Progress towards integrated control of damping-off disease

Harris, A.R.; Nelson, Scott

doi:10.1016/s0944-5013(99)80004-4

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…Among the isolates, one strain named S150 showed specific antagonistic ability against plant pathogenic fungi (Phytophthora nicotianae and Rhizoctonia solani) rather than against phytobacteria (Ralstonia solanacearum and Xanthomonas oryzae) ( Figure 1). P. nicotianae and R. solani are two of the most devastating plant fungal pathogens that cause root rot diseases in various crops (Harris & Nelson, 1999). It shows the potential to exploit biocontrol agents for the control of soil-borne fungal diseases specifically.…”

Section: In Vitro Antimicrobial Activitymentioning

confidence: 99%

Genomic insights into a plant growth‐promoting Pseudomonas koreensis strain with cyclic lipopeptide‐mediated antifungal activity

Wang

et al. 2020

MicrobiologyOpen

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Strain S150 was isolated from the tobacco rhizosphere as a plant growth‐promoting rhizobacterium. It increased plant fresh weight significantly and lateral root development, and it antagonized plant pathogenic fungi but not phytobacteria. Further tests showed that strain S150 solubilized organic phosphate and produced ammonia, siderophore, protease, amylase, and cellulase, but it did not produce indole‐3‐acetic acid. Using morphology, physiological characteristics, and multi‐locus sequence analysis, strain S150 was identified as Pseudomonas koreensis. The complete genome of strain S150 was sequenced, and it showed a single circular chromosome of 6,304,843 bp with a 61.09% G + C content. The bacterial genome contained 5,454 predicted genes that occupied 87.7% of the genome. Venn diagrams of the identified orthologous clusters of P. koreensis S150 with the other three sequenced P. koreensis strains revealed up to 4,167 homologous gene clusters that were shared among them, and 21 orthologous clusters were only present in the genome of strain S150. Genome mining of the bacterium P. koreensis S150 showed that the strain possessed 10 biosynthetic gene clusters for secondary metabolites, which included four clusters of non‐ribosomal peptide synthetases (NRPSs) involved in the biosynthesis of cyclic lipopeptides (CLPs). One of the NRPSs possibly encoded lokisin, a cyclic lipopeptide produced by fluorescent Pseudomonas. Genomic mutation of the lokA gene, which is one of the three structural NRPS genes for lokisin in strain S150, led to a deficiency in fungal antagonism that could be restored fully by gene complementation. The results suggested that P. koreensis S150 is a novel plant growth‐promoting agent with specific cyclic lipopeptides and contains a lokisin‐encoding gene cluster that is dominant against plant fungal pathogens.

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Section: In Vitro Antimicrobial Activitymentioning

confidence: 99%

Genomic insights into a plant growth‐promoting Pseudomonas koreensis strain with cyclic lipopeptide‐mediated antifungal activity

Wang

et al. 2020

MicrobiologyOpen

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“…Current control of Rhizoctonia diseases includes fumigation, fungicide treatments and stringent hygiene (Harris & Nelson 1999). However, due to the well-known detrimental effects of chemicals, their possible ineffectiveness and the development of pathogen resistance, the use of antagonistic microorganisms able to control pathogen growth and damage to plants is becoming a promising option (Lewis & Lumsden 2001).…”

Section: Introductionmentioning

confidence: 99%

Interactions between a fluorescent pseudomonad, an arbuscular mycorrhizal fungus and a hypovirulent isolate ofRhizoctonia solaniaffect plant growth and root architecture of tomato plants

Gamalero

Pivato

Bona

et al. 2010

Plant Biosystems - An International Journal Dealing with all As

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Although Rhizoctonia solani is a cosmopolitan soilborne pathogen, the genus includes isolates with different pathogenicity ranging from high virulence to avirulence. The biocontrol strain Pseudomonas fluorescens P190r and the arbuscular mycorrhizal (AM) fungus Glomus mosseae BEG12 were inoculated alone or in combination in tomato plants infested by the mildly virulent pathogen R. solani #235. Plant growth as well as root morphometric and topological parameters were evaluated. The infection of R. solani was significantly reduced by all the combinations of the beneficial microorganisms. Root systems of R. solaniinfected plants were weakly developed but highly branched with a herring-bone pattern, while those inoculated with the AM fungus, alone or in combination with the bacterial strain, were longer and more developed, and displayed a dichotomous pattern. The interactions among these three microorganisms affected plant growth and root architecture of tomato plants.

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Solid formulations of binucleate Rhizoctonia isolates suppress Rhizoctonia solani and Pythium ultimum in potting medium

Harris

2000

Microbiological Research

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Progress towards integrated control of damping-off disease

Cited by 6 publications

References 19 publications

Genomic insights into a plant growth‐promoting Pseudomonas koreensis strain with cyclic lipopeptide‐mediated antifungal activity

Genomic insights into a plant growth‐promoting Pseudomonas koreensis strain with cyclic lipopeptide‐mediated antifungal activity

Interactions between a fluorescent pseudomonad, an arbuscular mycorrhizal fungus and a hypovirulent isolate ofRhizoctonia solaniaffect plant growth and root architecture of tomato plants

Solid formulations of binucleate Rhizoctonia isolates suppress Rhizoctonia solani and Pythium ultimum in potting medium

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