NDLI: Morphological characterization and germination of aerial and submerged spores of the entomopathogenic fungus Verticillium lecanii

Content Provider	Springer Nature Link
Author	Feng, Kuo Ching Liu, Bing Lan Tzeng, Yew Min
Copyright Year	2002
Abstract	Under solid-state and liquid-state cultivations, the entomopathogenic fungus Verticillium lecanii F091 produced different types of spores. The aerial spores (AS) on cooked rice formed clusters on the tips of conidiophores, while the submerged spores (SS) were dispersed in the medium. The aerial spore appeared relatively uniform in size, which was 6.1 ± 0.9 μm long, and 2.2 ± 0.3 μm wide. The submerged spore varied in shape and size, with a mean length of 5.0 ± 1.0 μm and width of 1.9 ± 0.5 μm. Under scanning electron microscopy, the AS had a tendency to have rough, brittle surface characteristics; however, the SS appeared smooth on the surface. These spores were compared in two different germination media. On SMAY (Sabouraud maltose, agar, yeast extract, and neopeptone) coated coverslips, the AS did not show germ tubes until 8 h of incubation; while the SS showed many germ tubes. However, over 90% spore germination ratio was reached for both types of spores at 18-h of incubation. In the liquid medium, the SS germinated rapidly and many spores even produced spores on the spores; while the AS germinated, grew, and branched in the submerged culture gradually, and some sporulated on the tips of the short branches, or on the mycelia until 18 h of incubation. Evidently, the germination, growth patterns of aerial or submerged spores differed greatly under the different culture conditions. The virulence of the pathogen in relation to the type of spore of V. lecanii is discussed.
Starting Page	217
Ending Page	224
Page Count	8
File Format	PDF
ISSN	09593993
Journal	World Journal of Microbiology and Biotechnology
Volume Number	18
Issue Number	3
e-ISSN	15730972
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2002-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chemistry/Food Science Biochemistry Microbiology Animal Anatomy Morphology Histology Environmental Biotechnology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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