Interactions Between Bacteria and<i>Trichoderma hamatum</i>in Suppression of Rhizoctonia Damping-off in Bark Compost Media

Kwok, O. C. H.; Fahy, P. C.; Hoitink, H. A. J.; Kuter, Geoffrey A.

doi:10.1094/phyto-77-1206

Cited by 159 publications

(89 citation statements)

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“…1978;Capper and Campbell 1986;Hadar et al 1983;Schmiedeknecht et al 1998), Cellulomonas (Wadi and Easton 1985), Enterobacter (Hadar et al 1983;Kwok et al 1987;Sneh et al 1984), Erwinia (Sneh et al 1984), Flavobacterium (Chen étal. 1987;Leben étal.…”

Section: Introductionunclassified

“…1987), Hafnia (Sneh 1981), Micromonospora (Filonow and Lockwood 1985), Pasteuria (Brown et al 1985;Stirling 1984), Pseudomonas (Burr et al 1978;Caesar and Burr 1987;Chen and Echandi 1984;Colyer and Mount 1984;Elad and Baker 1985;Ganesan and Gnanamanickman 1987), Rhizobum and Bradyrhizobacterium (Chakraborty and Purkayastha 1984), Serratia (Sneh 1981;Sneh et al 1985), Streptomyces (Doumbou et al 1998;Emmert and Handelsman 1999;Liu étal. 1995;Tahvonen 1982aTahvonen , 1982b and Xanthomonas (Chen et al 1987;Kwok et al 1987). As shown hère, biocontrol agents are not limited to a spé-cifie bacterial group; however, given the microbial diversity of agroecosystems, it is probable that the full spectrum of potentially effective strains has barely been explored.…”

Section: Introductionmentioning

confidence: 99%

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Actinomycetes, promising tools to control plant diseases and to promote plant growth

Doumbou¹,

Salove²,

Crawford³

et al. 2005

phyto

219

130

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Les actinomycètes représentent une grande proportion de la biomasse microbienne du sol et ont la capacité de produire une large variété d’antibiotiques et d’enzymes extracellulaires. Plusieurs souches d’actinomycètes s’avèrent capables de protéger les plantes contre des maladies. Cette revue se penche sur le potentiel des actinomycètes comme (a) source de composés agronomiques, (b) agents stimulant la croissance des plantes et (c) agents de lutte biologique. La revue donne aussi des exemples de lutte biologique contre les agents phytopathogènes bactériens et fongiques par l’utilisation d’espèces d’actinomycetes déjà disponibles sur le marché ou qui le seront probablement au cours des prochaines années.Actinomycetes represent a high proportion of the soil microbial biomass and have the capacity to produce a wide variety of antibiotics and of extracellular enzymes. Several strains of actinomycetes have been found to protect plants against plant diseases. This review focuses on the potential of actinomycetes as (a) source of agroactive compounds, (b) plant growth promoting organisms, and (c) biocontrol tools of plant diseases. This review also addresses examples of biological control of fungal and bacterial plant pathogens by actinomycetes species which have already reached the market or are likely to be exploited commercially within the next few years

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Section: Introductionunclassified

Section: Introductionmentioning

confidence: 99%

Actinomycetes, promising tools to control plant diseases and to promote plant growth

Doumbou¹,

Salove²,

Crawford³

et al. 2005

phyto

219

130

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“…These taxa included a clade of organisms closely related to the genus Telluria, within the family Oxalobacteraceae (Betaproteobacteria) and bacteria from the genus Chryseobacterium (Bacteroidetes) (Green et al, 2006). Both are common to soil environments, and are aerobic, heterotrophic organisms (Kwok et al, 1987;Spiegel et al, 1991;Bowman et al, 1993;Bernardet et al, 2005). However, isolated members of the genus Telluria are flagellated and have chitinolytic, proteolytic and collagenolytic activity (Spiegel et al, 1991;Bowman et al, 1993), while Chryseobacterium are non-motile, heterotrophic organisms, frequently found in composted materials and other organic-rich environments (Kwok et al, 1987;Bernardet et al, 2005;Green et al, 2004Green et al, , 2006.…”

