It has been done the analysis of the coniferous arboreal plants in the Primorsky Park of the Nikitsky Botanical Gardens. On the base of making of an inventory work it was defined the total amount of coniferous trees taxons, their distribution on families, flora-geographical regions and a summer drought stability level. The estimation of state and cultivation peculiarities of the ornamental plants in the condition of the Primorsky Park testifies about the ability to use effectively the drought-resistant coniferous species in the gardening and greening of inhabited localities in the Southern Coast of the Crimea. To sum it up, working out the methods and planning the reintroduction of coniferous plants from the Arboretum dendrology collection have to be based on the complex estimation of the bioenvironmental characteristics of particular taxons and discovery of the limitative factors, which have a negative influence on their growth and development in the conditions of the lower tier of the Southern Coast of the Crimea.

The characteristic of the habitat of Berberis julianae C.K.Schneid and of bioenvironmental properties of this species has been provided. The assessment of dendrometric parameters of individual plants at the territory of the Arboretum’s parks has been conducted. The issues of agrotechnics of maintenance of and caring for plants in the collection plantings of the NBG have been considered. The decorative properties and their seasonal dynamics have been described.

The article specifies some decorative characteristics of Taxus L . species and cultivars and introduces a project of a certain Taxus exposition supposed to be in the Primorsky park of the Nikitsky Botanical Gardens (NBG). In this way the work includes a list of various Taxus L. forms and companion plants recommended to complicate the composition and intensify the area ornamentality.

Water objects and their importance in landscapes of southern parks are considered in the article. This work also covers descriptions and characteristics of all water objects located on the territory of Nikita botanical gardens (4 parks).

The results of the accumulation of rosmarinic acid and other phenolic compounds in the aboveground mass of Prunella vulgaris L., which grows under natural conditions in the territory of the Republic of Abkhazia, are presented. Raw material is collected in the phase of mass flowering of plants in phytocenoses at an altitude of 5 to 1900 m above sea level. Variation of rosmarinic acid within the limits of 37.25 - 78.94 mg / dm³ was noted, its maximum content was noted in the aboveground weight of plants at an altitude of 1,873 m above sea level. With the increase in altitude, the content of quercetin-3-O-glucozide is increased, the content of coffee acid and routine decreases. The amount of quercetin and chlorogenic acid does not reveal dependence on the location of plants at different altitudes above sea level.

The data on Hyssopus officinalis L. (white flower form f. albus , blue flower form f. cyaneus , pink flower form f. ruber ) essential oil mass fraction in various plant organs are presented. The content of essential oil in the aboveground raw biomass, leaves, stems and inflorescences is described in details. The percentage of essential oil content in leaves, stems and inflorescences is presented.

Psychophysiological state and cardiovascular system indicants of the elderly during 10, 20 and 30 minutes use of lavandula angustifolia essential-oil with 1mg/m³ strength were studied. It was shown that psychoemotional state during 10, 20 and 30 minutes use of the essential-oil got better, which stimulated for relatively simple work after 10 and 20 minutes use of lavandula angustifolia essential-oil and a hypotensive action during 10, 20 minutes use of lavandula angustifolia essential-oil with 1mg/m³ strength.

The influence of essential-oils of pepper mint Udaychanka variety and water mint Oksamitova variety on psychophysiological state of the elderly during 20 minutes use with 1 mg/m³ strength was studied. The essential-oil of water mint Oksamitova variety exerted a positive significant influence on psychoemotional state by an evidential decrease of depression, overall condition improvement, well-being, attentiveness and increasing of working capacity, as well as a hypotensive action on cardiovascular system of the elderly with hypertonia disease. The essential-oil of pepper mint Udaychanka variety caused the increasing of working capacity and attentiveness, and helped to normalize measurements of cardiovascular system oа the elderly with hypertonia disease.

