[Influence of light of different spectral composition on growth characteristics of microscopic fungi]

The features of radial growth of three microscopic fungi species were investigated at illumination by yellow, blue, green and red light. The studied species of fungi differed by isolation site (some of them were isolated from the places of high radioactive pollution, others--from the places with background level of radioactivity) and pigmentation degree (melanin-containing and light-colored). The parameters of radial growth, which are the integral indexes of the fungal organism physiology state were investigated: radial growth rate, branching degree and summarizing index--the intensity of substrate consumption. It was shown that the melanin-containing fungi Cladosporium cladosporioides growth was twice more rapid in response to blue and yellow light. Whereas such light depressed growth of non-pigmented strain of the same species as compared to control. A light response of other pigment-containing species Hormoconis resinae was far less expressed, and the light-colored species Paecilomyces lilacinus had no response to any offered conditions of illumination.