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[Micro-morphological variation pattern of Isaria cicadae].

Wenbo Zeng, Chenxin Chang, Jianping Li

    Wei Sheng Wu Xue Bao = Acta Microbiologica Sinica
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    Morphological diversity in Isaria cicadae is primarily driven by within-strain variation, not geographical origin. This study reveals ample morphological diversity at the species level.

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    Area of Science:

    • Mycology
    • Entomopathogenic Fungi
    • Fungal Morphology

    Background:

    • Isaria cicadae is an entomopathogenic fungus with potential applications.
    • Understanding its morphological patterns is crucial for species identification and ecological studies.

    Purpose of the Study:

    • To elucidate the morphological patterns and variation within Isaria cicadae populations.
    • To analyze the contribution of different factors to morphological diversity.

    Main Methods:

    • Observation of 17 morphological characters across 75 strains from 15 populations.
    • Statistical analysis including descriptive statistics, nested analysis, and Q cluster analysis using SAS 8.1.

    Main Results:

    • Observed two types of asexual conidia, distinct conidiogenous cells, chlamydospores, and fusion hyphae.
    • High coefficients of variation (13.07–104.09%) indicated ample morphological diversity.
    • Nested analysis showed within-strain variation accounted for 73.44% of total variability.

    Conclusions:

    • Intraspecific phenotypic variation is the primary driver of morphological diversity in Isaria cicadae.
    • Morphological characters showed no significant correlation with geographical origin.