Fusicoccin

Fusicoccin is an organic compound produced by a fungus. It has detrimental effect on plants and causes their death.

Fusicoccin is synthesized by the fungus Fusicoccum amygdali, which is a parasite of mainly almond and peach trees. It stimulates a quick acidification of the plant cell wall; this causes the stomata to irreversibly open, which brings about the death of the plant.