A morphological and molecular perspective of Trichoderma viride: is it one or two species?

Article Abstract:

Trichoderma viride are identified as having warted conidia. However, two morphologically distinct types of conidial warts, type I and type II, have been found. Because each type corresponds to a unique mitochondrial DNA pattern, it has been questioned whether T. viride comprises more than one species. Combined molecular data, morphology, physiology and colony characteristics distinguish type I and type II as different species. Type I corresponds to true T. viride, the anamorph of Hypocrea rufa. Type II represents a new species, T. asperellum, which is close to T. hamatum.

Fungi, Morphology (Biology), Biodiversity, Species diversity

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Effect of corn and peanut cultivation on soil population of Aspergillus flavus and A. parasiticus in Southwestern Georgia

Article Abstract:

A research on the effect of peanut and corn cultivation on the population of Aspergillus flavus and Aspergillus parasiticus in three fields during three different years in southwestern Georgia shows that with enough rainfall during the growing season, the soil populations of A. parasiticus and A. flavus remains constant. A. flavus develops rapidly after harvesting when drought has afflicted the corn crop, but peanut seeds are in general more susceptible to these fungi.

Analysis, Aflatoxins

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In vitro analysis of the role of glucose oxidase from Talaromyces flavus in biocontrol of the plant pathogen Verticillium dahliae

Article Abstract:

The glucose oxidase produced by Talaromyces flavus suppresses microsclerotial germination in Verticillium dahliae, thus helping in the biocontrol of V. dahliae. When glucose oxidase is absent, the suppression of microsclerotial germination is lost. Inhibition is restored when glucose oxidase is added. Studies using a polyclonal antiserum preparation show that glucose oxidase is the only protein present in T. flavus culture filtrates.

Physiological aspects, Oxidases, Pathogenic microorganisms

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