RT Journal Article
T1 Palynotaxonomy of the subtribe Anisopappinae (Athroismeae, Asteraceae) and the genus Duhaldea (Inuleae, Asteraceae) based on their exine ultrastructure
A1 Pereira Coutinho, António
A1 Ortiz Núñez, Santiago
A1 Cordeiro, Daniela
A1 Serrano Pérez, Luis Miguel
A1 Zuzarte, Mónica
K1 Anisopappus
K1 Anisopappinae
K1 Duhaldea
K1 Exine
K1 Mesoapertures
K1 Palynotaxonomy
K1 Ultrastructure
AB The exine ultrastructure of eighteen species of Anisopappus (Anisopappinae, Athroismeae, Asteraceae) and three species of Duhaldea (Inuleae, Asteraceae) was studied using Transmission Electron Microscopy (TEM). Two ultrastructural patterns were identified: Senecioid and Helianthoid. The Senecioid pattern is characteristic of the species included in the basal clades of the phylogenetic tree of Anisopappus, as published in earlier studies. The Helianthoid pattern is restricted to the taxa placed in the derived clades, including the core group of species of Anisopappus where A. chinensis, the type species, is included. The observed ultrastructural differences seem to suggest that a future splitting of Anisopappus into several different genera should not be disregarded and that the Helianthoid pattern represents, within this genus, the derived condition. The ultrastructure of the exine supports the inclusion, suggested by previous authors, of the species Duhaldea stuhlmannii, but not that of Philyrophyllum schinzii, in Anisopappus. In contrast, the three studied species of Duhaldea (D. cappa, D. nervosa, D. revoluta) present an exine with a Senecioid pattern, which is characteristic of the tribe Inuleae, in which they are included. The ectoaperture, mesoaperture, and endoaperture of all studied Anisopappinae and of Duhaldea, respectively intersect the tectum plus columellae, the foot layer and the outer part of the endexine, and the inner part of the endexine. This feature seems to characterize, in a consistent way, the “Heliantheae alliance”, and is also present in all the studied Asteroideae (excl. Anthemideae), Dicomoideae, and Carduoideae.
PB Taylor&Francis
SN 0191-6122
SN 10.1080/01916122.2023.2261997
YR 2023
FD 2023-09-27
LK https://hdl.handle.net/10347/45539
UL https://hdl.handle.net/10347/45539
LA eng
NO Pereira Coutinho, A., Ortiz, S., Cordeiro, D., Serrano, M., & Zuzarte, M. (2024). Palynotaxonomy of the subtribe Anisopappinae (Athroismeae, Asteraceae) and the genus Duhaldea (Inuleae, Asteraceae) based on their exine ultrastructure. Palynology, 48(1). https://doi.org/10.1080/01916122.2023.2261997
NO This is an Accepted Manuscript of an article published by Taylor & Francis in Palynology on 2023, available at: https://doi.org/10.1080/01916122.2023.2261997
NO This work was supported by the Fundação para a Ciência e a Tecnologia [through UID/BIA/04004/ 2020] and by a grant for the consolidation and structuring of competitive research units from the Xunta de Galicia.
DS Minerva
RD 22 abr 2026