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Germination polarity of Beauveria bassiana conidia and its possible correlation with virulence |
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| Authors: | Talaei-Hassanloui Reza Kharazi-pakdel Aziz Goettel Mark S Little Shannan Mozaffari Javad |
| Institution: | a Department of Plant Protection, College of Agriculture, University of Tehran, Karaj, Iran b Lethbridge Research Centre, Agriculture & Agri-Food Canada, Lethbridge, AB., Canada T1K 1A6 c Department of Genetics, Seed and Plant Improvement Institute, Karaj, Iran |
| 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. |
| Keywords: | Beauveria bassiana Conidial germination polarity Virulence Correlation Plutella xylostella Leptinotarsa decemlineata |
| 本文献已被 ScienceDirect PubMed 等数据库收录！ | |