Morphophysiologic traits of spruce trees in conditions of Izhevsk

Influence of Pollution on Photosynthesis Pigment Content in Needles of Picea abies and Picea pungens in Conditions of Development of Iron Ore Deposits

“…It is known from earlier publications that pollutants weaken the accumulation of chlorophyll b more than chlorophyll a, which may reduce the activity of the photosynthetic apparatus and disrupt the metabolism of plants (Tuzhilkina et al, 1988;Lepedus et al, 2003). However, other researchers (Sergejchik, 2015;Bukharina et al, 2016), on the contrary, emphasize the predominance of quantitative changes in the content of chlorophyll a in the pigment complex of conifers in urban areas; the content of chlorophyll b remains relatively stable. In our case, the second variant of the dynamic changes of the pigment complex is confirmed: the increase in the level of pollution of the urban environment more significantly decreases the amount of chlorophyll a than b.…”

“…It was found that increased concentrations of air pollutants lead to a decrease in the ratio of chlorophylls and to an increase in the concentration of carotenoids (Bessonova, Ponomar' ova, 2017). In particular, an increase in the concentration of carotenoids in the needles of P. pungens in response to air pollution was detected in various macroclimatic conditions (Bukharina et al, 2016;Starikova et al, 2016;Bessonova, Ponomar' ova, 2017). Thus, the content of carotenoids in the needles of the introduced plantings of P. abies from the Arboretum of the Ussuriisk, where the air can be considered relatively "pure", amounted to 0.19-0.22 mg/g of wet weight (Titova, 2010).…”

“…Investigations on the pigment complex of coniferous plants in Izhevsk have proved that Picea pungens is characterized as a species more resistant to air pollution than P. abies, as the reaction of the first species pigment complex to adverse environmental conditions is detected only in conditions of high air pollution (Bukharina et al, 2016). The highest content of chlorophyll a (0.9-1.2 mg/g of wet weight) was observed in introduced plantations of P. pungens in control territories, and the lowest (0.6-0.9 mg/g of wet weight) was observed in those in roadsides (Bessonova, Ponomar' ova, 2017).…”

“…It should be noted that the earlier studies of the pigment complex of coniferous plants under conditions of high air pollution (in the Russian city of Izhevsk) characterized P. pungens as a more stable species compared to P. abies because of the increased content of chlorophyll a (Bukharina et al, 2016). However, a number of researchers (Soukupova et al, 2001) observed that the needles of P. abies and P. pungens have the same degree of damages in response to atmospheric air pollution and the number of pigments in the latter species, on the contrary, is smaller.…”

Study of the Regularities of Inhibition by Organic Acids of the Enzyme Complex Wheat Germ

“…The higher their concentration, the greater the inhibitory effect. Applying the Linewiver -Burke method [31][32][33] and using the information presented in Fig. 1, we analyzed the functions 1/v and 1/[S].…”