Зміна забарвлення і вмісту фотосинтетичних пігментів у різновіковій хвої Picea pungens Engelm. в умовах міських насаджень
Objective – is to analyze the content of chlorophylls and carotenoids in the 1–4-year-old blue-coloured needles of Picea pungens Engelm. trees in street plantings of Kryvyi Rih city exposed to emissions of large metallurgical combine as well growing in non-polluted dwelling blocks of the city. Mater...
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| Datum: | 2019 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
M.M. Gryshko National Botanical Garden of the NAS of Ukraine
2019
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| Online Zugang: | https://www.plantintroduction.org/index.php/pi/article/view/972 |
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| Назва журналу: | Plant Introduction |
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Plant Introduction| Zusammenfassung: | Objective – is to analyze the content of chlorophylls and carotenoids in the 1–4-year-old blue-coloured needles of Picea pungens Engelm. trees in street plantings of Kryvyi Rih city exposed to emissions of large metallurgical combine as well growing in non-polluted dwelling blocks of the city.
Material and methods. We divided the trees into three groups at the age of less than 30 years, depending on the needle colouring: I – grey-blue, II – blue-green, III – weakly blue. The pigments of the needles were extracted by dimethyl sulfoxide, and the quantity of chlorophyll and carotenoids was defined using the spectrophotometer SF-2000.
Results. In all three groups, the highest content of chlorophylls a and b as well their sum was revealed in one-yearold needles (the maximum value was in the trees of the first group), the lowest one was in four-year-old needles. Blue colouring of the needles decreases with age, especially in 3–4-year-old needles of the trees from the second and the third groups. The content of carotenoids increases with the age of the needles, the maximum is in four-year-old ones. Emissions of the metallurgical combine influence blue colouring of 2–4-year-old needles, decreasing its intensity; but this characteristics, firstly, depends on genotype peculiarities of the plants.
Conclusions. P. pungens with blue-coloured needles is stable and highly decorative in conditions of a large industrial city of the steppe zone, therefore it has good perspectives to be used widely for greening of settlements in this zone. |
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