Tags

Type your tag names separated by a space and hit enter

Resolving basal lamiid phylogeny and the circumscription of Icacinaceae with a plastome-scale data set.
Am J Bot. 2015 Nov; 102(11):1794-813.AJ

Abstract

PREMISE OF THE STUDY

Major relationships within Lamiidae, an asterid clade with ∼40000 species, have largely eluded resolution despite two decades of intensive study. The phylogenetic positions of Icacinaceae and other early-diverging lamiid clades (Garryales, Metteniusaceae, and Oncothecaceae) have been particularly problematic, hindering classification and impeding our understanding of early lamiid (and euasterid) character evolution.

METHODS

To resolve basal lamiid phylogeny, we sequenced 50 plastid genomes using the Illumina sequencing platform and combined these with available asterid plastome sequence data for more comprehensive phylogenetic analyses.

KEY RESULTS

Our analyses resolved basal lamiid relationships with strong support, including the circumscription and phylogenetic position of the enigmatic Icacinaceae. This greatly improved basal lamiid phylogeny offers insight into character evolution and facilitates an updated classification for this clade, which we present here, including phylogenetic definitions for 10 new or converted clade names. We also offer recommendations for applying this classification to the Angiosperm Phylogeny Group (APG) system, including the recognition of a reduced Icacinaceae, an expanded Metteniusaceae, and two orders new to APG: Icacinales (Icacinaceae + Oncothecaceae) and Metteniusales (Metteniusaceae).

CONCLUSIONS

The lamiids possibly radiated from an ancestry of tropical trees with inconspicuous flowers and large, drupaceous fruits, given that these morphological characters are distributed across a grade of lineages (Icacinaceae, Oncothecaceae, Metteniusaceae) subtending the core lamiid clade (Boraginales, Gentianales, Lamiales, Solanales, Vahlia). Furthermore, the presence of similar morphological features among members of Aquifoliales suggests these characters might be ancestral for the Gentianidae (euasterids) as a whole.

Authors+Show Affiliations

Department of Biology, University of Florida, Gainesville, Florida 32611-8525 USA Florida Museum of Natural History, University of Florida, Gainesville, Florida 32611-7800 USA gwstull@gmail.com.Herbario CICY, Centro de Investigación Científicas de Yucatán A. C., Mérida, Yucatán 97200 Mexico.Department of Biology, University of Florida, Gainesville, Florida 32611-8525 USA Florida Museum of Natural History, University of Florida, Gainesville, Florida 32611-7800 USA.Florida Museum of Natural History, University of Florida, Gainesville, Florida 32611-7800 USA.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

26507112

Citation

Stull, Gregory W., et al. "Resolving Basal Lamiid Phylogeny and the Circumscription of Icacinaceae With a Plastome-scale Data Set." American Journal of Botany, vol. 102, no. 11, 2015, pp. 1794-813.
Stull GW, Duno de Stefano R, Soltis DE, et al. Resolving basal lamiid phylogeny and the circumscription of Icacinaceae with a plastome-scale data set. Am J Bot. 2015;102(11):1794-813.
Stull, G. W., Duno de Stefano, R., Soltis, D. E., & Soltis, P. S. (2015). Resolving basal lamiid phylogeny and the circumscription of Icacinaceae with a plastome-scale data set. American Journal of Botany, 102(11), 1794-813. https://doi.org/10.3732/ajb.1500298
Stull GW, et al. Resolving Basal Lamiid Phylogeny and the Circumscription of Icacinaceae With a Plastome-scale Data Set. Am J Bot. 2015;102(11):1794-813. PubMed PMID: 26507112.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Resolving basal lamiid phylogeny and the circumscription of Icacinaceae with a plastome-scale data set. AU - Stull,Gregory W, AU - Duno de Stefano,Rodrigo, AU - Soltis,Douglas E, AU - Soltis,Pamela S, Y1 - 2015/10/27/ PY - 2015/06/23/received PY - 2015/09/16/accepted PY - 2015/10/29/entrez PY - 2015/10/29/pubmed PY - 2016/8/16/medline KW - Garryales KW - Icacinaceae KW - Lamiidae KW - Metteniusaceae KW - Oncothecaceae KW - phylogenetic nomenclature KW - phylogenomics KW - plastid genome SP - 1794 EP - 813 JF - American journal of botany JO - Am. J. Bot. VL - 102 IS - 11 N2 - PREMISE OF THE STUDY: Major relationships within Lamiidae, an asterid clade with ∼40000 species, have largely eluded resolution despite two decades of intensive study. The phylogenetic positions of Icacinaceae and other early-diverging lamiid clades (Garryales, Metteniusaceae, and Oncothecaceae) have been particularly problematic, hindering classification and impeding our understanding of early lamiid (and euasterid) character evolution. METHODS: To resolve basal lamiid phylogeny, we sequenced 50 plastid genomes using the Illumina sequencing platform and combined these with available asterid plastome sequence data for more comprehensive phylogenetic analyses. KEY RESULTS: Our analyses resolved basal lamiid relationships with strong support, including the circumscription and phylogenetic position of the enigmatic Icacinaceae. This greatly improved basal lamiid phylogeny offers insight into character evolution and facilitates an updated classification for this clade, which we present here, including phylogenetic definitions for 10 new or converted clade names. We also offer recommendations for applying this classification to the Angiosperm Phylogeny Group (APG) system, including the recognition of a reduced Icacinaceae, an expanded Metteniusaceae, and two orders new to APG: Icacinales (Icacinaceae + Oncothecaceae) and Metteniusales (Metteniusaceae). CONCLUSIONS: The lamiids possibly radiated from an ancestry of tropical trees with inconspicuous flowers and large, drupaceous fruits, given that these morphological characters are distributed across a grade of lineages (Icacinaceae, Oncothecaceae, Metteniusaceae) subtending the core lamiid clade (Boraginales, Gentianales, Lamiales, Solanales, Vahlia). Furthermore, the presence of similar morphological features among members of Aquifoliales suggests these characters might be ancestral for the Gentianidae (euasterids) as a whole. SN - 1537-2197 UR - https://www.unboundmedicine.com/medline/citation/26507112/Resolving_basal_lamiid_phylogeny_and_the_circumscription_of_Icacinaceae_with_a_plastome_scale_data_set_ L2 - https://doi.org/10.3732/ajb.1500298 DB - PRIME DP - Unbound Medicine ER -