![Sample our Earth Sciences journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5930/TOC-Subject-Sample-2021-Earth-Sciences.jpg"})
Abstract
The variability of ectexine sculpture in the pollen of Jaborosa runcinata (Solanaceae) was studied with light and scanning electron microscopy. Three main ectexine variants are recognized: incomplete reticulate, a combination of incomplete reticulate and gemmate‐granular, and gemmate‐granular. A range of transient conditions were also noted between the two extremes. Apertures vary from a basically triporate‐aspidate arrangement to pollen grains which appear to have a rudimentary colpus. The sculptural variability of the ectexine, and a tendency towards a colpus, in J. runcinata are interesting as intraspecific variation does not appear to be common within Solanaceae.
Acknowledgements
We thank John Skvarla for critical reading of the manuscript, and Viviana Barreda for helping with the LM photographs and the Curators of the Herbarium of La Plata and the Herbarium of Cátedra de Botánica de la Facultad de Química of Uruguay for their assistance. We would also like to thank our reviewers Andrew E. Pozhidaev and Stefan Vinckier who provided valuable comments, which greatly improved the manuscript. This work was supported by Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET).