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Differences in ovary size among olive (Olea europaea L.) cultivars are mainly related to cell number, not to cell size

AutorRosati, Adolfo; Caporali, Silvia; Hammami, Sofiene B. M.; Moreno Alías, Inmaculada; Paoletti, Andrea; Rapoport, Hava F.
Fecha de publicación26-ago-2011
EditorElsevier
CitaciónScientia Horticulturae 130(1): 185190 (2011)
ResumenDifferences in mature fruit size among olive cultivars are related to differences in ovary size at bloom, but it is not known whether cell number or size determines the variation in ovary size. In this study we measured cell size and number in equatorial cross-sectional areas of the principal ovary tissues (mesocarp and endocarp) in eight cultivars with very different fruit and ovary size. The results showed that cell number explained most of the differences in ovary size, while cell size was not related to ovary size, except for a weak (R2=0.33) correlation in the endocarp. Since sink strength is thought to be related to cell number, this finding supports the hypothesis that larger ovaries represent stronger sinks. The implications of greater sink strength with bigger ovaries are discussed. Within cultivars, while the cross-sectional areas of mesocarp and endocarp were similar, cell number was higher in the mesocarp but cell size was smaller compared to the endocarp. © 2011 Elsevier B.V.
URIhttp://hdl.handle.net/10261/87384
DOI10.1016/j.scienta.2011.06.035
Identificadoresdoi: 10.1016/j.scienta.2011.06.035
issn: 0304-4238
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