Email this article The content of photosynthetic pigments in the leaves of «healthy» and «weakened» balsam poplar trees (Populus balsamifera L.) growing under conditions of industrial pollution (Republic of Bashkortostan, Sterlitamak industrial center)
- Authors: Giniyatullin R.K.1, Ivanov R.S.1, Tagirova O.V.2,1, Kulagin A.Y.1,3
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Affiliations:
- Ufa Institute of Biology of the Ufa Federal Research Centre of Russian Academy of Sciences
- Akmulla Bashkir State Pedagogical University
- Ufa State Petroleum Technological University
- Issue: Vol 11, No 1 (2022)
- Pages: 43-48
- Section: Biological Sciences
- URL: https://journals.rcsi.science/2309-4370/article/view/108321
- DOI: https://doi.org/10.55355/snv2022111104
- ID: 108321
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Abstract
The paper presents the results of studies on the assessment of the relative vitality of balsam poplar (Populus balsamifera L.) plantations under the conditions of polymetallic pollution of the Sterlitamak Industrial Center (SIC). Poplar plantations of the sanitary protection zone of the SPC are classified as «weakened». External signs of oppression are manifested in a decrease in crown density, an increase in the number of dead branches, damage to the assimilation apparatus by chlorosis and necrosis. Trees belonging to the «healthy» category grow in the plantations. It was shown that the average content of chlorophylls (a + b) in the leaves of «healthy» poplar trees varied from 25,0 to 28,0 µg/cm² of fresh weight, while in «weakened» trees it was relatively low and amounted to 17,2–22,6 µg/cm² wet weight. The decrease in the total content of chlorophylls and the deterioration in the relative vitality of trees are interrelated. It has been established that during the period of active leaf growth (in June and early July), a high content of chlorophylls and nitrogen balance index (NBI) is noted in the leaves of both «healthy» and «weakened» balsam poplar trees. The relationship of the indicators under consideration is confirmed by the regression equations of the polynomial function (y = −2,15x² + 8,05x + 23,2; y = −2,35x² + 8,75x + 19,9 for the leaves of «healthy» trees; y = −3,1x² + 11,1x +13,4; y = −3,9x² + 14,1x + 10 for the leaves of «weakened» trees), as well as determination coefficients (R² = 1 for the leaves of «healthy» trees; R² = 1 for the leaves of «weakened» trees). The maximum differences in the ratio of chlorophyll content (a + b) and nitrogen balance in the leaves of «healthy» and «weakened» poplar trees were noted at the end of August. During the growing season, in the leaves of «weakened» trees, compared with the leaves of «healthy» poplar trees, a decrease in the values NBI and the content of chlorophylls is observed. At the same time, there are no significant changes in the content of chlorophylls on the adaxial and abaxial sides of the leaves of «healthy» and «weakened» balsam poplar trees during the growing season.
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##article.viewOnOriginalSite##About the authors
Rafak Khizbullinovich Giniyatullin
Ufa Institute of Biology of the Ufa Federal Research Centre of Russian Academy of Sciences
Email: grafak2012@yandex.ru
doctor of agricultural sciences, senior researcher of Forest Science Laboratory
Russian Federation, UfaRuslan Sergeevich Ivanov
Ufa Institute of Biology of the Ufa Federal Research Centre of Russian Academy of Sciences
Email: ivanovirs@mail.ru
candidate of biological sciences, senior researcher of Plant Physiology Laboratory
Russian Federation, UfaOlesya Vasilyevna Tagirova
Akmulla Bashkir State Pedagogical University; Ufa Institute of Biology of the Ufa Federal Research Centre of Russian Academy of Sciences
Email: olecyi@mail.ru
candidate of biological sciences, associate professor of Ecology, Geography and Natural Resource Management Department, researcher of Forest Science
Laboratory
Aleksey Yuryevich Kulagin
Ufa Institute of Biology of the Ufa Federal Research Centre of Russian Academy of Sciences; Ufa State Petroleum Technological University
Author for correspondence.
Email: coolagin@list.ru
doctor of biological sciences, professor, Head of Forest Science Laboratory; leading researcher of Monitoring Climate Change and Carbon Balance of Ecosystems Laboratory
Russian Federation, Ufa; UfaReferences
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