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Stematic Characterization of Six Citrus Species Using Petiole Anatomy

Osuoha VUN, Mbagwu FN, Inyama CN and Ukpai KU

The petiole anatomical characters of six Citrus species showed that C. sinensis, C. limon, C. aurantifolia, C. paradisi and C. maxima petiole have oval shaped vascular bundles while it is kidney-shaped in C. reticulata. The vascular bundle of the node of C. limon is oval to bulbose to spherical while others have boat-shaped vascular bundles. The stellar arrangement is pent arch in C. maxima while others have hexarch. The results on the petiole anatomy of the six Citrus species were used to determine the phylogenetic relationships between the studied species.