Tag Archives: fruit formations

xxx O. Havryliuk, T. Kondratenko, B. Mazur, O. Tonkha, Y. Andrusyk, V. Kutovenko, R. Yakovlev, V. Kryvoshapka, A. Trokhymchuk and Y. Dmytrenko
Efficiency of productivity potential realization of different-age sites of a trunk of grades of columnar type apple-trees
Abstract |

Efficiency of productivity potential realization of different-age sites of a trunk of grades of columnar type apple-trees

O. Havryliuk¹*, T. Kondratenko², B. Mazur¹, O. Tonkha¹, Y. Andrusyk¹, V. Kutovenko¹, R. Yakovlev¹, V. Kryvoshapka², A. Trokhymchuk² and Y. Dmytrenko¹

¹National University of Life and Environmental Sciences of Ukraine,
Heroiv Oborony Str., 15, UA03041 Kyiv, Ukraine
²Institute of Horticulture of National Academy of Agrarian Sciences of Ukraine, Sadova Str., 23, UA03027 Novosilky, Kyiv Region, Ukraine
*Correspondence: o.havryliuk@nubip.edu.ua

Abstract:

An article provides information about buds organogenesis in plants of columnar apple cultivars in the Forest-Steppe of Ukraine (Kyiv), which allows to establish the features of this process in complex fruit formations of different ages, and their productivity and longevity. We recommend studying of apple trees productivity in the process of its formation by analyzing of rudimentary organs formation and their consistent development into vegetative and generative organs, which are elements of productivity. Studies of organogenesis different-age fruit formations of columnar apple cultivars were conducted in the northern part of the Forest-Steppe of Ukraine during 2016–2020. It was established that separate age sections of columnar apple trees trunk formed different initial productivity potential. In plants of all studied varieties and age groups, the laying of generative buds, the implementation of reproductive elements in V–IX and X–XI stages of organogenesis were more effective in older age areas of the trunk. Complex fruit formations, regardless of the trunk age where they are placed, form a high potential for productivity, which is effectively realized. The dependence of the formation and productivity potential realization on the stages of organogenesis and meteorological factors is established.

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148-160 O. Havryliuk, T. Kondratenko, B. Mazur, V. Kutovenko, B. Mazurenko, O. Voitsekhivska and Y. Dmytrenko
Morphophysiological peculiarities of productivity formation in columnar apple varieties
Abstract |

Morphophysiological peculiarities of productivity formation in columnar apple varieties

O. Havryliuk¹*, T. Kondratenko¹, B. Mazur¹, V. Kutovenko¹, B. Mazurenko¹, O. Voitsekhivska² and Y. Dmytrenko¹

¹National University of Life and Environmental Sciences of Ukraine, 12 А Heroiv Oborony Str., UA03041 Kyiv, Ukraine
²Taras Shevchenko National University of Kyiv, Plant biology department, 60 Volodymyrska Str., UA 03127 Kyiv, Ukraine
*Correspondence: o.havryliuk@nubip.edu.ua

Abstract:

Differentiation of generative buds is one of the most important biological processes of plant transition from vegetative to generative state. This process is key to the problem of creating regular fruit-bearing and early-fruiting plantations. The article provides information on the organogenesis of buds in plants of columnar apple varieties in the Forest-Steppe of Ukraine, which allows establishing the features of this process in complex fruit formations of different ages, and the levels of their productivity and longevity. Research to study the organogenesis of different-age fruit formations of columnar apple varieties was conducted in the northern part of the Forest-Steppe of Ukraine during 2016–2020. The efficiency of realization the plants biological potential of all studied columnar apple varieties at III–IV and V–IX stages of organogenesis was high: the largest number of buds from their total number differentiated into generative on trees varieties ‘Sparta’, ‘President’, ‘Bilosnizhka’, ‘Valuta’ and ‘Tantsivnytsia’ (37–51%), the smallest in ‘Favoryt’ and ‘Bolero’. The biggest number of flowers per one potentially generative bud was formed by plants of ‘Tantsivnytsia’ and ‘Bilosnizhka’ varieties. The lowest level of ovarian loss during the X stage of organogenesis was observed on plants of  ‘Valuta’, ‘President’, and ‘Tantsivnytsia’ varieties (41–49%), and the highest – in ‘Favoryt’ variety (up to 83%). More effective realization of potential productivity at the XI stage of organogenesis occurred in plants of ‘President’, ‘Valuta’ and ‘Tantsivnytsia’ varieties; their trees on one potentially generative bud formed – 0.27–0.38 fruits. The coefficient of determination indicates that the influence of meteorological conditions of the year on the passage of III–IV stages of organogenesis is 46%; V–IX stages – 42%; Stage X – 17%; Stage XI – 24%.

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