THE CONTENT OF THE BIOACTIVE SUBSTANCES IN THE LEAVES AND BULBS OF VICTORY ONION AFTER TREATMENTS WITH GROWTH REGULATORS

DOI: https://doi.org/10.29296/25877313-2018-05-08
Issue: 
5
Year: 
2018

O.M. Savchenko Ph.D. (Agricult.), Leading Research Scientist, Laboratory of Agrobiology and Selection, All-Russian Scientific Research Institute of Medicinal and Aromatic Plants (Moscow) E-mail: swamprat@rambler.ru L.N. Kozlovskaya Ph.D. (Biol.), Associate Professor, Department of Botany, Breeding and Seed Breeding of Horticultural Crops, Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (Moscow) Е-mail: lkozlovska@mail.ru

This paper presents the results of four-year experiments of researching of the features of exogenous growth regulators for plant’s adaptation to adverse conditions and increase the content of biologically active substances. The investigation of the dynamics of accumulation of ascorbic acid in the leaves of the victory onion showed a change in its content during the growing season, depending on the phase of ontogenesis and the use of various growth regulators. The significant fluctuations in the content of biologically active substances depending on the phase of phenology and weather conditions of the year were observed. The use of growth regulator zircon can increase content of ascorbic acid by 1.5-2 times compared to the control. The efficiency of the growth regulator zircon in high temperature environment due because oxycinnamic acids increase the resistance of plants to stress. The increased insolation is a strong stress for this type of onion; increased production of ascorbic acid is a protective reaction of the plant to stress. When lowering air temperature and increasing the amount of average monthly rainfall we can recommend using epin-extra. The content of flavonoids in bulbs, regardless of the environmental conditions of growth and applied regulators at the end of vegetation tends to increase. In the leaves the content of flavonoids as the leaves age begins to decline. This is due to the gradual outflow of plastic substances in the reserve organs of the plant. Growth regulators ribav-extra and epin-extra positively affect the increase in the content of flavonoids in leaves and bulbs of the victory onion. Depending on the climatic conditions during the vegetation season and destination of raw materials, these growth regulators can be used to produce products with a high content of biologically active substances. The application of the ribav-extra increases the content of flavonoids in bulbs of victory onion for 96,5-113,3%.

Keywords: 
victory onion
Allium victorialis subsp. platyphyllum (Hultun) Makino
growth regulators
ascorbic acid
flavonoids

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