Keywords
Forest-Steppe of Ukraine
frost resistance
damage
freezing
tissues
sprouts
How to Cite
Abstract
The purpose – to define potential frost resistance shoots and generative buds of members of Persica Mill. in the conditions of simulated low-temperature stress and actual (field) winter hardiness due selection and its expansion on northern regions of growth.
Material and methods. Objects of research – species P. davidiana Carr. and P. vulgaris Mill. (is presented cultivars: Dniprovsky – F2 selected from Druzba (selected from chinese origin seeds), Antoсianovy – Polesky × Pekinsky, Poleski – Avgustovsky ×Mao-tha-or and Suputnik – interspecific hybrids Persica davidiana × Mao-tha-or) from col lection of M.M. Gryshko National Botanical Garden of the NAS of Ukraine. Frost resistanse experiments were performed in laboratories of physiology of Institute gardening of UAAS in the “Frigera” refrigerator. Field winter hardiness was estimated visually to a 8-ball scale of S.Ya. Sokolovа.
Results. During frost resistanse experiments of sprouts it was established that for temperatures –30 °C are most of all damaged tissue in apical part of sprouts. In P. vulgaris the damage rate made 70.8–92.6 % in P. davidiana – 77.0 %. Vulnerable part of sprouts on frost resistense experiments option through a buds, in comparison with interstice tissue. The most vulnerable bodies of sprouts – buds damage of which made (90–96 %). The field assessment of winter hardiness plants of both species represents, on average for years of supervision – 2.25 ball.
Conclusions. The genera Persica are rather frost-resistant. Least damage rate is defined at P. davidiana (46.3 %), and among representatives of P. vulgaris the cultivars Antozianovy (55.3 %) and the Suputnik (59.2 %). They are capable to bear the temperature even below the set norm though fruit educations perish already at –30 °С. Use in selection of a type of P. davidiana, cultivars Antozianovy and the Suputnik will allow to create more adapted representatives to growth conditions in the Forest-Steppe of Ukraine.
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