown under salt stress

Frontiers in Microbiology, Год журнала: 2025, Номер 16

Опубликована: Май 14, 2025

Introduction Salt stress is a major global issue that negatively affects plant growth and physiological processes. Plant growth-promoting rhizobacteria (PGPR) are known to alleviate salt promote growth. This study aimed isolate characterize salt-tolerant PGPR from salinity-affected soils in Tamil Nadu, India, assess their potential enhance tolerance sesame ( Sesamum indicum L.). Methods Salt-tolerant were isolated screened for traits. One isolate, designated PAS1, demonstrated significant capabilities, including the production of indole-3-acetic acid (IAA; 48.56 μg ml −1 ), siderophore (89.20 ± 0.65%), phosphate solubilization (7.8 mm zone clearance), ammonia, hydrogen cyanide (HCN) production. PAS1 was identified as Bacillus flexus . Sesame plants inoculated with B. grown under different concentrations (0, 100, 200 mM NaCl) 45 days. Results Inoculation significantly improved biochemical parameters stress, increased chlorophyll content (4.4 mg g proline (0.0017 soluble sugars (61.34 amino acids (1.10 proteins (3.31 ). Additionally, antioxidant enzyme activities enhanced, indicated by DPPH scavenging activity (60.25%), superoxide dismutase (231.29 U protein), peroxidase (6.21 catalase (3.38 reduction malondialdehyde (23.32 μmol Discussion The demonstrates inoculation can effectively improve stress. These findings suggest halo-tolerant strains like could serve promising biofertilizers crop productivity salt-affected agricultural soils.

Язык: Английский

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Salt stress mitigation and improvement in fruit nutritional characteristics of tomato plants: New opportunities from the exploitation of a halotorelant Agrobacterium strain

Plant Stress, Год журнала: 2024, Номер 13, С. 100558 - 100558

Опубликована: Авг. 8, 2024

Soil salinity is considered one of the most limiting factors in large agricultural areas, and tomato (Solanum lycopersicum L.) highly sensitive to this abiotic stress, which exacerbates under drought. The use halotolerant PGPR a promising strategy enhance tolerance productivity saline soils. present study tested capability recently discovered bacterial strain PVr_9 increase plants vitro, greenhouse open field conditions. When inoculated with PVr_9, vitro seedlings showed significant primary root length, number secondary roots fresh weight both absence stress when exposed 150 mM NaCl. In salt treatment, upregulated genes SOS1 NHX1, enzyme prolyl aminopeptidase involved proline metabolism. Proteins associated resistance against pathogens were also by stress. greenhouse, PVr_9-inoculated treated for 1-week NaCl shoot biomass, chlorophyll, content, APX activity. Tomato fruits from plants, during flowering stage, higher levels carotenoids, lycopene, l-ascorbic acid, as well an increased antioxidant capacity compared uninoculated plants. These results indicate potential biostimulant better tackling soil salinization context climate change expansion coastal salinity, while there scope improvement nutritional characteristics fruits.

Язык: Английский

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Integrative physiology and transcriptome sequencing reveal differences between G. hirsutum and G. barbadense in response to salt stress and the identification of key salt tolerance genes

BMC Plant Biology, Год журнала: 2024, Номер 24(1)

Опубликована: Авг. 21, 2024

Soil salinity is one of the major abiotic stresses that threatens crop growth. Cotton has some degree salt tolerance, known as "pioneer crop" saline-alkali land. Cultivation cotton great significance to utilization land and development industry. Gossypium hirsutum G. barbadense, two species, are widely cultivated worldwide. However, until recently, regulatory mechanisms specific differences their responses stress have rarely been reported.

Язык: Английский

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Coastal Almond-Leaved Pear (Pyrus spinosa) Seedlings’ Responses to Saline Stress Alleviated by Formulated L-Methionine and Bacterial Exogenous Soil Application

Horticulturae, Год журнала: 2024, Номер 10(8), С. 849 - 849

Опубликована: Авг. 10, 2024

Coastal Pyrus spinosa seedlings were tested for their developmental, chlorophyll content and antioxidant performance under soil saline conditions where bacterial l-methionine exogenous treatments applied as potential alleviation stress schemes. Scaling up stress, the number of formed lateral shoots was reduced in all treatments. Medium salt (75 mM NaCl) demonstrated a rather unified decline shoot fresh weight values, which became toxic at 100 NaCl, with to 89.1% losses, comparison unchallenged status. Both applications increased root/shoot ratio, providing developmental boost root growth. Total values (May–July) did not differ among non-stressed plantlets independently treatment. All experimental plantlet lines activity on scaled NaCl enrichment. Νo differences orientation angle frequencies observed while exposure took place. In brief, spring–summer P. can be manageable, achieving higher ratio upregulating leaf optimizing growth upon supplementation. However, many examined parameters found extensively different between exogenously treated non-supplemented ones, suggesting role intergenerational transgenerational memory.

