Biochemical Conditionality of Halophytes’ Differentiation by the Type of Regulation of Salt Metabolism in Prieltonye
O. A. ROZENTSVET1, V. N. NESTEROV1, E. S. BOGDANOVA1, G. N. TABALENKOVA2, I. G. ZAKHOZHIY2
1Institute of Ecology of the Volga River Basin, RAS, 445003, Togliatti, Komzinа str., 10
2Institute of Biology Komi Scientific Centre, UB RAS, 167982, Syktyvkar, GPS-2, Kommunisticheskaya str., 28
Keywords: адаптация, аминокислоты, белки, галофиты, засоленные почвы, липиды, пигменты, adaptation, amino acids, proteins, halophytes, saline soil, liрids, pigments
Abstract
The elemental composition, the content of pigments, proteins, liрids, free amino acids and antioxidants of 5 wild halophyte species in Prieltonye were investigated. Plants differed in systematic location (Chenopodiaceae, Plumbaginaceae, Asteraceae), the type of regulation of salt metabolism (eu-, cryno- and glycohalophytes), life form (annual grasses, shrubs), the water regime (mesoxerophytes, xeromesophytes). A decrease in the ion content of K, Na, Ca among Suaeda linifolia > Salicornia perennаns > Halocnemum strobilaceum > Limonium gmelinii > Artemisia santonica was noted. The reversed pattern was observed for the content of C. The increase in the total content of C in glyco-, cryno- and euhalophytes was accompanied by increased content of total and membrane liрids, proteins and pigments. Halophytes varied considerably in terms of components of the antioxidant system - the content of endogenous proline, soluble protein, liрid peroxidation and the level of total SOD activity. Cluster anаlysis revealed that the differentiation of the studied halophyte species by the type of regulation of salt metabolism was mostly determined by biochemical parameters.
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