![]() Paolo Rapisarda, in Polyphenols in Plants (Second Edition), 2019 4.7 Pummelo It is a monoembryonic species with a gametophytic self-incompatibility system ( Soost, 1968). maxima produces a high level of several secondary metabolites such as naringin ( Swingle and Reece, 1967) and coumarins and furanocoumarins ( Dugrand-Judek et al., 2015). Leaves are “large or very large, oval or elliptic-oval, with a blunt point at the tip and a broadly rounded base, often subcordate and even slightly overlapping the winged petiole… the petiole is broadly winged, and more or less cordate” ( Swingle and Reece, 1967). Young angular twigs, leaf midribs, and large veins and petioles are often pubescent. Citrus maxima presents additional distinctive characteristics compared with other Citrus species. The weakly adherent pulp vesicles can then be separated. The membranes enclosing the segments are very strong and can easily be peeled. The fruit usually has a thick peel and very large pulp vesicles compared with other Citrus species. maxima has the biggest flowers (with five sepals and petals and 20–25 stamens, with large linear anthers) and produces the biggest fruits in Citrus, which are oblate-spheroid or subpyriform with large, thick, wrinkled seeds. According to the description made by Swingle and Reece (1967), C. A natural hybridization with sweet orange occurring in the Caribbean region produced the grapefruit (see more detail below). It was introduced into the Caribbean during the discovery period of the New World, where it is named shaddock. Citrus maxima is widely distributed and cultivated in Southeastern Asia and the East Indian Archipelago with the English common name of pummelo. ![]()
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