Abstract
Morphoanatomical features can provide useful information for plant taxonomy. In Oxalis sect. Polymorphae (Oxalidaceae) there are currently 12 accepted species, mostly from the Brazilian Atlantic Forest, but the historical recognition of some infraspecific taxa may have resulted in underscored species richness. Integrated analyses of additional types of data are critical to evaluate if some taxa would be better recognized at species level. To evaluate this, we carried out leaf morphoanatomical analysis of O. neuwiedii subsp. neuwiedii and O. neuwiedii subsp. pardoensis and a phylogenetic analysis of nrITS sequences. Both leaf morphoanatomy and phylogenetics lend support to recognize O. neuwiedii subsp. pardoensis at species level. Leaflet venation pattern, epidermal cell outline, hair-covering, vascular conformation of the pulvina, and tissue organization in the midvein were the main morphoanatomical diagnostic features for the recognition of two species instead of a single one. A new rank and the second-step lectotypification are proposed for this taxon, raising to 13 accepted species in O. sect. Polymorphae.
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Acknowledgments
We are grateful to Capes for the master’s fellowship to ER and the doctoral fellowship to TSC, the Brazilian National Council for Scientific and Technological Development (CNPq) for the Research Productivity grant to PF (PQ 306228/2016-5 and 310502/2019-5) and CMS (PQ 301772/2018-5), the Universal grant (420034/2018-8), and the PROTAX grant (441445/2020-9) to PF, FAPESC for the Supplementary grant FAPS PROTAX 22/2020 (2021TR389), and the Graduate Program in Biology of Fungi, Algae, and Plants from Federal University of Santa Catarina (UFSC) by financial and logistic support for this study. We are also in debt to the staff at the Electronic Microscopy Central Laboratory (LCME) and the Multi-user Laboratory in Biological Studies (LAMEB) from UFSC. Lara Lombardi and Jhonathan Radavelli are acknowledged for providing the SEM seed photograph.
Funding
Provided by Brazil’s CAPES (Master’s fellowship to ER) and National Council for Scientific and Technological Development (CNPq) (Grants 306228/2016–5, 310502/2019–1, 420034/2018–8 to PF and 301772/2018–5 to CMS).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by E. Richetti, T.S. Costa, W.S. Cabral and P. Fiaschi. The first draft of the manuscript was written by E. Richetti, M.G. Lusa and P. Fiaschi, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Richetti, E., Costa, T.S., Cabral, W.S. et al. Morphoanatomy and phylogenetics reveals a distinct species of Oxalis sect. Polymorphae (Oxalidaceae) from the Brazilian Atlantic forest. Plant Syst Evol 308, 16 (2022). https://doi.org/10.1007/s00606-022-01807-1
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DOI: https://doi.org/10.1007/s00606-022-01807-1