Spore characterisation and its taxonomic significance in ferns from Lagos State, Nigeria

doi:10.1080/00173134.2020.1844794

KIB OpenIR

	Spore characterisation and its taxonomic significance in ferns from Lagos State, Nigeria
	Adeonipekun,Peter Adegbenga ; Adebayo,Michael Babatunde ; Oyebanji,Oyetola Olusegun
	2021
发表期刊	GRANA
ISSN	0017-3134
卷号	60 期号:4 页码:271-286
摘要	The gradual disappearance of ferns due to biodiversity loss occasioned by anthropogenic activities and global climate change necessitated the need to document and study palynologically pteridophytes in Lagos State. Their peculiar habitat is fast declining in many urban centres of the world, including Nigeria. Previous studies in Nigeria mainly addressed their distribution, with limited reports on their morphology and systematic significance. Hence, we conducted a field survey and characterised the spore morphology of the encountered ferns in Lagos State, Nigeria, using light microscopy (LM) and scanning electron microscopy (SEM). We recorded nine species belonging to nine genera and five families. The studied species varied in spore size, shape, and ornamentation. Spores' sizes ranged between 30 mu m x 32 mu m in Nephrolepis biserrata and 122 mu m x 127 mu m in Ceratopteris cornuta. Symmetrically, they were bilateral or radial, and ranged in size between very large, large, and medium. Despite marginal differences in polar to equatorial diameter ratios (P/E ratios), the oblate-spheroidal shape class was found to be a synapomorphic character. We observed relationships between the spore shape and the corresponding aperture type. SEM revealed different spore ornamentation types - tuberculate, canaliculate, rugate/rugulate, reticulate, verrucate, tuberculate, and echinate. Our findings propose the potential use of spore P/E ratio and SEM as taxonomic diagnostic tools in Pteridophyte systematics. However, further studies with more representative species are needed to evaluate the factors influencing spore morphology and its taxonomic significance. Overall, this study provides insights into the systematics of ferns in Lagos State and would aid fern identification in palynology and palaeopalynology.
关键词	ferns palynology spore morphology fern taxonomy fern spore morphology palaeopalynology pteridophytes pteridophyte systematics P E ratio Pteridaceae
DOI	10.1080/00173134.2020.1844794
WOS记录号	WOS:000616249700001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73792
专题	中国科学院昆明植物研究所
作者单位	1.Univ Lagos, Dept Bot, Lab Paleobot & Palynol, Lagos, Nigeria 2.Ctr Europeen Rech & Enseignement Geosci Environm, Climate Team, Aix En Provence, France 3.Chinese Acad Sci, Kunming Inst Bot, Kunming, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Adeonipekun,Peter Adegbenga,Adebayo,Michael Babatunde,Oyebanji,Oyetola Olusegun. Spore characterisation and its taxonomic significance in ferns from Lagos State, Nigeria[J]. GRANA,2021,60(4):271-286.
APA	Adeonipekun,Peter Adegbenga,Adebayo,Michael Babatunde,&Oyebanji,Oyetola Olusegun.(2021).Spore characterisation and its taxonomic significance in ferns from Lagos State, Nigeria.GRANA,60(4),271-286.
MLA	Adeonipekun,Peter Adegbenga,et al."Spore characterisation and its taxonomic significance in ferns from Lagos State, Nigeria".GRANA 60.4(2021):271-286.