Moira Forbes is the Executive Vice President of Forbes Media where she is responsible for programming and branding Forbes events worldwide and driving new business initiatives across the companyâs diverse media platforms.
geosmin, a sesquiterpenoid metabolite produced by soil living fungi. Some food commodities are liable to contamination by geosmin producing fungi. Under favourable environmental conditions the production of geosmin occurs. One of the producers of geosmin in fruits is Penicillium expansum which also produces the mycotoxin patulin. Recent reports indicate that geosmin production by P. expansum is stimulated by Botrytis cinerea.
Geotropism is a similar occurrence to phototropism where the plant exhibits directional growth in response to gravity. The shoot tip illustrates negative geotropism (grows against force of gravity) while the root tip exhibits positive geotropism (grows in the same direction as gravity).uxins also play a part in phototropism, an occurrence that involves plants bending or moving away from light. The shoot tip is responsible for directional movement by the plant in response to sunlight, as this is the area where auxins can be found.