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Functionality of Embryo Sacs in Pear Cultivars ‘Ingeborg’ and ‘Celina’ as Related to Fruit Set under Nordic Climate

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Innovation Centre at Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia
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Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia
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Fruit Research Institute, Čačak, Kralja Petra I/9, 32000 Čačak, Serbia
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Norwegian Institute of Bioeconomy Research, NIBIO Ullensvang, N-5781 Lofthus, Norway
*
Author to whom correspondence should be addressed.
Plants 2020, 9(12), 1716; https://doi.org/10.3390/plants9121716
Received: 29 October 2020 / Revised: 29 November 2020 / Accepted: 3 December 2020 / Published: 5 December 2020
(This article belongs to the Section Plant Development and Morphogenesis)
Since the European pear (Pyrus communis L.) is a self-incompatible fruit species, synchrony and compatibility between female parts of the mother plant and male gametes from the pollen donor must be fulfilled. Besides pollination and fertilization, normal embryo and zygote development is one of the prerequisites for the satisfactory yields in pears. The main goal of this experiment was to investigate the functionality of embryo sacs and the embryo’s early stages of growth in relation to the fruit set of diploid (‘Celina’) and the triploid (‘Ingeborg’) pear cultivars under specific Norwegian climatic conditions. For this purpose, flowers were collected at the beginning of flowering, and on the third, sixth, ninth, and twelfth days after the beginning of this phenophase for two consecutive years. Ovaries were dehydrated, embedded in paraffin wax, sectioned, stained, and observed under the light microscope. In the analyzed cultivars, results showed different tendencies in embryo sac development and degradation processes, in both experimental years, which is probably due to the genetic background of the examined cultivars. Also, fertilization success and fruit set were higher in the second year of study due to the higher average temperature during the flowering period. Diploid cultivar ‘Celina’ showed much better adaptation to high temperatures in relation to triploid cultivar ‘Ingeborg’. View Full-Text
Keywords: Pyrus communis L.; cultivars; embryo sac; viability; fertilization success; fruit set Pyrus communis L.; cultivars; embryo sac; viability; fertilization success; fruit set
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MDPI and ACS Style

Cerović, R.; Fotirić Akšić, M.; Đorđević, M.; Meland, M. Functionality of Embryo Sacs in Pear Cultivars ‘Ingeborg’ and ‘Celina’ as Related to Fruit Set under Nordic Climate. Plants 2020, 9, 1716. https://doi.org/10.3390/plants9121716

AMA Style

Cerović R, Fotirić Akšić M, Đorđević M, Meland M. Functionality of Embryo Sacs in Pear Cultivars ‘Ingeborg’ and ‘Celina’ as Related to Fruit Set under Nordic Climate. Plants. 2020; 9(12):1716. https://doi.org/10.3390/plants9121716

Chicago/Turabian Style

Cerović, Radosav, Milica Fotirić Akšić, Milena Đorđević, and Mekjell Meland. 2020. "Functionality of Embryo Sacs in Pear Cultivars ‘Ingeborg’ and ‘Celina’ as Related to Fruit Set under Nordic Climate" Plants 9, no. 12: 1716. https://doi.org/10.3390/plants9121716

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