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Journal of Plant Sciences

Year: 2007 | Volume: 2 | Issue: 2 | Page No.: 195-201
Research Article

Pollen Morphological Studies on Selected Taxa of Asteraceae

E. Jafari
Research Center of Natural Resources, P.O. Box 71555-617, Shiraz, Iran
Gh. Ghanbarian
Research Center of Natural Resources, P.O. Box 71555-617, Shiraz, Iran
The pollen morphology of 30 species belonging to 24 genera representing 6 tribes of Asteraceae have been investigated with the aid of the light microscope. The results confirm pollen grains of this family exhibit considerable variation in their morphological characteristics as size, aperture type and pattern of exin sculpturing. Pollen grains of all taxa examined are single and can be divided into 2 groups: I-Simple trizonocolporate with echinate or subechinate or verrucate sculpturing pattern on the exin surface which has been founded in following tribes: Cynareae, Anthemideae, Inuleae, Calenduleae and Arctotideae. This group include diffrent types of pollen exin. II- Fenestrate with echinate or echinolophate sculpturing pattern on the exine surface has been founded in Lactuceae.
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