Role of antibiosis in antagonism of Streptomyces hygroscopicus var. geldanus to Rhizoctonia solani in soil

Rothrock, C. S.; Gottlieb, David

doi:10.1139/m84-230

Cited by 157 publications

(81 citation statements)

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“…geldanus, a bacterium that produces the ansamycin antibiotic geldanamycin is able to protect a pea plant (Pisum sativum L.) from fungal attack by Rhizoctonia solani. 171) A symbiotic association between a bacterium and mosses or higher plants raises the question as to the identity of such a microorganism and invokes a possible microorganism/plant coevolution.…”

Section: Evolutionary and Ecologicalmentioning

confidence: 99%

Recent Developments in the Maytansinoid Antitumor Agents

et al. 2004

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Section: Evolutionary and Ecologicalmentioning

confidence: 99%

Recent Developments in the Maytansinoid Antitumor Agents

et al. 2004

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“…This indicates that antibiotics do indeed act in antagonistic capacities in nature. Rothrock and Gottlieb (1984) presented évidence that the antibiotic geldanamycin is produced in soil by Streptomyces hygroscopicusvar. geldanus, and that the antibiotic accounts for the antagonism of S. hygroscopicus var.…”

Section: Antibiosis and Biocontrolmentioning

confidence: 99%

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

Doumbou¹,

Salove²,

Crawford³

et al. 2005

phyto

223

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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“…Streptomyces spp. have been described as rhizosphere-colonizing bacteria and antifungal biocontrol agents useful in controlling fungal root diseases, and able to work in vitro as producers of siderophore and plant growth-promoting hormones (Rothrock and Gottlieb, 1984;Miller et al, 1990). PGPRs are free-living bacteria that have beneficial effects on plants.…”

Section: Plant Growth Promoting Rhizobacteriamentioning

confidence: 99%

Plant growth promoting rhizobacteria and their potential for biocontrol of phytopathogens

Ramadan¹,

Abdel-Hafez²,

Hassan³

et al. 2016

Afr. J. Microbiol. Res.

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Growth promotion and disease control by rhizobacteria are complex interrelated processes that involve direct and indirect mechanisms. The mechanisms include synthesis of some metabolites (auxin, cytokinin and gibberellins), induction of 1-aminocyclopropane-1-carboxylate (ACC) deaminase, production of siderophore, antibiotics, hydrogen cyanide hydrogen cyanide (HCN) and volatile compounds. They also include mineral solubilization competition, and induction of systemic resistance. These bacteria are suitable as soil inoculants because they have the potential for rapid and aggressive colonization. This feature alone is characterised as a disease control mechanism, which prevents the invasion of detrimental soil microorganisms onto the root surface. Inoculant-based plant growthpromoting rhizobacteria (PGPR) is applied extensively on agricultural crops to improve plants' growth and simultaneously reduce chemical inputs like fertilizer and pesticide which can cause environmental degradation. The structure of the rhizobacterial community is affected by several factors including plant genotype and is determined by the amount and composition of root exudates. In addition, soil type and fertility are the contributing factors that shape the community. This form of communication can affect plants' growth, nutrient status and also susceptibility to stress and pathogens in the host plant. PGPR inoculants cause diverse beneficial interactions among plants, which leads to sustainable and environment-friendly agriculture. The application of rhizosphere soil of agricultural crops with desirable bacterial populations is considered promising in both laboratory and greenhouse experiment. Further, a clearer understanding of the way PGPRs promote plants' growth can lead to expanded exploitation of these 'biofertilizers' in order to reduce the potential negative environmental effects associated with food and fiber production.

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Role of antibiosis in antagonism of Streptomyces hygroscopicus var. geldanus to Rhizoctonia solani in soil

Cited by 157 publications

References 0 publications

Recent Developments in the Maytansinoid Antitumor Agents

Recent Developments in the Maytansinoid Antitumor Agents

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

Plant growth promoting rhizobacteria and their potential for biocontrol of phytopathogens

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