[Effect of calcium and light on the development of Iodophanus carneus]

Ca2+ affects the mycelial morphological characteristics in I. carneus, modulating the development and conditioning the sexual differentiation. In Ca2+ 0 mM there was an interaction with light and development, in darkness the colonies did not reach the edge of Petri dishes and spiral growth was observed. In darkness the number of hyphae/mm was greater than those grown in light, except in Ca2+ 1 mM, at 28 mm of inoculum, and Ca2+ 2 mM, at 16 and 28 mm, where the number of hyphae/mm was greater. In cords and apothecial number and location a similar behavior was observed, evidencing a direct relation between these, Ca2+ concentration and light.