Authors:
T. I. Fomina
Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract. The sustainability and productivity of plants under the culture depend on the stock of photosynthetic pigments. The stonecrops represent valuable ornamental, honey-bearing and medicinal plants promising for comprehensive study. The purpose of the study was to determine the content of chlorophylls and carotenoids in 8 species of the stonecrops during the growing season. Methods. The study was carried out in the Central Siberian Botanical Garden (Novosibirsk) in 2021. The objects were representatives of Aizopsis, Hylotelephium, and Sedum from the Sedoideae subfamily. The concentrations of chlorophylls a and b, as well as carotenoids, were determined in freshly harvested raw materials using the spectrophotometric method. The indicators were calculated on an absolutely dry weight of raw materials. Results. The highest pigment contents 110.6–590.8 mg% of chlorophylls and 42.1–112.8 mg% of carotenoids were found in the spring at the vegetation start. In summer, when growth processes slowed down during the flowering phase, the pigment stock decreased to according values of 31.6–233.0 mg% and 9.8–90.6 mg%. In autumn the concentrations of both chlorophylls and carotenoids in the green-wintering shoots increased significantly relative to the flowering phase, that ensured the accumulation of assimilates for the dormant period. The interspecific variability of the pigment ratio during the growing season reflect a different degree of shade tolerance, that is 1.5–3.0 for chlorophylls a/b and 0.9–5.3 for chlorophylls/carotenoids. Scientific novelty. Data on the quantitative content of photosynthetic pigments in the stonecrops were obtained. The results confirmed the literature data on the low pigment content for Sedoideae, due to the functional characteristics of the succulent life form. We have shown that the level of chlorophylls and carotenoids has specific features when adapting to the conditions of the forest-steppe of Western Siberia.
Keywords: Aizopsis, Hylotelephium, Sedum, stonecrops, chlorophylls a и b, carotenoids
Acknowledgments. The study was carried out within the framework of the state assignment for the project AAAAA21-121011290025-2 “Analysis of biodiversity, conservation and restoration of rare and resource plant species using experimental methods”. The author thanks the senior researcher of the phytochemistry laboratory of the Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences Tatyana Abdulkhailovna Kukushkina for performing phytochemical analyses.
For citation: Fomina T. I. Seasonal dynamics of photosynthetic pigments in the shoots of the stonecrops (Sedoideae). Agrarian Bulletin of the Urals. 2024; 24 (12): 1705‒1713. DOI: https://doi.org/10.32417/1997-4868-2024- 24-12-1705-1713. (In Russ.)
Download the full text of the article
