New Strategies for the Selective Isolation of Industrially Important Bacteria

Goodfellow, Michael; Williams, E. D.

doi:10.1080/02648725.1986.10647828

Cited by 51 publications

(30 citation statements)

References 148 publications

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“…Progress in molecular methods has enabled the detection and characterization of actinomycetes in soil without their cultivation. However, the isolation of pure cultures of taxonomically diverse actinomycetes is still important to understand their relative abundance in the natural environment and to find novel strains that produce useful compounds (Goodfellow & Williams, 1986). The actinomycete strains obtained in the present study could be important sources of novel bioactive compounds.…”

Section: Discussionmentioning

confidence: 97%

Diversity Analysis of Actinomycetes Assemblages Isolated from Soils in Cool-temperate and Subtropical Areas of Japan

et al. 2010

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The taxonomic diversity of actinomycetes from soils in a cool-temperate area (74 samples from Rishiri Island) and a subtropical area (94 samples from Iriomote Island) of Japan was compared. Soil samples were treated with five different pre-treatment methods and subsequently cultured on humic acid-vitamin agar, resulting in the selective isolation of 1,234 actinomycete strains. These isolates were classified using 16S rDNA sequence analysis. 16S rDNA sequence similarity values of 97% and 98:7% were tentatively used to identify isolates at the genus and species ranks, respectively. The actinomycete assemblages isolated comprised diverse species. Specifically, 668 of the Rishiri isolates fell into 17 families, 40 genera, and 178 species, and 566 of the Iriomote isolates belonged to 21 families, 59 genera, and 194 species. Diversity analyses based on the Shannon index revealed that there was no significant difference between the species diversity of the Rishiri isolates and that of the Iriomote isolates. However, there was little taxonomic overlap between the Rishiri isolates and the Iriomote isolates, as only 66 of the species occurred in both groups. Several species that were reportedly isolated from other tropical areas were found among the Iriomote isolates but not among the Rishiri isolates. This result suggests that climate may influence the species types of soil-inhabiting actinomycetes.

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Section: Discussionmentioning

confidence: 97%

Diversity Analysis of Actinomycetes Assemblages Isolated from Soils in Cool-temperate and Subtropical Areas of Japan

et al. 2010

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“…They are important in the turnover of matter and are even of considerable industrial importance (5,10). Traditional classification and identification of species were based largely on morphological criteria, particularly on spore shape, size and location within the sporangium (14, 41) but further developments in Bacillus taxonomy, including physiological tests, revealed the inadequacy of morphological tests for classification (11,12).…”

Section: Kampfermentioning

confidence: 99%

Application of miniaturized physiological tests in numerical classification and identification of some bacilli.

Kämpfer

1991

J. Gen. Appl. Microbiol.

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“…About 70% of the explored actinomycetes were found to be species of Streptomyces. They have the capacity to produce significant compounds, especially antibiotics, insecticides and pigments, due to their extra-large DNA complement (Goodfellow and Williams, 1986). They follow a special metabolic pathway, which includes the formation of glycosides and uses the shikimate pathway to aromatic compounds.…”

Section: Actinomycetes and Its Metabolitesmentioning

confidence: 99%

Microbial agents against Helicoverpa armigera: Where are we and where do we need to go?

Vijayabharathi¹,

Kumari²,

Gopalakrishnan³

2014

Afr. J. Biotechnol.

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Plants are prone to various biotic stresses in nature by bacteria, viruses, fungi, parasites, harmful insects and weeds. The biggest percentage loss (70%) in plants is attributed to insects. Lepidoptera is one such diversified phytophagous insect group, which include Helicoverpa armigera, a key pest of many food crops including chickpea, pigeonpea, pea, lentil, chillies, sunflower, tomato, tobacco and cotton. Controlling this insect has been a big task for farmers leading to the manufacture of a plethora of pesticides. However, over reliance on chemical pesticides has resulted in problems including safety risks, environmental contamination, outbreaks of secondary pests, insecticide resistance and decrease in biodiversity. Hence, there is an urgent need for the development of eco-friendly methods such as entomopathogens, antagonist or competitor populations of a third organism and botanicals to suppress H. armigera. Also, many compounds from microorganisms have been found to be effective in crop production, and these have a role in controlling H. armigera. The actinomycetes play an astounding role in controlling the key plant pathogens. They are the representative genera of higher microbial mass in the soil. Numerous studies have shown that these productive actino-bacteria can generate an impressive array of secondary metabolites such as antibiotics, antitumor agents, insecticides etc. This review emphasizes the mechanism behind resistance to insecticides along with actinomycetes and its potential as a biocontrol agent against H. armigera.

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New Strategies for the Selective Isolation of Industrially Important Bacteria

Cited by 51 publications

References 148 publications

Diversity Analysis of Actinomycetes Assemblages Isolated from Soils in Cool-temperate and Subtropical Areas of Japan

Diversity Analysis of Actinomycetes Assemblages Isolated from Soils in Cool-temperate and Subtropical Areas of Japan

Application of miniaturized physiological tests in numerical classification and identification of some bacilli.

Microbial agents against Helicoverpa armigera: Where are we and where do we need to go?

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