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Palynology, vol.50, no.1, 2026 (SCI-Expanded, Scopus)
The objective of the present research is to characterize the palynological features of Rorippa species native to Türkiye and to determine the correlation between palynological and taxonomic characters of Rorippa taxa. In this context, eight taxa of the genus were investigated (R. amphibia (L.) Besser, R. aurea (Boiss. and Heldr.) Hub.-Mor., R. austriaca (Crantz) Besser, R. edirnensis Yıld., R. islandica ssp. islandica (Oeder) Borbás, R. sylvestris ssp. sylvestris (L.) Besser, R. thracica (Griseb.) Fritsch, and R. x armoracioides (Tausch) Fuss) two of which (R. aurea, R. edirnensis) are endemic to Türkiye. Qualitative (pollen shape, exine sculpture, shape of lumen) and quantitative (polar axis diameter, equatorial axis diameter, thickness of exine and intine, colpus length, colpus width, lumen width, thickness of murus, amb diameter, number of apertures) palynological parameters were analyzed using light microscopy (LM) and scanning electron microscopy (SEM). The results were compared using the PAST program version 2.17c. Among the qualitative characters, shape of pollen varied from oblate spheroidal to prolate. Exine sculpturing and aperture type were uniform and observed as reticulate-tricolpate in all investigated taxa. As for lumen shapes, they were generally irregular and elongated, and in some cases circular, square or hexagonal. Variations were found in some quantitative parameters such as polar axis, colpus length and amb diameter, especially for R. sylvestris ssp. sylvestris. As a result of this study, some pollen characters such as the polar axis and amb diameter were found to be significant for taxonomic use.