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The aim of the scientific work is to identify the degree of salt tolerance of new tree-shrub species brought from various soil and climatic regions of the world, introduced and widely used in landscape arrangements on the Absheron peninsula of Azerbaijan. In connection with the expansion and development of urban development, greening arrangements are also expanded, the appearance of large cities changed, the number of new parks, boulevards and green spaces increased, especially in the coastal zones of the Caspian Sea embankments. The structure of the soil of the Absheron Peninsula is sandy, sandy-loamy, with low water retention capacity. The Absheron peninsula of Azerbaijan is characterized by a characteristic sign of arid zones. However, the soil composition remains unchanged, which is characterized by chloride-sulfate, sulfate-chloride and chloride-carbonate salinization. In the coastal zones, chloride-carbonate salinization predominates, mainly 1500–2000 m from the sea, mainly chloride – sulfate, and sulfate – chloride in the central part of the peninsula. Due to the degree of salinity, the degree of salt tolerance is different for different species of woody-shrub plants. In the natural flora of the peninsula tree species are completely absent, the species composition of shrubs is small, mainly are found ephemeral and ephemerid species of herbaceous plants. The objects of study were Magnolia grandiflora L., Cupressus macrocarpa L., Sophora japonica L., among shrubs Nandina domestica Thunb., Ligustrum japonicum Thunb., Jasminum nudiflorum L., Lisium chinensis Mill, Euonymus japonica L., Nerium oleander, new types of cypress trees, various types of palm trees, etc. It was revealed that, in saline soil of the Absheron peninsula, the degree of influence of salinizing ions (Cl−, SO42−, and CO32−) on the accumulation of chlorophylls in the leaves of new introduced species has a direct correlative relationship. Toxic ions affect the protein-chlorophyll bond, the destruction of chloroplasts, and a decrease in photosynthesis, resulting in the formation of chlorophyllide and phytic acid, which promotes the formation of burns on a leaf blade and reduced the photosynthetic productivity.

Relevance. High lycopene fruit content has been regarded as a very important genetic trait in tomato breeding. Use lycopene molecular markers in combination with conventional breeding techniques allowed us to create hybrids with high lycopene accumulation, excellent organoleptic qualities, high yield production and resistance to pathogens, and to effectively optimize our breeding programmes for commercial greehouses production.Material and Methods. In this study tomato samples including selected lines and hybrids with various allelic combinations of genes determining carotene accumulation, and other genetic traits, such as disease resistance and yield production were tested. Introgression of spontaneous and induced mutations was used to increase carotenoid levels (og and hp) and improve fruit technological qualities (nor, alc, rin). The research material was tomato collection, mutants, breeding lines and hybrids listed in the State Register Russian Federation tomato hybrids of breeding SS Agrofirm "Ilyinichna" VNIIO branch of the All-Russian Scientific Research Institute of Vegetable Growing – Branch of the FSBSI Federal Scientific Vegetable Center. DNA typing of fruit quality genes was performed at the Institute of Genetics and Cytology of the National Academy of Sciences of Belarus.Results. New domestic hybrids for industrial greenhouses, which characterised by improved organoleptic qualities and technological traits were developed with the help of phasedcross-breeding that allowed to combine the genes nor, rin, alc, leading to an extension of the shelf life with the genes B, og, hp1, etc., contributing to an increase in carotenoid content in fruits. It was established that for targeted selection and hybridization, despite the negative influence of the nor, rin, alc genes it is possible to raise the level of carotenoids to average values. Correlation between lycopene concentration in fruits and high temperature and level of insolation was confirmed. It was shown that pink-fruited forms contain significantly more lycopenethanred-fruitedones. Different all eliccombinations of structural genes involved in carotenoids biosynthesis and regulatory genes that provided maximal accumulation of lycopene in hybrid swithred and pink fruits were revealed. Hybrids with the combination of high concentrations of sugar (° Brix), dry matter and maximal lycopene values, combined defining excellent taste were selected: Prekrasnaiya lady, Olya, Quadrille, Victoria. New F1 hybrids one for industrial greenhouses: G950, G956, G960, Magistral and pink fruited G12897, surpassed the Dutch standard in productivity up to 21%, and in tastes/organoleptic qualities for 1-1.8 points.

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