Acyl Lipids and Lipophilic and Phenolic Compounds from Rare Plant Species
- PDF / 156,523 Bytes
- 4 Pages / 594 x 792 pts Page_size
- 93 Downloads / 177 Views
ACYL LIPIDS AND LIPOPHILIC AND PHENOLIC COMPOUNDS FROM RARE PLANT SPECIES
E. S. Bogdanova,1* V. N. Nesterov,1 L. M. Kavelenova,2 R. R. Sarvarova,2 S. V. Saksonov,1 and O. A. Rozentsvet1
Fifteen species of rare calciphyte plants growing in Samara Oblast were studied. The most variable of the studied quantitative parameters (acyl lipids, pigments, phenolic compounds) were lipids and phenolic compounds, in contrast to pigments and fatty acids. Keywords: acyl lipids, calciphytes, photosynthetic pigments, phenolic compounds. Rare plant species show consistent trends toward contracted numbers and/or areas, which gives them high scientific value. The flora of the middle Volga region comprises such species, many of which represent ecologically specialized plant groups. In particular, such plants include calciphytes, which have adapted to specific soil and climatic conditions and inhabit locations with exposed limestone, chalk, clays, and other carbonate rocks [1]. The chemical composition of the plants depends largely on the environmental conditions (temperature, humidity, etc.), plant species, development phase, and localization in certain organs [2]. The goal of the work was to study the qualitative and quantitative compositions of acyl lipids, fatty acids (FA), photosynthetic pigments, and phenolic compounds (PC) of rare plants growing in Samara Oblast. A total of 15 species from 11 families were studied: Artemisia salsoloides Willd., Anthemis trotzkiana Claus (Asteraceae); Pimpinella titanophila Woronow, Bupleurum falcatum L. (Apiaceae); Krascheninnikovia ceratoides (L.) Gueldenst. (Chenopodiaceae); Onosma volgensis Dobrocz. (Boraginaceae); Gypsophila volgensis Krasnova (Caryophyllaceae); Ephedra distachya L. (Ephedraceae); Astragalus zingeri Korsh., Hedysarum grandiflorum Pall. (Fabaceae); Linum flavum L., Linum uralense Juz. (Linaceae); Polygala sibirica L. (Polygalaceae); Reseda lutea L. (Resedaceae); Cotoneaster laxiflorus J. Jacq. ex Lindl. (Rosaceae). All plants were calciphytes with respect to ecology and rare and/or threatened species with respect to nature conservancy status [3]. Lipids were isolated from fresh leaves by extraction with CHCl3–MeOH. Each lipid class was analyzed separately by high-performance thin-layer chromatography (HPTLC). The acyl-containing lipids isolated from the calciphyte leaves were dominated by glycolipids (GL, ~51% of total lipids). The GL included monogalactosyl diacylglycerins (MGDG), digalactosyl diacylglycerins (DGDG), and sulfoquinovosyl diacylglycerins (SQDG) (Table 1). The GL composition of most species obeyed the trend DGDG > MGDG > SQDG. The quantitative dominance of DGDG over MGDG was apparently related to the specific habitat conditions of the calciphytes. Leaves of P. sibirica and B. falcatum had the highest amounts of GL with 11.8 and 9.5 for DGDG; 9.6 and 6.7 for MGDG, and 6.0 and 6.2 mg/g of dry mass for SQDG, respectively. These parameters for the other species averaged 3.0 for MGDG, 4.1 for DGDG, and 2.1 mg/g of dry mass for SQDG. The phospholipids (PL) included
Data Loading...
