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

ABSTRACT

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%).

KEYWORDS:

• Nepeta densiflora
• morphology
• ontogenesis
• coenopopulations
• component composition

Acknowledgements

This work was supported by the Central Siberian Botanical Garden, Siberian Branch, Russian Academy of Sciences, (Grant no.АААА-А17–117012610053–9) and the project “Development of biotechnological methods of endemic and medical plants conservation under in-vitro conditions”, Republic of Kazakhstan, 2015–2017.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Central Siberian Botanical Garden, Siberian Branch, Russian Academy of Sciences, [Grant no.АААА-А17–117012610053–9].