Role of lipopolysaccaride extracted from Alcaligenes faecalis as elicitor for the induction of plant defense against fusarium wilt

Patel, Stuti; Thaker, Vrinda S.; Kuvad, Ranjan; Saraf, Meenu

doi:10.1007/s42161-019-00425-0

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…For the first time, A. faecalis isolates revealed the capacity to strongly inhibit Pss in vitro growth. This species has previously displayed ability to inhibit the growth of other phytopathogens under in vitro conditions ( Lahlali et al, 2020 ), as well as capacity to induce plant defenses against fusarium wilt via lipopolysaccharide production ( Patel et al, 2020 ). These features make this species as a potential candidate for OK biocontrol as well.…”

Section: Discussionmentioning

confidence: 99%

Screening the Olive Tree Phyllosphere: Search and Find Potential Antagonists Against Pseudomonas savastanoi pv. savastanoi

et al. 2020

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Olive knot (OK) is a widespread bacterial disease, caused by Pseudomonas savastanoi pv. savastanoi ( Pss ), which currently has not effective control methods. The use of naturally occurring microbial antagonists, such as bacteria, as biocontrol agents could be a strategy to manage this disease. The objective of this work was to select bacteria from olive tree phyllosphere able to antagonize Pss using in vitro and in planta experiments. The elucidation of their modes of action and the potential relationship between antagonism and bacteria origin has been investigated, as well. To this end, 60 bacterial isolates obtained from the surface and inner tissues of different organs (leaves, twigs, and knots), from two olive cultivars of varying susceptibilities to OK, were screened for their in vitro antagonistic effect against Pss . A total of 27 bacterial strains were able to significantly inhibit Pss growth, being this effect linked to bacteria origin. Strains from OK-susceptible cultivar and colonizing the surface of plant tissues showed the strongest antagonistic potential. The antagonistic activity was potentially due to the production of volatile compounds, siderophores and lytic enzymes. Bacillus amyloliquefaciens P41 was the most effective antagonistic strain and their capacity to control OK disease was subsequently assayed using in planta experiments. This strain significantly reduces OK disease severity (43.7%), knots weight (55.4%) and population size of Pss (26.8%), while increasing the shoot dry weight (55.0%) and root water content (39.6%) of Pss -infected olive plantlets. Bacterial isolates characterized in this study, in particular B. amyloliquefaciens P41, may be considered as promising biocontrol candidates for controlling OK disease.

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Section: Discussionmentioning

confidence: 99%

Screening the Olive Tree Phyllosphere: Search and Find Potential Antagonists Against Pseudomonas savastanoi pv. savastanoi

et al. 2020

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“…Photosynthetic bacterium Rhodopseudomonas palustris GJ-22 improved Nicotiana benthamiana growth by producing indole acetic acid and 5-aminolevulinic acid, which also strengthened plant resistance against tobacco mosaic virus by priming pathogenesis-related genes [ 306 ]. Patel et al [ 307 ] indicated that the lipopolysaccharide from Alcaligenes faecalis was a potential biocontrol agent to enhance plant immune response to fusarium wilt.…”

Section: Function Of Soil Microorganisms In Growth Promotion and Qual...mentioning

confidence: 99%

Contributions of Beneficial Microorganisms in Soil Remediation and Quality Improvement of Medicinal Plants

Gang

Ren

Bai

et al. 2022

Plants

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Medicinal plants (MPs) are important resources widely used in the treatment and prevention of diseases and have attracted much attention owing to their significant antiviral, anti-inflammatory, antioxidant and other activities. However, soil degradation, caused by continuous cropping, excessive chemical fertilizers and pesticide residues and heavy metal contamination, seriously restricts the growth and quality formation of MPs. Microorganisms, as the major biota in soil, play a critical role in the restoration of the land ecosystem. Rhizosphere microecology directly or indirectly affects the growth and development, metabolic regulation and active ingredient accumulation of MPs. Microbial resources, with the advantages of economic efficiency, harmless to environment and non-toxic to organisms, have been recommended as a promising alternative to conventional fertilizers and pesticides. The introduction of beneficial microbes promotes the adaptability of MPs to adversity stress by enhancing soil fertility, inhibiting pathogens and inducing systemic resistance. On the other hand, it can improve the medicinal quality by removing soil pollutants, reducing the absorption and accumulation of harmful substances and regulating the synthesis of secondary metabolites. The ecological and economic benefits of the soil microbiome in agricultural practices are increasingly recognized, but the current understanding of the interaction between soil conditions, root exudates and microbial communities and the mechanism of rhizosphere microecology affecting the secondary metabolism of MPs is still quite limited. More research is needed to investigate the effects of the microbiome on the growth and quality of different medicinal species. Therefore, the present review summarizes the main soil issues in medicinal plant cultivation, the functions of microbes in soil remediation and plant growth promotion and the potential mechanism to further guide the use of microbial resources to promote the ecological cultivation and sustainable development of MPs.

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PGPR: Key to Enhancing Crop Productivity and Achieving Sustainable Agriculture

He,

Li,

et al. 2024

Curr Microbiol

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Role of lipopolysaccaride extracted from Alcaligenes faecalis as elicitor for the induction of plant defense against fusarium wilt

Cited by 3 publications

References 16 publications

Screening the Olive Tree Phyllosphere: Search and Find Potential Antagonists Against Pseudomonas savastanoi pv. savastanoi

Screening the Olive Tree Phyllosphere: Search and Find Potential Antagonists Against Pseudomonas savastanoi pv. savastanoi

Contributions of Beneficial Microorganisms in Soil Remediation and Quality Improvement of Medicinal Plants

PGPR: Key to Enhancing Crop Productivity and Achieving Sustainable Agriculture

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