Interaction of light quality and temperature on the vegetative reversion of conidiophores in Alternaria cichorii

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Abstract
The development of the conidiophores of the fungus A. cichorii Nattrass was induced by near UV irradiation (< 340 nm). Temperatures above 25.degree. C induced a vegetative reversion of conidiophores to sterile hyphae. This reversion was more intense under the influence of blue light (390-530 nm). The extent of vegetative regrowth was proportional to the incubation temperature: the higher the temperature the longer the vegetative regrowth of conidiophores.