FUNCTIONAL ACTIVITY OF THE APRICOT (PRUNUS ARMENIACA L.) CULTIVARS PIGMENT COMPLECS INTRODUCED INTO THE KYIV REGION

DOI: 10.35205/0558-1125-2022-77-36-40
UDC 634.21:631.526.32:581.1:477.41

D.G. MAKAROVA, V.I. VASYLENKO, N.V. MOISEICHENKO, PhDs
O.O. IGNATENKO, Leading Agronomist
Institute of Horticulture, NAAS of Ukraine, 03027, Kyiv-27, str. Sadova, 23, e-mail: olga-s-l@ukr.net

It is the search of apricot cultivars, detailed studies and selection of the given crop plants which are more adapted to the complex of the bio- and abiotic environmental factors of a certain growing region that contribute to the increase of the economic efficiency of the researched crop fruits producing without essential capital investments into the technology. The express small invasive instrumental method of the protofluometry diagnostics enables to accelerate considerably the introductory and productional appreciation. The authors present the informative results of the functional diagnostics of five promise apricot cvs planted in 2019 (Jumbo coat, Rosy Rutbar, Tsygledi Biber (middle-ripening) and Siaivo (late-ripening)) under the conditions of the Right-Bank Part of the Ukraine᾽s Lisosteppe. The inland variety Siaivo bred at the Institute of Horticulture of the NAAS is used as control. The improvement of the apricot pigment complex work effectivity was fixed by the instrument «Floratest» in 2020 after the treatment of the orchard from weeds with the preparation «Glifosat». Its afteraction was characterized with more efficient work of the electrone-transport chain and slower supersaturated of the photosystem II reactionary centers. In 2021 the plants distinguished themselves for the very high functional activity which was higher than the analogous one in the previous season. It was reflected drawingly by the general smoothing of certain floral flashes, high intensity of the photochemical processes when the first and second maximum fluorescense waves and rather quick drawing outgoing to the stationary level. Generally during the two investigations years such cultivars as Jumbo Coat, Rosy Rutbar and Hargrand distinguished themselves for the high functional activity level, leaves pigment complex and adaptivity to the abiotic environment factors influence. Among the other experiment variants Jumbo Coat was characterized in 2020-2021 with greater susceptibility to main apricot fungal diseases causative agents. It decreased its per cent of the fruits infructescense. All the trees of the above enumerated cvs had high potential productivity. It is confirmed by the field explorations, in particular, the plants bent to the establishment of the great number of floral buds even in the period of the fruitbearing beginning when their productivity potential only formed.

Key words: apricot, cultivar, functional, diagnostics, potential productivity, leaves pigment complex.

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