Анотація:
At the early stage (5th day) of Pinus sylvestris infection with the monoconidial cultures of Heterobasidion annosum (Fr.)Bref. the quantity of carotine in them was on the same level with uninfected plants. On the 9-th day infected plants had similar or higher quantity of carotine and violaxantine compared with uninfected ones. It is suggested that a higher level of carotine and violaxantine of infected plants performs the protective function saving chlorophyllum a from oxidizing in the process of infection development.