Ontogenetic structure of Thymus L. (Lamiaceae) coenopopulations in Yakutia

Evgeniya Talovskaya

doi:10.1051/bioconf/20181100039

Abstract

Ontogenetic structure of coenopopulations of four model species Thymus extremus, T. indigirkensis, T. brevipetiolatus and T. pavlovii widely distributed in Yakutia was studied. It was established that species coenopopulations were normal, most of them incomplete. Dependence of the type of the ontogenetic spectrum of coenopopulations on growth conditions and ontogenesis pattern was revealed in thymes of different biomorphs. The bimodal type of the ontogenetic spectrum (monocentric dwarf subshrub T. extremus) is conditioned by irregular seed regeneration and lack of ripe and old generative stages. Formation of the left-side type of the ontogenetic spectrum is governed by the emergence of vegetative propagation of individuals (unobvious polycentric dwarf subshrub T. brevipetiolatus and dwarf semishrub T. indigirkensis) and substrate features (distinct polycentric dwarf semishrub T. pavlovii).

Highlights

Searching for ways of rational nature management has become increasingly important [1, 2]
Medicinal properties of Thymus species are known since ancient times
Coenopopulations (CP) of four model species T. extremus, T. indigirkensis, T. brevipetiolatus, and T. pavlovii growing in different ecological-coenotic conditions of Yakutia were studied (Table 1)

Summary

Introduction

Searching for ways of rational nature management has become increasingly important [1, 2]. One of the criteria of assessment of the current status of coenopopulations of medicinal plant species is their ontogenetic structure [3]. Medicinal properties of Thymus species are known since ancient times. They possess disinfecting, analgesic and antiseptic activities. Growing in Central Yakutia [5], whereas data on the ontogenetic structure of coenopopulations of this and other species are absent. In this regard, the aim of the work was study of the ontogenetic structure of coenopopulations of model species T. extremus, T. indigirkensis, T. brevipetiolatus, and T. pavlovii in Yakutia

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Results