Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4558823 | Journal of Invertebrate Pathology | 2007 | 6 Pages |
Abstract
Three different germination types of conidia; unidirectional, bidirectional and multidirectional, were revealed through microscopic observations for eight Beauveria bassiana isolates germinated on Sabouraud dextrose agar. Canonical correlation analysis indicated that there is a positive correlation between unidirectional germination and virulence against diamondback moth, Plutella xylostella and the Colorado potato beetle, Leptinotarsa decemlineata. Scanning electron microscopy revealed different in vivo behaviors for unipolar- and bipolar-germinated conidia. Unipolar-germinated conidia produced a strong germ tube with mostly appressorium-like structures while bipolar-germinated conidia continued to invasive hyphal growth without any penetration, indicating that germination polarity in one way or another may be an indicator of pathogenic ability.
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Authors
Reza Talaei-hassanloui, Aziz Kharazi-pakdel, Mark S. Goettel, Shannan Little, Javad Mozaffari,