The role of Bacillus species in the management of plant-parasitic nematodes

Frontiers in Microbiology, Год журнала: 2025, Номер 15

Опубликована: Янв. 17, 2025

Plant-parasitic nematodes (PPNs), including root-knot (Meloidogyne spp.), cyst (Heterodera and Globodera other economically significant nematode species, pose severe threats to global agriculture. These employ diverse survival strategies, such as dormancy in cysts or robust infective juvenile stages. Consequently, their management is challenging. Traditional control methods, the use of chemical nematicides, are increasingly scrutinized because environmental health concerns. This review focuses on specific mechanisms employed by Bacillus spp., nematicidal compound production, systemic resistance induction, cuticle degradation, target nematodes. offer sustainable solutions for managing promoting soil enhancing microbial diversity nutrient cycling. An integrated approach leveraging Bacillus-based biocontrol proposed maximize efficacy agricultural sustainability.

Язык: Английский

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Ameliorative effect of rhizobacteria Bradyrhizobium japonicum on antioxidant enzymes, cell viability and biochemistry in tomato plant under nematode stress

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Март 7, 2025

Root Knot Nematode (Meloidogyne incognita) is a major agricultural pest that significantly reduces crop yield. This study investigates the nematicidal potential of Bradyrhizobium japonicum strain 11477 against M. incognita to regulate its pathogenicity in Solanum lycopersicum. Tomato seeds were treated with bacterial cells and supernatant, grown under controlled conditions later infested nematode juveniles (5J2/seedling). After 10 days, infestation led reduced seedling growth, lower root shoot biomass decreased photosynthetic pigments. It also triggered oxidative stress, as indicated by elevated stress markers. Enzymatic non-enzymatic antioxidants along phenolic compounds showed increased activity response nematode-induced stress. However, B. treatment gall formation, improved plant growth enhanced biochemical histochemical attributes. Rhizobacteria alleviated indices, strengthened antioxidant defenses metabolite production. Confocal microscopy revealed hydrogen peroxide localization, glutathione content nuclear membrane damage apices, correlating defense responses. highlights potent biocontrol agent enhances resilience incognita. Notably, this first report on impact leguminous rhizobacterium non-leguminous tomato plant, providing new insights into for sustainable management.

Язык: Английский

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Deciphering the Biocontrol Potential of Trichoderma asperellum (Tv1) Against Fusarium‐Nematode Wilt Complex in Tomato

Journal of Basic Microbiology, Год журнала: 2024, Номер unknown

Опубликована: Окт. 29, 2024

ABSTRACT The study assessed Trichoderma spp. as a biocontrol agent for managing wilt‐nematode complex in tomato crops, aiming to mitigate yield losses. Fusarium sp. and Meloidogyne were isolated from infected plant samples confirmed molecularly morphologically oxysporum f.sp. lycopersici incognita . Four procured the Department of Plant Pathology, Tamil Nadu Agricultural University, India identified asperellum (Tv1), asperelloides (Tasd1), harzianum (Th1), koningiopsis (Tk1) utilizing ITS TEF1 primer pairs. Among them, Tv1 effectively inhibited mycelial growth pathogen isolates. Furthermore, crude metabolite exhibited similar effects. mortality rate M. J2s ranged 90.48% 100% after 24–72 h incubation inhibition percentage egg hatching reached 90.20%. shoot length, root fresh weight, dry weight plants treated with conidia increased. In pot experiment, treatment reduced disease incidence by 64.57%, comparable carbendazim (82.32%). Tv1‐treated had fewer galls, masses, per 100 g roots than inoculated‐untreated control plants. root‐knot index (RKI) was significantly lower carbafuran (1.98 ± 0.047) (3.06 0.086) (4.47 0.109). bio‐control efficiency against 21.04%, nematodes' reproductive factor (RF) declined 0.53 group. Based on findings above, it established that controlled nematode populations wilt when applied soil.

Язык: Английский

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Biocontrol Potential of Bacteria Isolated from Vermicompost against Meloidogyne incognita on Tomato and Cucumber Crops

Horticulturae, Год журнала: 2024, Номер 10(4), С. 407 - 407

Опубликована: Апрель 17, 2024

Root-knot nematodes are the major diseases in protected cultivation around world. Bio-organic fertilizer has become a research hotspot, with variety of microorganisms that control various vegetable soil-borne diseases. This study screened nematocidal from fresh vermicompost, explored inhibitory substances produced by biocontrol agents, and evaluated their potential ability pot field under greenhouse conditions. The highly effective antagonistic microbes Meloidogyne incognita (M. incognita) were screened. Strains YL1 YL31 identified as Peribacillus frigoritolerans, strain YL6 was Lysinibacillus fusiformis. three strains all chitinase protease, which prevented normal development eggs second-stage juveniles (J2) destroying appearance. improved potassium-dissolving ability, also enhanced phosphorus-dissolving ability. Pot experiments showed tomato root knots reduced, plant growth improved. Field tests root-knot index nematode population reduced significantly, cucumber yield enhanced. Strain had best effect 70.6%, increased 14.9% compared control. Overall, this bacteria YL1, YL6, to nematodes, these could be developed agents for sustainable agriculture.

Язык: Английский

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Genomic characterization and computational phenotyping of agriculturally important microbes

Elsevier eBooks, Год журнала: 2025, Номер unknown, С. 301 - 314

Опубликована: Янв. 1, 2025

Язык: Английский

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SlRGLG2-SlBEL2 module regulates drought tolerance in tomato

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

BEL1-LIKE HOMEODOMAIN (BLH/BELL) family transcription factors play important roles in the response of plants to environmental stress. In this study, we found that BLH/BELL factor SlBEL2 affects drought tolerance tomato plants, as SlBEL2-knockout (KO-SlBEL2) showed enhanced tolerance, whereas SlBEL2-overexpression (OE-SlBEL2) displayed impaired tolerance. Further research demonstrated negatively regulates by suppressing expression a number genes respond drought. addition, RING E3 ligase, SlRGLG2, interacts with and promotes ubiquitination degradation SlBEL2, thus affecting stability protein, which turn positively plants. summary, SlRGLG2-SlBEL2 module aforementioned findings offer novel viewpoint on plant's regulatory network.

Язык: Английский

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SlRGLG2-SlBEL2 module regulates drought tolerance in tomato

Plant Molecular Biology, Год журнала: 2025, Номер 115(3)

Опубликована: Май 30, 2025

Язык: Английский

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Chitinase Gene FoChi20 in Fusarium oxysporum Reduces Its Pathogenicity and Improves Disease Resistance in Cotton

International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(15), С. 8517 - 8517

Опубликована: Авг. 4, 2024

Chitinase genes, as a class of cell wall hydrolases, are essential for the development and pathogenesis

Язык: Английский

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Comparative performance of biological formulations for the management of Meloidogyne enterolobii in chickpea (Cicer arietinum).

Crop Protection, Год журнала: 2024, Номер unknown, С. 107082 - 107082

Опубликована: Дек. 1, 2024

Язык: Английский

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