INTRA-SPECIFIC POLLEN MORPHOLOGICAL VARIATIONS IN 10 TROPICAL SPECIESGROWING IN SUDAN

The study re-describes pollen grains of 10 tropical species belonging to 10 families. Significant variation in different pollen morphologica l characters was encountered in these species which were previously re ported to have home-morphic pollen grains. Pollen samples from various flowers collected from the same plant were analysed using LM and SEM. In each of the species examined, the diagnostic characteristics of th e multiple pollen forms were presented. The relative percentages of th ese pollen forms were designated as common and less common pollen type s. The study highlights the importance of the use of many pollen sampl es encompassing the whole range of variability as pollen reference mat erial in tropical regions.