Pak. J. Bot., 42(6): 3693-3703, 2010.

Back to Contents	Pak. J. Bot., 42(6): 3693-3703, 2010.	FREE FULL TEXT PDF	Back to Contents
			Updated: 23-12-10
	*POLLEN MORPHOLOGY OF SELECTED POLYGONUM* L. SPECIES (POLYGONACEAE) FROM PAKISTAN AND ITS TAXONOMIC SIGNIFICANCE** GHAZALAH YASMIN^1, MIR AJAB KHAN¹ ANDNIGHAT SHAHEEN¹ Abstract:* Pollen morphology of 12 species belonging to the genus Polygonum L., (Polygonaceae) from Pakistan has been investigated by light and scanning electron microscopy. Polygonum L., is an eurypalynous genus and four types of surface ornamentation (granulate, granulate-coarsely reticulate, dimorphic exine and variable pattern of ornamentation in polar and equatorial view) have been observed under scanning electron microscope. The variation in exine ultrastructure makes it possible to distinguish four pollen types (Patulum type, Plebijum type, Cognatum type and Avicularia type). Pollen morphology within the genus proved to be useful for the specific delimitation. ¹Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan ^Corresponding author: ghaza00@hotmail.com*

Back to Contents			Back to Contents
	Your browser does not support inline frames or is currently configured not to display inline frames.