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Ontogenesis, estimation of coenopopulation state and component composition in Nepeta densiflora Kar. et Kir. (Lamiaceae) individuals of East Kazakhstan

Astashenkov, Alexey Yu., Cheryomushkina, Vera A., Myrzagaliyeva, Anar B., Medeubayeva, Balzhan Z.
TheInternational journal of environmental studies 2019 v.76 no.4 pp. 634-647
Nepeta, essential oils, germacrene, germplasm regeneration, indigenous species, morphogenesis, ontogeny, physicochemical properties, Kazakhstan
The paper presents the results of the complex study of main biological and chemical characteristics in the endemic species Nepeta densiflora which occupies the boundary position in the distribution of Spicatae (Benth.) Pojark.section of Nepeta genus. It has been established that the ontogenesis is complete and the individuals successively pass the morphogenesis stages: primary shoot → primary bush → clump → branching particle. Assessment of coenopopulation states has identified the studied population as normal and stable. Coenopopulation stability is determined by its seed regeneration and complex ontogenesis. Species existence under the studied ecological and coenotic conditions can be successful, provided that there is no phytocoenotic environment composed of turfed lady’s mantle community. In N. densiflora, the main components of the essential oil were found to be cis-trans-Nepetalactone (up to 70%), cis-β-Ocimene (4.8%), Germacrene D (3.1%) and β-Cyclocitral (2.4%).