Skip to main content

Flower morphology and phylogenetic analysis of some Dioscorea species of the section Stenophora (Dioscoreaceae)

Abstract

The section Stenophora is the most basal clade in the phylogeny of the genus Dioscorea. Most of the species in the section have not been morphologically and embryologically investigated and phylogenetic relationships among species of this section are not very clear. Embryological features, such as the structure of anthers, pollen, ovules, embryo sacs etc., less undergo phenotypic variability and can be used as important characters for systematics and phylogeny. Comparative morphological and embryological analyses of the reproductive structures in 5 Dioscorea species of the section Stenophora (D. balcanica, D. caucasica, D. deltoidea, D. nipponica, D. villosa) are presented. Four characters, which may be significant for systematics of this section as well as the whole genus Dioscorea, were designated: (1) heteromorphism of the stamens in the male flower; (2) the structure of the stigma; (3) the structure of the ovule; (4) the type of female gametophyte development. It was shown that D. balcanica, D. caucasica, D. deltoidea are characterized by similar morphological features and differ from D. nipponica and D. villosa. Analysis of haplotype networks showed that the section Stenophora consists of genetically close species, that was confirmed by the phylogenetic tree of this section. The morphological similarity of D. balcanica, D. caucasica and D. deltoidea is consistent with their location on the phylogenetic tree. However, detailed morphological, embryological and molecular phylogenetic studies of a larger number of species are needed for more accurate interpretation of the Stenophora phylogenetic system.

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7

References

Download references

Acknowledgements

This study was carried out within the framework of the state assignments No. AAAA-A18-118051590112-8 and AAAA-A18-118040290161-3 to Komarov Botanical Institute of the Russian Academy of Sciences (Saint Petersburg). The authors thank I.V. Tatanov, Scientific Researcher of Herbarium Department of the Komarov Botanical Institute for his advices on the Dioscorea taxonomy. The research was done using equipment of The Core Facilities Center «Cell and Molecular Technologies in Plant Science» at the Komarov Botanical Institute RAS (St. Petersburg, Russia).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Galina Vinogradova.

Ethics declarations

Conflict of interest

The authors declare that they have no conflict of interest.

Additional information

Handling editor: Mike Thiv.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Electronic supplementary material

Information on Electronic Supplementary Material

Information on Electronic Supplementary Material

Online Resource 1. GenBank accession numbers of specimens used in the study.

Online Resource 2. The alignment of the trnL refion of the cpDNA.

Online Resource 3. Comparison of matK and trnL networks of the section Stenophora.

Rights and permissions

Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and Permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Vinogradova, G., Torshilova, A. & Machs, E. Flower morphology and phylogenetic analysis of some Dioscorea species of the section Stenophora (Dioscoreaceae). Plant Syst Evol 308, 42 (2022). https://doi.org/10.1007/s00606-022-01834-y

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s00606-022-01834-y

Keywords