USE OF NEW COMPOUNDS OF THE QUINOLINE SERIES AS GROWTH AND YIELD STIMULANTS OF AGRICULTURAL CROP

Background: Productivity is increased with breeding techniques and modes for obtaining highly productive cultivars, various agricultural activities, and the use of new technologies for growing planting material. Some of modes to increase productivity are simple. They use different growth stimulants. Many methods were developed to synthesize organic compounds that have stimulating biological activity and can be used as growth stimulants for agricultural crop. Aim: The purpose of this research was to study the effect of synthesized organic compounds of the general formula: 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline on growth indicators (by which we meant seed germination and plant height, length, width, and the number of leaves) and the yield of the agricultural crop. Methods: To identify the biological effects of the synthesized organic compounds, morphometric parameters of an annual vegetable crop (Solanum melongena L.) were selected. It is investigated seed germination, growth processes, and yield. Growth processes were studied by biometric indicators. Biometric indicators included the plant height, length, width, and the number of leaves. Results and Discussion: The most effective growth stimulators from compounds of the series 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline for common eggplant were revealed. The most effective substances for Solanum melongena are 1,2,2,4-tetramethyl-6-(1-piperidinylcarbothioyl)-1,2,3,4-tetrahydroquinoline hydrochloride and 4-[(1,2,2,4-tetramethyl-1,2-dihydro-6-quinolinyl)carbothioyl]-1-piperazinylcarbaldehyde hydrochloride in tested concentrations (0,01 %; 0,05 % and 0,1 %), as well as the compounds of the general formula: 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline in concentrations of 0,05 % and 0,1 %. It was established that the synthesized chemical substances cause stimulation of the eggplant growth compared with existing commercial preparation. Compounds of the series 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2- dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioil-1,2,3,4-tetrahydroquinoline increase the seed germination of Solanum melongena from 30 to 80 %, the vegetative mass - from 10 to 40 %, yield - from 28 to 46 %. Conclusions: Tetrahydroquinolines are most effective as stimulants of growth processes (and productivity) for common eggplant. Compounds containing a dihydro-6-quinolinyl substituent stimulate the growth and also increase the yield of Solanum melongena. The expediency of quinoline series compounds for the production of vegetable growing is shown. Used growth stimulators increase the adaptive potential of Solanum melongena.