Epidermal characters in rice (Oryza punctata)


Foliar epidermal studies in Oryza punctata.

by Nwokeocha C. C. (1996)

Nwokeocha Chinyere C.

in Nig. J. Bot. 9: 49-58. –



The foliar epidermal studies were carried out on 21 African accessions of Oryza punctata Kotschy ex Steud. Analysis of both qualitative and quantitative characters of the epidermis revealed the immense value of some foliar epidermal characters to the taxonomy of the rice species, O. punctata.

These characters include: occurrence of short cells and prickle hairs and their distribution, the length of microhairs and their basal, apical cell length ratio. The short cells on the intercostal zones of the epidermides were seen to be abundant and mostly paired in the diploid punctata but sparse and mostly solitary in tetraploid punctata.

Prickle hair was found abundant on the intercostal zone in the tetraploids but sparse in the diploids. On both epidermides, the microhair is generally longer in the diploids than in the tetraploids, the basal cells being about twice the length of the length of the apical cells in diploid but only slightly longer than the apical cells in the tetraploid plants.


Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.

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