Влияние температуры на рост и энергетический баланс молодых тканей борщевика Сосновского в условиях Севера

Abstract

Respiration and energy balance dependence on temperature in Heracleum sosnowskyi seedlings and buds tissues of were studied. The proportion of energy thermal dissipation in seedlings was only 20 % at a temperature of 2–5 °C. It demonstrates the energy storage effectiveness in young tissues and corresponds to soil temperature condition at a depth of buds allocation in the early spring, autumn and winter period (0, -1 °C). It was shown that the growth rate of buds was exponentially increasing at 5–30 °C in the spring. In autumn, during preparation to winter dormancy, the largest growth rate of buds is noted at 2–5 °C. The proportion of energy thermal dissipation in autumn buds was 20 %. This trait causes H. sosnowskyi adaptation to low temperatures in winter and high growth rates in early spring. In general, H. sosnowskyi plants metabolism is well adapted for northern part of temperate climate zone. The invasive species has potential opportunities to reach the northern taiga subzone and the forest-tundra.