Palynological Studies on Certain Members of the Malvaceae Family in Rivers State, Nigeria

J.E. Udofia¹ , B.O. Green² , M.G. Ajuru³

Section:Research Paper, Product Type: Journal-Paper
Vol.7 , Issue.4 , pp.63-66, Aug-2020

Online published on Aug 31, 2020

Copyright © J.E. Udofia, B.O. Green, M.G. Ajuru . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Palynological study was undertaken in five species Hibiscus rosa- sinensis L., Abelmoschus esculentus (L) Moench, Abelmoschus caillei (A.Chev.) Stevels, Sida acuta Burm. F. and Sida rhombifolia L. belonging to three genera of the family Malvaceae. The family Malvaceae, commonly known as the hibiscus, or mallow contain about 85 genera and 1500 species of herbaceous, shrubby, and tree plants. Representatives of this family can be found in all except the coldest parts of the world but are most abundant in the tropics. The aim was to establish some useful diagnostic pollen morphological features that may be employed in combination with other characters as inter- specific or generic tools for identification. Pollen samples were collected manually from mature closed anthers. Mature anthers were teased out in water in a petri dish for 5 minutes. Fixation of the pollen grain in 70% alcohol was undertaken, followed by decantation and rinsing to wash off the alcohol. The samples were placed on clean microscope slides. Another slide was used to tease out the content of the anther after which it was mounted in glcerol. The results revealed oblate to spheriodal pollen shape and pantoporate pollen class in all the studied species. Pollen diameter ranged from 139.01?m ? 359.10?m. The largest pollen diameter was recorded in A. esculentus (359.10?m). All the species possessed spinous pollen and the longest spine was observed in A. esculentus (359.10?m) while spine index was highest in A. caillei (3.65?m) and lowest in S. rhombifolia (1.62?m). The information provided in this study may be useful in delimiting the family alongside other taxonomic markers and also in the preparation of the pollen flora of Nigeria

Key-Words / Index Term :
Malvaceae, pollen morphology, Nigeria, Spine index, Pollen diameter, Hibiscus, Abelmoschus, Sida

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