An Effect of the Controlled Burnout on the Content of Stress Proteins in Scots Pine Needles in the Conditions of Krasnoyarsk Forest Steppe
To compare the accumulation of heat shock proteins HSP (Heat Shock Proteins) with the intensity and duration of the temperature exposure, was studied the effect of experimental controlled burnout, simulating a low-level fire of low strength (while also recording the duration and temperature of the fire exposure), on the content of HSP in Scots pine needles (Pinus sulvestris L.) in stands of the I age group in the forest steppe zone of the Southern Siberia, both immediately after it and in the short-term post-fire period (2 and 5 days). It was discovered that at the time of controlled burnout equal 5.5–11.8 minutes. the crown was influenced by temperature in the range from 48 to 76°C. After 30 minutes after high-temperature exposure, the HSP content in the needles did not significantly differ from the control level. The highest content of HSP 101 and HSP 17.6, was found 2 days after burning. On the 5th day, the content of HSP 17.6 returned to its original level, the content of HSP 101 decreased slightly compared to the values on the 2nd day. The data obtained suggest that in the post-fire period, specific HSPs are synthesized in the needles cells, possibly due to their participation in repairing the tissues damaged by the fire.