| Pak. J. Bot., 36(4): 683-700, 2004. | Back to Contents | ||||
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POLLEN FLORA OF PAKISTAN -XLII. BRASSICACEAE ANJUM PERVEEN, M. QAISER AND REHANA KHAN*
Abstract: Pollen morphology of 77 species belonging to 36 genera of the family
Brassicaceae from Pakistan has been examined by light and scanning electron
microscope. Pollen grains are usually radially symmetrical, isopolar
sub-prolate to prolate, or prolate-spheroidal rarely oblate-spheroidal,
tricolpate rarely 4-8 colpate. Sexine thinner or thicker than nexine.
Tectum fine to coarsely reticulate with more or less regular pattern
of muri or reticulate - rugulate. On the basis of tectal surface four
distinct pollen types are recognized viz., Arabis bijuga-type,
Farsetia ramosissima-type, Draba lanceolata -type and
Erysimum melicentae - type. Department of Botany, University of Karachi, Karachi-75270, Pakistan. Federal Urdu University of Science, Arts & Technology, Gulshan-e-Iqbal, University Road, Karachi, Pakistan. |
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