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Morphological and colour mutants of Trichoderma viride: characterization and complementation.

A Fargasová, M Sipiczki, V Betina

    Folia Microbiologica
    |January 1, 1985
    PubMed
    Summary

    Researchers characterized 26 Trichoderma viride mutants, grouping them by morphology and conidiation. Complementation analysis revealed only heterokaryotes form after fusion, with no nuclear migration or diploidization in these fungal mutants.

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    Area of Science:

    • * Mycology and Fungal Genetics
    • * Plant Pathology and Biological Control

    Background:

    • * Trichoderma viride is a widely studied fungus with agricultural applications.
    • * Understanding genetic variability in T. viride is crucial for optimizing its use.
    • * Characterization of mutants aids in elucidating fungal developmental pathways.

    Purpose of the Study:

    • * To characterize morphological and color mutants of Trichoderma viride.
    • * To investigate genetic complementation in T. viride through anastomosis and protoplast fusion.
    • * To determine the mechanisms of genetic exchange in T. viride.

    Main Methods:

    • * Isolation and characterization of 26 morphological and color mutants of Trichoderma viride.
    • * Grouping of mutants based on morphology, pigmentation, growth rates, and conidiation.

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  • * Complementation analysis involving anastomosis and protoplast fusion.

    • Main Results:

    • * Mutants were successfully categorized into three distinct groups.
    • * Complementation analysis demonstrated the formation of heterokaryotes after cell fusion.
    • * Evidence indicated a lack of nuclear migration and diploidization in the analyzed mutants.

    Conclusions:

    • * Genetic complementation in Trichoderma viride primarily results in heterokaryote formation.
    • * Nuclear migration and diploidization do not occur under the tested conditions in T. viride.
    • * These findings provide insights into the genetic behavior and reproductive strategies of T. viride.