The systematic implication of orbicule morphology in Aconogonon (Meisn.) Reicherb. (Polygonaceae)
Min-Su JoP1, Min-Jung Kong1,2, Yun-Chang Jeon1, Suk-Pyo HongC1
1Laboratory of Plant Systematics, Department of Biology, Kyung Hee University, Seoul, Korea; 2Forest Restoration Support Division, Baekdudaegan National Arboretum (BDNA), Bonghwa, Korea
In this study, we observed orbicule morphology of the genus Aconogonon (Meisn.) Reicherb. (17 taxa) using SEM. The orbicules were present, varying in size (0.09―0.83㎛); density ranged from 6.5―16.0 orbicules/㎛2; the shape spherical or irregular with the psilate surface. Each orbicule fused with the inner anther surface and existed independently, but some orbicules aggregated with others. Previous orbicule studies of Aconogonon were insufficient to compare other genera. Since we studied more than half taxa of the genus, Aconogonon, some of the orbicule characteristics could be useful for interpreting the phylogeny of ABK-Clade.
†This study was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Sciences and Technology (No. NRF-2018R1D1A1A09083715).