Shataliuk H. Effect of gibberellin and retardants on growth processes, morphogenesis and gooseberry productivity

The application of gibberellins and retardants of different effects on the gooseberry culture led to the modification of source-sink relations in the plant, which was realized through anatomic-morphological changes of vegetative organs, the redistribution of assimilates and minerals towards the formation of plant yields. It is established that the influence of the applied preparations on photosynthetic productivity is realized due to changes in the leaf mesostructural organization. It is found that the preparations had a typical restraining effect on the anatomical structure of annual gooseberry shoots. Tebuconazole contributed to the increase in stem thickness, due to changes in anatomical organization: thickened bark, wood and core. We found that anatomical changes in fully formed shoots were accompanied by changes in the biochemical composition of both the reserve carbohydrates and structural biopolymers of shoots. Due to the effects of tebuconazole, the content of cellulose and lignin in shoots was the highest. It is important for increasing the plant frost resistance, the lignin content is also a test indicator of wood maturation. It is established that in ontogeny there is a redistribution not only of assimilates, but also of nutrients – nitrogen, phosphorus and potassium between vegetative organs of plants and berries. The most effective was the use of tebuconazole, which provided a yield increase without significant changes in product quality. Pre-harvest treatment of gooseberry plants with ethylene product esphon accelerated berry ripening, the accumulation of pectic substances in the fruit, intensified the hydrolysis of cellulose compared with the control variant. The action of the preparation also accelerated the breakdown of berry starch due to the increase in amylase activity, all forms of sugars and ascorbic acid accumulated more intensively, the overall acidity markedly decreased.