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The external pollen morphology of Justicia is diverse and offers a wealth of characters currently used for classifying species. The pollen morphology of 12 species of Justicia and six species from five closely related genera was investigated using a focused ion beam-scanning electron microscope (FIB-SEM). This method allows for three dimensional examination of the internal pollen wall structure. The...
External pollen grain morphology has been widely used in the taxonomy and systematics of flowering plants, especially the Acanthaceae which are noted for pollen diversity. However internal pollen wall features have received far less attention due to the difficulty of examining the wall structure. Advancing technology in the field of microscopy has made it possible, with the use of a focused ion beam–scanning...
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