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Egypt. J. Exp. Biol. (Bot.). 2011; 7(1): 35-41


FINE STRUCTURES OF SOME BRYOFLORA SPORES FROM SAUDI ARABIA

Gamal MA. Lashin.




Abstract

Spores of some species of different families of Bryophyta from Southwestern Saudi Arabia (Asser region) are studied for the first time by light (LM) and scanning electron microscopy (SEM). These species are: Funaria muhlenbergii Turn. (Funariaceae), Bryum argenteum Hedw., B. capillare Hedw. (Bryaceae), Tortula atrovirens (Sm.) Lendb. (Pottiaceae) and Hypnum vaucheri Lesq. (Hypnaceae). The aperture region consists of a leptoma in all spores. The spore wall includes sclerine (the distinction between exine and perine may be difficult to define) and intine. The results show that the surface ornamentation of the spore's sclerine could be divided into four types: type1, baculates in Funaria, type2, scabrate-verrucate irregular distribution in Tortula, type 3, dense piloid in Bryum and type4, scattered piloid in Hypnum. The surface ornamentation is a regular piloid in Bryum argenteum, while its irregular abnormal piloid in B. capillare. These characters are established and reflecting the species taxonomic relationships. The taxonomy of the genus is discussed on the basis of its spore morphology.

Key words: Bryoflora, Morphology, Spores, Saudi Arabia, LM, SEM






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