Язык: Английский

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Screening of saline-alkali tolerant microorganisms and their promoting effects on rice growth under saline-alkali stress

Journal of Cleaner Production, Год журнала: 2024, Номер 481, С. 144176 - 144176

Опубликована: Ноя. 1, 2024

Язык: Английский

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Integrative physiology and transcriptome reveal differences between G. hirsutum and G. barbadense in response to salt stress and the identification of key salt tolerance genes

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Июнь 12, 2024

Background Soil salinity is one of the major abiotic stresses that threatens crop growth and environment. G. hirsutum barbadense, as two cultivated cotton species, are widely worldwide. Also, they preferred crops for saline cultivation due to their high salt tolerance. However, until recently, differences regulatory mechanisms responses stress have rarely been reported. Results In this study, we comprehensively compared effects on TM-1 barbadense H7124. The results showed severely inhibited both with H7124 exhibiting a better phenotype, especially leaves. Further measurements found leaves maintained greater cellular homeostasis photosynthetic capacity under stress. Physiologically, observed exhibited superior osmotic regulation antioxidant capability TM-1, while displayed K⁺ absorption than Transcriptome analysis revealed significant molecular between species in response key pathways induced by mainly related growth, development regulation, such porphyrin metabolism, DNA replication, ribosome photosynthesis. Conversely, were plant defense, hormone signal transduction, MAPK signaling pathway-plant, phenylpropanoid biosynthesis. These underscore varied strategies adopted navigate through stress, may exhibit stronger Furthermore, identified 217 potential tolerance DEGs based gene function, 167 which overlapped confidence intervals SNPs previous GWASs, indicating reliability these genes. Finally, selected genes involved different monitored expression levels at time points, revealing time-specific Conclusions findings provide new insights into candidate breeding cotton.

Язык: Английский

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Physiological and Transcriptomic Analyses Demonstrate the Ca2+-Mediated Alleviation of Salt Stress in Magnolia wufengensis

Plants, Год журнала: 2024, Номер 13(17), С. 2418 - 2418

Опубликована: Авг. 29, 2024

, a newly discovered ornamental species in the Magnoliaceae family, is susceptible to salinity. Moreover, Ca

Язык: Английский

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Molecular regulations of ethylene signaling in plant salt stress responses

Plant Stress, Год журнала: 2024, Номер 14, С. 100583 - 100583

Опубликована: Сен. 3, 2024

Ethylene serves a pivotal function in plant growth, development, and stress responses. Initially received by receptors, ethylene signals the journey to nuclear transcription factors via downstream elements, prompting expression of relevant genes engaging diverse physiological biochemical processes. Over preceding decades, bulk research efforts concentrated on unraveling components signaling deciphering their molecular regulations. Remarkably less attention, however, was devoted scrutinizing role fostering salt tolerance plants. Crucial questions, such as whether positively or negatively impacts tolerance, remain insufficiently explored. Similarly, precise orchestrating SOS pathway for is not comprehensively understood. Hence, this article seeks narrow knowledge gap exploring latest breakthroughs comprehending how contributes plants' responses when encountering stress. It will explore synthesis's role, functions components, intricate interplay between other pathways during These studies only deepen our comprehension ethylene's involvement but also offer valuable insights leveraging develop new varieties resilient

Язык: Английский

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Rhizobacterial diversity, community composition, and the influence of keystone taxa on O’Neal blueberry (Vaccinium corymbosum)

Frontiers in Microbiology, Год журнала: 2024, Номер 15

Опубликована: Сен. 13, 2024

Rhizosphere microbiotas play vital roles in resisting environmental stress, transforming soil nutrients, and promoting plant health, growth, productivity. The effects of rhizosphere microbial community shaping the characteristics functions keystone taxa on blueberries were comprehensively studied by examining rhizobacteria healthy old trees (O), young seedlings (OG), poorly growing (OB) O'Neal blueberries. Our results showed that rhizobacterial diversity followed order OB > OG O, was similar to while distinctly different. predominant identified included

Язык: Английский

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Paenibacillus polymyxa J2‐4 induces cucumber to enrich rhizospheric Pseudomonas and contributes to Meloidogyne incognita management under field conditions

Pest Management Science, Год журнала: 2024, Номер unknown

Опубликована: Сен. 25, 2024

Abstract BACKGROUND Root knot nematodes (RKNs) pose a great threat to agricultural production worldwide. The bacterial nematocides have received increasing attention due their safe and efficient control against RKNs. Here, we investigated the biocontrol efficacy of Paenibacillus polymyxa J2‐4 Meloidogyne incognita in field analyzed rhizosphere microbiome cucumber under nematode infection after application strain. Furthermore, biomarker strain Pseudomonas spp. was isolated from J2‐4‐inoculated soil, its nematocidal activity growth‐promoting effect on host plants were determined. In addition, chemotaxis assay P. fluroescens ZJ5 toward root exudates carried out. RESULTS experiment demonstrated that could effectively suppressed gall formation plants, with galling index reduced by 67.63% 2022 65.50% 2023, respectively, compared controls. Meanwhile, plant height yield significantly increased treated Metagenomic analysis indicated altered microbial communities. relative abundance notably enhanced group, which consistent Linear discriminant Effect Size results determined as one biomarkers group. strain, strains, soil identified fluorescens. fluorescens exhibited high nematicidal vitro vivo , 99.20% mortality rate M. at 24 h 69.75% reduction. efficiency synthetic community plus superior any other single bacteria . Additionally, ability inoculated J2‐4. CONCLUSION has good potential biological conditions. Enrichment beneficial contributes management. © 2024 Society Chemical Industry.

Язык: Английский

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