Abstract: The relationship between the calciumalmodulin (CaM) antagonists and the germination of fungus spores of corn leaf blight was studied by use of the fungus spores of corn leaf blight growing on the corn plants and reserved in a condition simulated artificially for about a year.In the experiment the improved Czapek's solution was used as a minimal medium.The research result showed that about 30% of spores could germinate very well without Ca²⁺,CaM antagonists and calcium chelating agents.When the spores was treated with the antagonists or the chelating agents,the germination was affected in varying degree owing to difference in sort of the agents and their concentration,and the higher the concentration,the lower the germination rate.If 3 mmol of Ca²⁺was added to the treating agents, the germination rate could be almost retured to same as that of the control.This showed that the effect of agents on the spores germination was not due to damage to the spores.The experiment result showed that the Ca²⁺ was necessary for the fungus spores of Corn leaf blight to germinate,and the germination process might be related to the CaM.

Key words: Calcium, Calmodulin, Antagonist, Corn leaf blight, Spore, Germination