Taxonomic implications of pollen of some species of the genus Pterospermum Schreb. (Malvaceae s.l. subfam. Dombeyoideae)

Ahmad Juhari, Muhammad Amirul Aiman and Talip, Noraini and Che Amri, Che Nurul Aini and Mohamad Basir, Nur Syazwani and Abdul Rahman, Mohamad Ruzi and Zohari, Ahmad Fitri and Ghazali, Mohd Norfaizal and Abdullah Siam, Nordahlia (2021) Taxonomic implications of pollen of some species of the genus Pterospermum Schreb. (Malvaceae s.l. subfam. Dombeyoideae). Acta Botanica Brasilica, 35 (4). ISSN 0102-3306 E-ISSN 1677-941X

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Abstract

A palynological study of six species of Pterospermum was conducted to investigate variation in pollen micromorphological characteristics. The studied species were P. diversifolium, P. elongatum, P. jackianum, P. javanicum, P. lanceifolium and P. subpeltatum. Pollen was subjected to acetolysis, single-grain techniques and dehydration series, and observed using light and scanning electron microscopy. The results reveal some common characters shared by all the studied species, namely: echinate-granulate exine ornamentation; porate pollen class; and circular amb. Variation was found in the ratio of exine thickness, pollen size, and average spine length, outline, shape, measurements, spine size and the presence of an annulus. These characters proved to be valuable for identifying and differentiating the studied species. This study shows that morphological characteristics of Pterospermum pollen have taxonomic value, especially for the identification and differentiation of species of the subfamily Dombeyoideae and even other Malvaceae s.l.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Dombeyoideae, Malvaceae, Malaysia, palynology, pollen morphology, Pterospermum
Subjects:	Q Science > QK Botany
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Plant Science
Depositing User:	Dr Che Nurul Aini Che Amri
Date Deposited:	11 Feb 2022 16:53
Last Modified:	11 Feb 2022 16:53
URI:	http://irep.iium.edu.my/id/eprint/96723

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