Molecular Phylogenetics and Taxonomy of Aristolochiaceae

The Aristolochiaceae, a family of over 1,000 species of flowering plants distributed across tropical and temperate regions, has long posed challenges for classification owing to convergent floral morphologies and scant diagnostic characters. Molecular phylogenetics has revolutionised our understanding by providing robust DNA-based frameworks that reveal deep divergences and cryptic lineages. Analyses of chloroplast genomes and nuclear ribosomal markers have clarified relationships among the major genera—Aristolochia, Asarum, Isotrema and others—and have supported the recognition of subgenera and sectional groupings. Complete plastome sequencing has unveiled structural rearrangements, mutational hotspots and variable simple sequence repeats that serve as high-resolution markers for species delimitation. Phylogenetic trees built from concatenated protein-coding genes have resolved long-standing taxonomic ambiguities, such as the segregation of Siphisia and Heterotropa clades, and have highlighted rapid radiations in island and montane floras. This molecular framework underpins revised taxonomic treatments, informs biogeographical reconstructions of palaeotropical dispersal and guides conservation priorities by pinpointing evolutionarily distinct lineages. Moreover, improved species circumscription enhances investigations of the family’s rich repertoire of bioactive compounds, with implications for pharmacognosy and sustainable utilisation. Together, these advances forge a coherent, globally significant taxonomy that integrates morphology, genomics and ecology for one of the world’s most intriguing plant families.

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Molecular Phylogenetics and Taxonomy of Aristolochiaceae publication trend

The graph below shows the total number of articles in molecular phylogenetics and taxonomy of aristolochiaceae across all publications each year (not limited to Nature Index journals).

Technical terms

Chloroplast genome: The complete DNA sequence of the chloroplast, used for phylogenetic inference due to conserved structure and moderate mutation rate.

Large single-copy (LSC) region: A segment of the chloroplast genome present in single copy and containing most genes.

Small single-copy (SSC) region: A smaller single-copy segment of the chloroplast genome flanked by inverted repeats.

Inverted repeats (IR): Two identical sequences in opposite orientation that separate the LSC and SSC regions in the chloroplast genome.

Simple sequence repeats (SSRs): Short, tandemly repeated DNA motifs used as highly variable markers for species and population studies.

Monophyly: A group of organisms that includes an ancestor and all its descendants, indicating a single evolutionary origin.

References

1. Insights into taxonomy and phylogenetic relationships of eleven Aristolochia species based on chloroplast genome. Frontiers in Plant Science (2023).
2. Complete Plastome of Three Korean Asarum (Aristolochiaceae): Confirmation Tripartite Structure within Korean Asarum and Comparative Analyses. Plants (2021).
3. Isotrema putalengense, a new species of Aristolochiaceae from northern Vietnam and two new combinations in Isotrema. PhytoKeys (2022).