Seed germination (in laboratory and field conditions) and vegetative reproduction (by cuttings) of a promising decorative species-Lonicera tatarica L.(Caprifoliaceae Juss.) was studied for the first time in the conditions of introduction of the Tashkent Botanical Garden of Uzbekistan. Thus, the optimal temperature for germination of L. tatarica seeds in laboratory conditions is +20˚C + 22˚C, at which germination was 73%. The germination rate of seeds sown in autumn in the field was 62%, and the germination rate of seeds sown in spring was 71%. It was noted that in greenhouse conditions at an air temperature of 20˚C -22˚C and a relative humidity of 49% -53%, the rootability of cuttings was 75%. It was revealed that the studied species adapted well to the conditions of introduction. Taking into account the effectiveness of vegetative reproduction of L. tatarica, it can be recommended for improving the aesthetic condition and landscaping of cities, landscaping and landscape design.
The article provides a review of studies of the vegetation cover of the Western Tien Shan of the NorthEastern slope of the Kurama ridge of the Parkent district (the left bank of Parkentsai) with the participation of the rare endemic species Juno orchioides. The article presents the main results of work in the field of geobotany and botanical geography carried out in the Tashkent region. A list of plants of 4 communities of the herb-shrub association with the participation of the species Juno orchioides is given. The association contains more than 90 species of plants. Of these, trees – 10, shrubs – 9, perennials – 71, annuals – 8. Anthropogenic factors and grazing are the reason for the decrease in this species of Juno orchioides, and in the future, measures for reintroduction must be applied to preserve and restore this species.
The anatomical structure of the leaf of the Central Asian endemic species of Juno vicaria, growing in two different ecological conditions (Baysun Mountains of Surkhandary region and Tashkent Botanical Garden of Uzbekistan) was analyzed and diagnostic signs were determined. Also identified are adaptive mesomorphic and xeromorphic signs from an environmental point of view. A species that grows in natural habitat is dominated by more xeromorphic signs: a thickened outer wall of the epidermis; numerous epidermal, spongy cells; submerged stomata; small, multi-row sclerenchymal and collenchymal cells, which indicate a more xeromorphic and adaptability, as well as the wide distribution of this species to the natural growing conditions. In a species growing under the conditions of introduction of the Tashkent Botanical Garden, more mesomorphic features predominate: thin-walled, large, few epidermal, spongy cells; not immersed stomata; large non multi-row sclerenchymal and collenchymal cells, which show that the species is adapted to altered habitat conditions.
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