Morphogenesis features of the explants of essential oil rosa cultivar Raduga, depending on virasole concentrations (5.0-25.0 mg / l) in a culture medium and the duration of in vitro culture, were revealed. It was shown that chemotherapy in vitro with sequential cultivation of meristems (4 weeks) and then shoot tips isolated from the developing shoot (4 weeks) resulted in a decrease by 1,2-2,7 times in the number of developing explants, as well as the number of buds, leaves and shoot length. Maximum reduction of morphogenetic parameters compared to control was occurred with introduced into the culture medium 20,0-25,0 mg /l virasole and after 2 months of chemotherapy. With further micropropagation the development of viable shoots were almost indistinguishable from control. Obtained data indicate the possibility of chemotherapy for essential oil rose at cultivation of explants during two months on culture media with the addition of virazole in a concentration up to 25.0 mg / l.

The article provides information about the discovery of a new species for the flora of the Crimea - Allium ursinum to be supplied L. subsp. ucrainicum Kleop. et Oxner. It describes in detail the habitat, the plant communities with participation of species, and the size and position of the vectors in the sales part of the gradients, and optimal packing density of species on gradients of factors, conditions and factors-resources.

Flora of hepatics of a natural reserve Castel located on the South Coast of the Crimea has been investigated. An annotated list of hepatics of Castel Mountain was compiled. It is based on literature records and our own collecting of specimens. The high occurrence of liverworts (42%) in the investigated territories of the Crimea has been found, and it determines a significant conservation value of the reserve.

From 2007 to 2015 representatives of age groups of two populations of obligatory petrophyte Lagoseris callicephala have been observed. This species distinguishes by binary ecological nature: plants are able to grow as at in rocks’ splits so on colluvial debris of taluses. The structure and dynamic of aging groups are interesting for revealing of basis population repertoire’s features and rare specie’s development in environmentally contrast conditions of lithogenous landscape on different types hillsides.

Some physiological and biochemical changes in the leaves of the studied olive cultivars under the pressure of negative temperatures and various moisture supply were revealed. It was demonstrated that water deficit in the range of 13-20% adversely affects O. europaea cultivars frost resistance. Under controlled conditions, it was found out that water deficit decrease led to frost resistance increase. Along with the development of low-temperature stress, enzyme activity in the low resistant olive cultivars decreased. In the cultivar Nikitskaya enzyme activity increase was accompanied by a significant resistance increase that was evidenced by the absence of low-temperature damages.

The article presents the results of the introduction study of two samples of the Ruta L. of the FSFIS «The Nikita Botanical Gardens - National Scientific Center of RAS» collection. In the source material the following characteristics were studied: the phenology, the mass fraction of essential oil, the component composition of essential oil. One highly productive sample of plants of the genus Ruta was isolated. The chromatograms of the essential oil of the samples under study are given in the article.

The figs of the Lardaro variety are characterized by a high content of pectin substances, phenolic compounds and essential elements.

The results of frost resistance studies in Oleae europaea cultivars and some species of Oleaceae ( Jasminum , Ligustrum ) and Caprifoliaceae ( Lonicera , Abelia ) families are presented. Noted types of frost damages were characterized. It was found out that a high frost resistance was characteristic of J. nudiflorum and Ligustrum lucidum (Oleaceae) as well as Lonicera pileata and Lonicera fragrantissima (Caprifoliaceae).

The dynamics of change of optimum net - a photosynthesis, a transpiration, temperature of a leaf and factors of an external environment throughout the period of vegetation (August-October, 2016) was studied. Best value of Pn for Laurus nobilis L. during August-October period decreased by 21%, intensity of a transpiration for 40%, air temperature for 16%, an air humidity deficit for 87,14%, leaf temperature for 26% and illuminance for 17,8%. For Nerium oleander Pn during this time it decreased by 51,73%, intensity of a transpiration - for 78%, air temperatures - for 17%, an air humidity deficit for 89,14%, leaf temperature for 28,58% and illuminance for 31,58%. It was determined that if air temperature was above optimum the intensity of a photosynthesis sharply fell, for N. oleander it was equal to 36,5 °C, for L. nobilis it was equal to 32 °C. The wide range of their ecological plasticity with further saving a tendency of warming and climate aridization makes them competitive with the types having small ecological amplitude. The acquired information is an important potential characteristic of these types during creation of their ekologo-physiological passports.

