Enhancement of Biocontrol Efficacy of Serratia plymuthica A21-4 Against Phytophthora Blight of Pepper by Improvement of Inoculation Buffer Solution

Shen, Shun Shan; Park, Sin Hyo; Park, Chang Seuk

doi:10.5423/ppj.2005.21.1.068

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…They are able to increase growth in Zea mays, especially in heavy-metalcontaminated soil [19]. In addition, the isolate Serratia plymuthica A21-4 increases the efficacy of biocontrol against Phytophthora blight of pepper [49]. Although plant growth promotion by Sporosarcina has not yet been reported, it is able to produce glucan by converting Larabinose [64].…”

Section: Biodiversity Of Plant Growth-promoting Rhizobacteria 787mentioning

confidence: 99%

Genetic Diversity of Cultivable Plant Growth-Promoting Rhizobacteria in Korea

Kim

Cho²,

Kim³

et al. 2011

J. Microbiol. Biotechnol.

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To elucidate the biodiversity of plant growth-promoting rhizobacteria (PGPR) in Korea, 7,638 bacteria isolated from the rhizosphere of plant species growing in many different regions were screened. A large number of PGPR were identified by testing the ability of each isolate to promote the growth of cucumber seedlings. After redundant rhizobacteria were removed via amplified rDNA restriction analysis, 90 strains were finally selected as PGPR. On the basis of 16S ribosomal RNA sequences, 68 Gram-positive (76%) and 22 Gram-negative (24%) isolates were assigned to 21 genera and 47 species. Of these genera, Bacillus (32 species) made up the largest complement, followed by Paenibacillus (19) and Pseudomonas (11). Phylogenetic analysis showed that most of the Grampositive PGPR fell into two categories: low-and high-G+C (Actinobacteria) strains. The Gram-negative PGPR were distributed in three categories: α-proteobacteria, βproteobacteria, and γ-proteobacteria. To our knowledge, this is the largest screening study designed to isolate diverse PGPR. The enlarged understanding of PGPR genetic diversity provided herein will expand the knowledge base regarding beneficial plant-microbe interactions. The outcome of this research may have a practical effect on crop production methodologies.

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Section: Biodiversity Of Plant Growth-promoting Rhizobacteria 787mentioning

confidence: 99%

Genetic Diversity of Cultivable Plant Growth-Promoting Rhizobacteria in Korea

Kim

Cho²,

Kim³

et al. 2011

J. Microbiol. Biotechnol.

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“…1A-C). This result offers new evidence for the growth-promoting effect of A21-4 on tomato.Furthermore,our previous studies showed that the strain A21-4 readily colonized on roots of barley,rice,Chinese cabbage, cucumber, watermelon, tomato, and pepper when inoculated on root and seed.Pepper plants with strain A21-4 inoculation had higher seed germination rate, the better growth and greater fruits yield compared with control (Shen et al, 2005).Furthermore,A21-4 also controlled successfully the P. capsici induced-Phytophthora blight of pepper (Shen et al, 2007).Therefore,A21-4 has the potential to be developed as a new and important biocontrol agent to promote crop growth and control plant disease.…”

Section: Discussionmentioning

confidence: 98%

“…Serratia plymuthica A21-4, as a promising biocontrol agent,was isolated from the root of onion (Allium cepa L.) (Shen et al, 2002)and the strain showed high efficacy on growth promoting activity (Shen et al, 2005)and the control of Phytophthora blight of pepper (Shen et al, was not certified by peer review) is the author/funder. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

High red/far-red ratio promotes root colonization ofSerratia plymuthicaA21-4 in tomato by root exudates-stimulated chemotaxis and biofilm formation

Guo

Qin

et al. 2023

Preprint

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Effective colonization on plant roots is a prerequisite for plant growth promoting rhizobacterias (PGPR) to exert beneficial activities. However, how light modulates root colonization of PGPR remains unclear. Here, we found that high red/far red(R/FR) light promoted and low R/FR light inhibited the colonization of Serratia plymuthica A21-4 on tomato. Non-targeted metabolomic analysis of root exudates collected from different R/FR ratio treated tomato seedlings with A21-4 inoculation showed that 64 primary metabolites in high R/FR light-grown plants significantly increased compared with those determined for low R/FR light-grown plants. Among them, 7 amino acids, 1 organic acid and 1 sugar obviously induced the chemotaxis and biofilm formation of A21-4 compared to the control. Furthermore, exogenous addition of five artificial root exudate compontents (leucine, methionine, glutamine, 6-aminocaproic acid and melezitose) regained and further increased the colonization ability of A21-4 in tomato under low R/FR light and high R/FR light, respectively, indicating their involvement in high R/FR light-regulated the interaction of tomato root and A21-4. Taken together, our results, for the first time, clearly demonstrate that high R/FR light-induced root exudates play a key role in chemotaxis, biofilm formation and root colonization of A21-4, which can help promote the combined application of light supplementation and PGPR to facilitate crop growth and health in agricultural production.

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Development of Formulations and Commercialization of Biological Products

Narayanasamy¹

2013

Biological Management of Diseases of Crops

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Enhancement of Biocontrol Efficacy of Serratia plymuthica A21-4 Against Phytophthora Blight of Pepper by Improvement of Inoculation Buffer Solution

Cited by 5 publications

References 3 publications

Genetic Diversity of Cultivable Plant Growth-Promoting Rhizobacteria in Korea

Genetic Diversity of Cultivable Plant Growth-Promoting Rhizobacteria in Korea

High red/far-red ratio promotes root colonization ofSerratia plymuthicaA21-4 in tomato by root exudates-stimulated chemotaxis and biofilm formation

Development of Formulations and Commercialization of Biological Products

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