Effects of tetraploidy on olive floral and fruit biology

Maria Germana', Hava F. Rapoport, Inmaculada Moreno-Alías, Silvia Caporali, Sofiene B.M. Hammami, Adolfo Rosati

Risultato della ricerca: Articlepeer review

6 Citazioni (Scopus)

Abstract

Floral biology and fruit development were studied in Leccino Compact (LC), a polyploid olive mutant of cultivar Leccino (L). This mutant, considered a mixoploid with both diploid and tetraploid cells, has thicker leaves and fruit size similar to the diploid cultivar. So far, no information is available on its floralbiology. In this study,the ploidy level ofthe LC fruit epicarp, analyzed by flow cytometry, was determinedto be tetraploid. Pollen size distribution confirmed that most flowers were tetraploid. Morphological andhistological measurements of various floral structures and fruits were carried out on the two genotypes,and LC showed larger floral structures (i.e. rachis, flower and ovary) and slightly higher pistil abortionrates. The total number of flowers per inflorescence was not significantly different between L and LC.The large difference (about 2 fold) in ovary cross sectional area between LC and L ovaries was mainlydue to increased cell size. LC had slightly larger fruit cross-sectional area (but not greater fruit volume,since LC fruits were less elongated), with much larger cells. Therefore tetraploidy resulted in larger floralstructures, as normally occurs in tetraploid plants, but had little effect on fruit size, despite much larger cell size.
Lingua originaleEnglish
pagine (da-a)198-203
Numero di pagine6
RivistaScientia Horticulturae
Volume179
Stato di pubblicazionePublished - 2014

All Science Journal Classification (ASJC) codes

  • Horticulture

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