Research the plants photosynthetic activity depending on the high-rise gradient

Studied the fluorescent characteristics and quantitative characteristics of photosynthetic pigmentary complex in leaves of birches ( Betula pendula Roth. and Betula litwinowii Doluch), growing at the heights of -28 and 1800 m above sea level. Reduction of the maintenance of chlorophyll a on the high-rise profile that we connect with intensive insolation in mountains, their destruction in extreme environment – dispersion of daytime and night time temperatures, high level of ultra-violet radiation is revealed. The increase in maintenance of carotinoids on high-rise gradient is noted.