Biopolymers and cell. 1996; 12 (3): 91 - 96

Participation of calcium ions in the process of mycelial dimorphism of Theielavia terrestris

E. N. Gromozova, I. S. Blazhchuk

Calcium ions are the intermediates between signals of external medium and cells' reaction. The influence of different salts of calcium on the morphogenesis of T. terrestris was studied. It was shown that different concentrations ofCaCl2, CaSO4, CaCO3, CatNO^)2 and Ca(Ca^COO)2 didn't change diffuse form of fungus. However, 15 mM of Cad? and 10 mM ofCaSO^ and higher concentrations of these salts switched over pellets growth to the diffuse one. The process was observed after CaCl? adding lag-phase of growth being sensitive to morphogenic signal. Morphogenic action of calcium ions was confirmed by the experi¬ments with usingof veropamil. On the basis of obtained with chlorpromasin data the calmodulin participa¬tion in this process is discussed. The calcium ions effect by means ofadenylate system on morphogenetical program of T. terrestris development is supposed.