During a research performance the various life processes of plants are observed: photosynthesis, transpiration, stomatal conductance, respiration, etc. by means of "photosynthesis Monitor PTM-48A". To calculate these parameters, you must know the area of the leaf (needles). In photosynthesis monitor this function is not incorporated. We developed a methodology and a technical device, allowed to perform these calculations directly in the configuration of experience. The calculation of the area for a tall juniper ( Juniperus excelsa M. Bieb.) is introduced as an example. This has allowed us to study the characteristics of water regime and drought resistance, hardiness, productivity of various types of plants and their relationship with environmental factors.

The article presents the results of a long-term research on peach cultivars under the conditions of the Crimean Southern Coast. There were studied links between peach yields and such environmental factors as average monthly, maximal and minimal air temperatures, precipitation, relative humidity during the blooming, degree of infestation with leaf curl and shot-hole disease, temperature in summer during fruit ripening time. A close correlation between yields and weather and climatic factors was detected using the example of peach cultivars Russkiy and Yunnat bred by the Nikitsky Botanical Gardens.

The "taste of fruit" in the combined sample of varieties and hybrids of apricot (n = 140) negatively correlated with "the number of days from flowering to maturation" r = -0.29 **, "titrated acids" r = - -0.86 * *, "Leukoanthocyanins" r = -0, 60 ** and positively with the "fetal mass" r = 0.40 **, "the sum of sugars" r = 0.58 **, "the sum of pectins" r = 0.13, "Sugar index" r = 0,72 **, the ratio of dry substances to titrated acids »r = 0.69 **, which is appropriate to take into account in the selection of this culture. We have identified 15 varieties, breeding forms and hybrids of P. brigantiaca x A. vulgaris, which are promising for the preparation of processed products.

The data of long-term studies for influence of weather-climatic factors on productivity of 4 apricot varieties under conditions on the South Coast of the Crimea have been analyzed in the article. The main limiting factors have been determined. The correlation and cluster analysis have been done to identify the features of the relationship between fruiting and environmental indicators. It is established that the variety Krymsky Amur bred in the Nikitsky Botanical Gardens (NBG-NSC) is the most adapted one to the conditions of the South Coast of the Crimea.

The study presents the tasting results shown by processing products of different peach cultivars bred by the Nikita Botanical Gardens. The chemical composition of fresh peaches and of products of their processing was determined. There were selected peach cultivars of Nikita Botanical Gardens, suitable for manufacturing of conservation products with maximum content of biologically active substances as well as with a high taste value: Chekhov A., Naslednik Stepi, Ostryakovskiy Beliy, Muza, Rassvet and Repin.

On the ground of a long-term research of Floribunda roses of the Nikitsky Botanical Gardens’ collection the peculiarities of their growth and development, as well as cultivation and use in ornamental horticultural of the Southern Coast of the Crimea have been revealed.

As a result of the analysis of long-term phenological observations, the cultivars of the lilac collection of the Nikita Botanical Gardens are divided into groups according to the timing of the beginning of flowering. It was revealed that in the conditions of the Southern coast of the Crimea the criterion for such distribution is the sum of effective temperatures of more than 5 ° C. For the early blooming cultivars (beginning of flowering, on the average, in the second- third decade of April), it ranges from 153 to 194 ° C, for cultivars blooming in the medium period (the third decade of April) - from 211 to 228 ° C, for cultivars that bloom into later varieties terms (the first decade of May) - from 247 to 283 ° C.

The article presents data of the study of the vegetative propagation capacity of 14 varieties of tulips garden class Triumph under the conditions of the steppe Crimea. The article presents the data on the coefficient of vegetative reproduction of bulbs of second reproduction for 5 fractions. Peculiarities of reproduction of the studied Tulip cultivars have been revealed.