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Качество пыльцы сосны обыкновенной в условиях техногенного загрязнения среды выбросами Рефтинской ГРЭС

  • Махнева, С. Г.
Publication Date
Jan 01, 2016
Electronic archive of the Ural State Forest Engineering University
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Aim of the work was to study the process microgametogenesis and pollen quality diagnosis of Scots pine (Pinus sylvestris L.) tree stands formed under exposed Reft power plant fl ue emissions. In the area of Reft power plant airpollutants subsidence formed technogenic pollution areas that differ in the qualitative composition of pollutants snow cover and their quantitative parameters. The regularity reduced content in thawed snow water insoluble compounds that make up the suspended matter with distance from the airpollutants source. The highest content of water-soluble compounds found at a distance of 5, 8, and 14 km from the airpollutants source, signifi cantly lower – at the nearest and farthest points of the snow samples selection. Showed a reduction in pollen fertility values and the content of reserve substances in mature pollen of pine trees in a number of PP-1> PP-2> PP-3, and in the background the stand they grow. Pollen germination rate on the medium, on the contrary, increases in the direction of PP-1 <PP-2 <PP-3 and then falls below the PP-1. Indicator of the pollen tube length is the maximum value for the pollen PP-2. It was found the main contribution to the sterility of the pollen of pine pollen grains are made with cytological abnormalities, except for the PP in the background conditions, which is slightly higher proportion of small pollen grains. It was detected maximum frequency of pollen from cytological disturbances for PP-3 (2,9–16,3 times higher in comparison with other PP). Thus, pollen pool of Scots pine from technogenic pollution areas characterized by a high frequency cytomorphological and functional disorders. Therefore, the presence of Pinus pollen of the zones of technogenic pollution in reproduction may be a cause of reduced seed quality and viability of seed progeny. The identifi ed parameters of the pollen of Scotch pine (the frequency of small pollen grains, the amount of pollen grains with morphological anomalies, ramifi cation of pollen tube), which has prognostic value in terms of the level of technogenic load on ecosystems.

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