Studies on pollen morphology of Ipomoea species (Convolvulaceae)

Pollen morphology of four species of Ipomoea viz., Ipomoea fistulosa (Mart. exChoisy), I. palmata Forssk, I. quamoclit L. and I. triloba L. (Convolvulaceae) from SantGadge Baba Amravati University Campus have been examined by Light and ScanningElectron Microscope (SEM). Pollen grains are usually pantoporate, radially symmetrical,circular in outline, tectum echinate, circular aperture between the spine, suboblate-oblatespheroidal or spheroidal. Among the four species of Ipomoea maximum pollen size(97.39-100.86μm) across was found in I. quamoclit whereas, minimum pollen size (59.17-65.75 μm) across was noted in I. palmata. The maximum spine length (8-14μm) wasrecorded in I. palmata, while it was minimum (4.99-7.33μm) in I. triloba. Consideringpore size all four species of Ipomoea showed close similarities with minor differences.Sculpturing pattern was found to be uniform in all studied species of Ipomoea.