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Reproductive biology of Olive (Olea europaea L.) DOP Umbria cultivars

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Abstract

Olive trees have a plentiful bloom but a low percentage of normal fruit set. To improve fruit set, numerous investigations have sought to identify the obstacles that prevent full production. In this work, flower development in five DOP Umbria cultivars (Leccino, Frantoio, Moraiolo, Dolce Agogia and San Felice) was studied throughout different developmental phases, from before microsporogenesis and megasporogenesis to post-anthesis, by morphological and cyto-histological observations. Dolce Agogia was the most precocious cultivar, while full flowering was simultaneous in Leccino, Frantoio, Moraiolo and San Felice. Frantoio and Leccino were also good pollen producers, having the highest percentage of pollen viability and germinability. Dolce Agogia can also be considered a good pollen producer in terms of the high quantity of released pollen, but it had the lowest levels of pollen viability and germinability and the highest percentage of aborted flowers and ovaries. Morphological and cyto-histological observations on the number of flowers per inflorescence and the number of aborted flowers and ovaries suggest that fruit set was not influenced by the number of flowers per inflorescence, but rather by the number of inflorescences, which depends on the global fruiting potential of the tree.

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Acknowledgment

The authors thank Prof. Mauro Cresti (Dipartimento di Biologia Ambientale, University of Siena) for the critical review of this manuscript.

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Authors and Affiliations

  1. Department of Plant Biology and Zootechnical and Agroenvironmental Biotechnology, University of Perugia, Borgo XX Giugno 74, 06121, Perugia, Italy

    L. Reale, C. Sgromo, T. Bonofiglio, F. Orlandi, M. Fornaciari, F. Ferranti & B. Romano

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  1. L. Reale
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  2. C. Sgromo
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  3. T. Bonofiglio
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  4. F. Orlandi
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  5. M. Fornaciari
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  6. F. Ferranti
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  7. B. Romano
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Correspondence to L. Reale.

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Communicated by S. Russell

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Reale, L., Sgromo, C., Bonofiglio, T. et al. Reproductive biology of Olive (Olea europaea L.) DOP Umbria cultivars. Sex Plant Reprod 19, 151–161 (2006). https://doi.org/10.1007/s00497-006-0032-6

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  • DOI: https://doi.org/10.1007/s00497-006-0032-6

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