Extremophilic bacterial strains as plant growth promoters and biocontrol agents against Pythium ultimum and Rhizocotnia solani

Abdelaziz, Sayed; Belal, Eman E.; Al-Quwaie, Diana A.; Ashkan, Mada F.; Alqahtani, Fatimah S.; El‐Tarabily, Khaled A.; El–Mageed, Taia A. Abd; Shami, Ashwag; Nader, Maha M.; Hemeda, Nada F.

doi:10.1007/s42161-023-01460-8

Cited by 3 publications

(2 citation statements)

References 139 publications

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“…Due to their various antagonistic properties against phytopathogens, fluorescent Pseudomonas and Bacillus are the most studied bacteria regarding their usefulness as biocontrol agents of phytopathogens (Lemanceau et al, 2007;Bouizgarne, 2013;Bouizgarne and Ouhdouch, 2017). Another indirect mechanism is known as induced systemic resistance (ISR) which allows plants to protect themselves against fungal and bacterial disease agents (Chen et al, 2020;Yahya et al, 2021;Abdelaziz et al, 2023;Bellotti et al, 2023). Bacteria belonging to Pseudomonas and Bacillus strains were described as resistance inducers in tomato phytopathogens (Gautam et al, 2019;Bellotti et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

Phosphate solubilizing Pseudomonas and Bacillus combined with rock phosphates promoting tomato growth and reducing bacterial canker disease

Bakki,

Banane,

Marhane

et al. 2024

Front. Microbiol.

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Nowadays, sustainable agriculture approaches are based on the use of biofertilizers and biopesticides. Tomato (Solanum lycopersicum L.) rhizosphere could provide rhizobacteria with biofertilizing and biopesticide properties. In this study, bacteria from the rhizosphere of tomato were evaluated in vitro for plant growth promotion (PGP) properties. Five Pseudomonas isolates (PsT-04c, PsT-94s, PsT-116, PsT-124, and PsT-130) and one Bacillus isolate (BaT-68s), with the highest ability to solubilize tricalcium phosphate (TCP) were selected for further molecular identification and characterization. Isolates showed phosphate solubilization up to 195.42 μg mL−1. All isolates showed phosphate solubilization by organic acid production. The six isolates improved seed germination and showed effective root colonization when tomato seeds were coated with isolates at 106 cfu g−1 in axenic soil conditions. Furthermore, the selected isolates were tested for beneficial effects on tomato growth and nutrient status in greenhouse experiments with natural rock phosphate (RP). The results showed that inoculated tomato plants in the presence of RP have a higher shoot and root lengths and weights compared with the control. After 60 days, significant increases in plant Ca, Na, P, protein, and sugar contents were also observed in inoculated seedlings. In addition, inoculated tomato seedlings showed an increase in foliar chlorophyll a and b and total chlorophyll, while no significant changes were observed in chlorophyll fluorescence. In greenhouse, two Pseudomonas isolates, PsT-04c and PsT-130, showed ability to trigger induced systemic resistance in inoculated tomato seedlings when subsequently challenged by Clavibacter michiganensis subsp. michiganensis, the causal agent of tomato bacterial canker. High protection rate (75%) was concomitant to an increase in the resistance indicators: total soluble phenolic compounds, phenylalanine-ammonia lyase, and H2O2. The results strongly demonstrated the effectiveness of phosphate-solubilizing bacteria adapted to rhizosphere as biofertilizers for tomato crops and biopesticides by inducing systemic resistance to the causal agent of tomato bacterial canker disease.

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Section: Discussionmentioning

confidence: 99%

Phosphate solubilizing Pseudomonas and Bacillus combined with rock phosphates promoting tomato growth and reducing bacterial canker disease

Bakki,

Banane,

Marhane

et al. 2024

Front. Microbiol.

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“…According to a research by S. Abdelaziz et al, the extremophiles Bacillus halotolerans, Massilia alkalitolerans, and Bacillus aryabhattai produced lytic enzymes and siderophores. Furthermore, the strains displayed hidh antagonistic activity against plant fhytopatogens as Pythium ultimum and Rhizocotnia solani [10]. Extremophilic microorganisms have been reported to express plant defense mechanisms through the synthesis of xylanase and cellulase enzymes [11].…”

Section: Introductionmentioning

confidence: 99%

The biopotential of extremophilic microorganisms isolated from Kuzbass for protection and growth stimulation of oat (Avena sativa L.)

Serazetdinova,

Borodina,

Kolpakova

et al. 2024

BIO Web Conf.

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Biological plant protection products are extensively utilized in agriculture owing to their safety, efficacy, and environmental friendliness. The utilization of these funds in locales with challenging weather patterns is constrained. In order to ensure the successful use of biological plant protection products, it is rational to search for microorganisms adapted to the specific soil and climatic conditions of the territory. The objective of the investigation is to evaluate the antagonistic and growth-stimulating properties of the consortium of extremophilic microorganisms of Kuzbass, and to conduct laboratory testing on oats (Avena sativa L.). The work used microorganisms isolated at the initial stages of the research, such as Leclercia sp., Sphingomonas paucimobilis, and Lactobacillus plantarum. The findings revealed that these microorganisms are capable of producing gibberellic acid, dissolving phosphates, and retaining atmospheric nitrogen. Furthermore, the co-cultivation of microorganisms facilitates the enhancement of these indicators. The negative impact of phytopathogens (Alternaria alternata (F-525), Fusarium graminearum (F-877) PH-1, Fusarium graminearum (F-892) and Fusarium sporotrichioides (F-902)) on oats in laboratory conditions was reduced by a consortium based on these microorganisms. Therefore, the consortium has the potential to develop commercial drugs. Field experiments are planned in the future.

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Drought-tolerant plant growth-promoting rhizobacteria alleviate drought stress and enhance soil health for sustainable agriculture: A comprehensive review

El-Saadony,

Saad,

Mohammed

et al. 2024

Plant Stress

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Extremophilic bacterial strains as plant growth promoters and biocontrol agents against Pythium ultimum and Rhizocotnia solani

Cited by 3 publications

References 139 publications

Phosphate solubilizing Pseudomonas and Bacillus combined with rock phosphates promoting tomato growth and reducing bacterial canker disease

Phosphate solubilizing Pseudomonas and Bacillus combined with rock phosphates promoting tomato growth and reducing bacterial canker disease

The biopotential of extremophilic microorganisms isolated from Kuzbass for protection and growth stimulation of oat (Avena sativa L.)

Drought-tolerant plant growth-promoting rhizobacteria alleviate drought stress and enhance soil health for sustainable agriculture: A comprehensive review

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