Dependence of the tannin content on the phytocenotic confinedness of plants of the genus Erodium in Buryatia

УДК 582.751.2:581.192+633.88(571.54)

Abstract

The article presents data on the content of the amount of tannins in plants of the genus Erodium the family Geraniaceae. Two species: Erodium cicutarium and E. stephanianum grow in Buryatia. The purpose of the work is to determine the content of tannins in the aboveground and underground organs of plants of the genus Erodium and to identify the dependence of the tannin content on phytocenotic confinement in the conditions of Buryatia. The species grow in communities that belong to the communities of steppe tree-shrub vegetation - ilmovniki and communities of steppe vegetation type. The content of tannins in aboveground organs is higher (23.75 %) than in underground organs (10.44 %) of both species, regardless of the place of growth. Steppe representatives of the genus Erodium accumulate tannins in greater quantities (in the grass - 24.82 %, in the root system - 11.60 %) compared with representatives growing under elms (in the grass - 22.69 %, in the root system - 9.28 %). Erodium cicutarium, which grow in elms communities, concentrates tannins in the grass more (23.27 %), compared with E. stephanianum (22.11 %). On the contrary, there are fewer tannins in the roots (7.81 %) than in E. stephanianum - 10.74 %. E. stephanianum, which grows in steppe areas, accumulates more tannins in aboveground and underground organs (25.27 % and 12.18 %, respectively) than in hemlock crane (24.36 and 11.02 %, respectively).