The paper deals with abiotic environmental factors affecting the decorative effect created by plants belonging to various biomorphs in the conditions of the continental climate. The authors have identified some problems of Siberian landscaping. They are 1) insufficient knowledge by landscape architects of the ecological and biological features of trees and shrubs and their belonging to certain zones of frost resistance; 2) the use of ornamental plants with a short period of ontogenesis in landscape compositions; 3) insufficient involvement of late summer and autumn flowering perennial plants in landscaping. It is shown that the degree of winter damage of the aboveground shoot system of trees and shrubs is influenced not only by the absolute values of minimum temperatures, but also by the duration of their exposure. Methods of rejuvenation of ornamental plants from the family Ranunculaceae used in landscape architecture are proposed. As a result of long-term studies of the Chrysanthemum L. generic complex, including species, forms and varieties, conducted in the CSBG, a garden group of Korean chrysanthemums has been identified. Its representatives, characterized by average flowering periods and blooming at a day longitude of 13-14 hours, can significantly fill the period including September and even the first half of October with their ornamental effect. The characteristics of resistance and ornamental qualities of some species and varieties of plants included in the biological resource collection USU 44053 are given.
Paeonia obovata and Paeonia oreogeton belong to the monotypic family Paeoniaceae. Both are popular as ornamental plants. P. obovata and P. oreogeton have been introduced into Novosibirsk Oblast (Western Siberia) from Primorye (Far East). The aim of the study was to assess their adaptability as well as the effect of seasonal developmental stages on the accumulation of secondary metabolites and reserve substances in the leaves and rhizomes under the conditions of Akademgorodok (Novosibirsk, Russia). According to long-term data (15 years), P. obovata and P. oreogeton complete the entire growth cycle here, including flowering and fruiting. Both species exhibited abundant flowering, but in the first 3 years, P. oreogeton did not bloom; yet under the microclimatic conditions specifically selected for this species (a more shaded area), it started to bloom and fruit yearly. A biochemical analysis (by spectrometric method) of P. obovata and P. oreogeton grown in Akademgorodok showed that the leaves accumulate higher concentrations of flavonols (P. obovata: 1.77%), tannins (P. oreogeton: 16.42%), ascorbic acid (P. oreogeton: 155.2 mg/100 g), and sugars (P. obovata: 20.85%) as compared to the roots. Peony rhizomes contain higher concentrations of protopectins (P. oreogeton: 13.03%), saponins (P. obovata: 21.06%), and starch (P. obovata: 30.20%) than the leaves do. These data can help to increase the levels of these natural compounds in these species. Further investigation into the dynamics of accumulation of biologically active substances in the organs of peonies will help to identify introduced plant species having high biochemical potential for the pharmaceutical industry.
Levels of biologically active and reserve substances were investigated in the leaves and rhizomes of Paeonia anomala L., P. hybrida Pall., and P. lactiflora Pall. The peonies’ leaves are rich in ascorbic acid (1205.7 mg/100g in P. anomala) and tannins (15.9% in P. lactiflora and 15.7% in P. anomala) at the beginning of the growth season. Concentrations of flavonols, pectins, and carotenoids in the Siberian peonies are low at the beginning of the growth season. P. lactiflora is a promising species for further research on the set and levels of biologically active and reserve substances in rhizomes because this species stands out among the three Siberian species in terms of the levels of catechins (1297.8 mg/100g), protopectins (10.1%), saponins (19.2%), and sugars (22.1%) in rhizomes. In these parts of the plant, starch (18.6%) accumulates the most in P. hybrida among the studied peonies species. Concentrations of the analyzed substances in the rhizomes of the peonies change significantly by the end of the growth season and vary widely among these species. Levels of ascorbic acid (except for P. hybrida), protopectins, and starch increase significantly while concentrations of catechins and sugars decrease in the rhizomes by the end of the growth season.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.