Effect on germination and post-germination development of Colletotrichum dematium var circinans due to light and dark incubation and coverslip placement.

Autor: Russo, Vincent, Anderson, Charles, Pappelis, Aristotel
Zdroj: Mycopathologia; Apr1979, Vol. 67 Issue 3, p165-168, 4p
Abstrakt: Light regime was not a major factor in germination of spores of Colletotrichum dematium var circinans. Number of germ-tubes and appressoria formed were affected by incubation regime and coverslip placement. Most germ-tubes and appressoria were produced on spores under shimmed coverslips. Light incubation favored germ-tube production and dark incubation favored appressoria production. Predicted time to 100% germination was affected by treatments. Shortest times were predicted for light incubated spores under shimmed coverslips. Longest times were predicted for non-coverslipped spores. A significant number of appressoria were produced sessile on spores. Most sessile appressoria were produced on dark incubated spores. Approximately 56 % of all spores germinated, and approximately 60% of all germ-tubes and appressoria were produced on these spores which were situated closest to coverslip or droplet edges. Placement of germ-tubes on spores was not affected by treatments. However, percentages of germ-tubes, initiated from various areas of spores, were significantly different. This variation appears to be due to factors internal to spores. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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