Section: Introductionmentioning

confidence: 99%

“…Both are common to soil environments, and are aerobic, heterotrophic organisms (Kwok et al, 1987;Spiegel et al, 1991;Bowman et al, 1993;Bernardet et al, 2005). However, isolated members of the genus Telluria are flagellated and have chitinolytic, proteolytic and collagenolytic activity (Spiegel et al, 1991;Bowman et al, 1993), while Chryseobacterium are non-motile, heterotrophic organisms, frequently found in composted materials and other organic-rich environments (Kwok et al, 1987;Bernardet et al, 2005;Green et al, 2004Green et al, , 2006. In this study, we investigated these taxa more closely to characterize the interaction of the rhizosphere effect and the influence of compost amendment as it varied between these seed-and root-colonizing microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Contrasting patterns of seed and root colonization by bacteria from the genus Chryseobacterium and from the family Oxalobacteraceae

Green

Michel²,

Hadar

et al. 2007

The ISME Journal

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Microbial colonization of plant seeds and roots is a highly complex process in which soil and plant type can influence the composition of the root-associated and rhizosphere microbial communities. Amendment of compost, a common agricultural technique, introduces exogenous nutrients and microorganisms to the soil-plant environment, and can further influence microbial community composition in the plant environment. Although compost amendments can strongly influence soil and rhizosphere microbial communities, there is evidence that with increasing proximity to the root, plant influences predominate over soil effects. We hypothesized that the 'rhizosphere effect' observed with proximity to plant surfaces does not act equally on all microorganisms. To explore this issue, we examined two bacterial taxa that reproducibly colonized seed and root surfaces in an experiment examining the influence of compost amendment on plant-associated bacterial communities. Population-specific analyses revealed striking differences in the ecology of bacteria from the genus Chryseobacterium and the family Oxalobacteraceae in potting mix and plantassociated environments. Seed-and root-colonizing Oxalobacteraceae populations were highly sensitive to plant effects, and phylogenetic analyses of root-colonizing Oxalobacteraceae revealed the presence of root-associated populations that were highly similar, regardless of treatment, and differed from the potting mix populations detected at the same sampling points. Conversely, Chryseobacterium community composition was found to be essentially invariant within treatments, but was strongly influenced by compost amendment. This persistence and stable nature of the Chryseobacterium community composition demonstrates that rhizosphere selection is not the exclusive factor involved in determining the composition of the cucumber spermosphere and rhizosphere communities.

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“…Besides strain C3, a number of S. maltophilia strains inhibit fungal growth or infection when applied to plants (2,5,6,(10)(11)(12)21), but there is no mechanism of antagonism that is common among these strains. Biological control by these strains has been attributed to induced resistance (6), antibiotics (21), and protease (5).…”

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confidence: 99%

Chitinases from the Plant Disease Biocontrol Agent, Stenotrophomonas maltophilia C3

Zhang¹,

Yuen²,

Sarath³

et al. 2001

Phytopathology®

121

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Stenotrophomonas maltophilia strain C3, a biocontrol agent of Bipolaris sorokiniana in turfgrass, produced chitinases in broth media containing chitin. Chitinases were partially purified from culture fluid by ammonium sulfate precipitation and chitin affinity chromatography. The chromatography fraction with the highest specific chitinase activity was inhibitory to conidial germination and germ-tube elongation of B. sorokiniana, but it was less inhibitory than the protein fraction or the raw culture filtrate. The fraction exhibited strong exochitinase and weak endo-chitinase activity. Optimum temperature and pH for chitinase activity were 45 to 50°C and 4.5 to 5.0, respectively. Chitinase activity was inhibited by Hg2+ and Fe3+, but not by other metal ions or enzyme inhibitors. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of the chromatography fraction revealed the presence of five protein bands of 25, 32, 48, 65, and 75 kDa. Partial amino acid sequences of the 32-, 65-, and 75-kDa proteins indicated that they are homologous to known bacterial chitinases. There was no homology found in the partial amino acid sequences of the 25- and 48-kDa proteins to any known chitinases. Five chitinase-active proteins were detected in the protein and chromatography fractions by activity gels, but when each protein was extracted and re-electrophoresed separately under denaturing conditions, only 32- or 48-kDa proteins were revealed. It was concluded that strain C3 produces at least two chitinases that are antifungal.

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Interactions Between Bacteria andTrichoderma hamatumin Suppression of Rhizoctonia Damping-off in Bark Compost Media

Cited by 159 publications

References 0 publications

Actinomycetes, promising tools to control plant diseases and to promote plant growth

Actinomycetes, promising tools to control plant diseases and to promote plant growth

Contrasting patterns of seed and root colonization by bacteria from the genus Chryseobacterium and from the family Oxalobacteraceae

Chitinases from the Plant Disease Biocontrol Agent, Stenotrophomonas maltophilia C3

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