Tags

Type your tag names separated by a space and hit enter

Character evolution and missing (morphological) data across Asteridae.
Am J Bot. 2018 03; 105(3):470-479.AJ

Abstract

PREMISE OF THE STUDY

Our current understanding of flowering plant phylogeny provides an excellent framework for exploring various aspects of character evolution through comparative analyses. However, attempts to synthesize this phylogenetic framework with extensive morphological data sets have been surprisingly rare. Here, we explore character evolution in Asteridae (asterids), a major angiosperm clade, using an extensive morphological data set and a well-resolved phylogeny.

METHODS

We scored 15 phenotypic characters (spanning chemistry, vegetative anatomy, and floral, fruit, and seed features) across 248 species for ancestral state reconstruction using a phylogenetic framework based on 73 plastid genes and the same 248 species.

KEY RESULTS

Iridoid production, unitegmic ovules, and cellular endosperm were all reconstructed as synapomorphic for Asteridae. Sympetaly, long associated with asterids, shows complex patterns of evolution, suggesting it arose several times independently within the clade. Stamens equal in number to the petals is likely a synapomorphy for Gentianidae, a major asterid subclade. Members of Lamianae, a major gentianid subclade, are potentially diagnosed by adnate stamens, unilacunar nodes, and simple perforation plates.

CONCLUSIONS

The analyses presented here provide a greatly improved understanding of character evolution across Asteridae, highlighting multiple characters potentially synapomorphic for major clades. However, several important parts of the asterid tree are poorly known for several key phenotypic features (e.g., degree of petal fusion, integument number, nucellus type, endosperm type, iridoid production). Further morphological, anatomical, developmental, and chemical investigations of these poorly known asterids are critical for a more detailed understanding of early asterid evolution.

Authors+Show Affiliations

Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, 48109, USA.United States Department of Agriculture, National Germplasm Resources Laboratory, Beltsville, MD, 20705-2305, USA.Department of Biology, University of Florida, Gainesville, FL, 32611-8525, USA. Florida Museum of Natural History, University of Florida, Gainesville, FL, 32611-7800, USA.Florida Museum of Natural History, University of Florida, Gainesville, FL, 32611-7800, USA.

Pub Type(s)

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

Language

eng

PubMed ID

29656519

Citation

Stull, Gregory W., et al. "Character Evolution and Missing (morphological) Data Across Asteridae." American Journal of Botany, vol. 105, no. 3, 2018, pp. 470-479.
Stull GW, Schori M, Soltis DE, et al. Character evolution and missing (morphological) data across Asteridae. Am J Bot. 2018;105(3):470-479.
Stull, G. W., Schori, M., Soltis, D. E., & Soltis, P. S. (2018). Character evolution and missing (morphological) data across Asteridae. American Journal of Botany, 105(3), 470-479. https://doi.org/10.1002/ajb2.1050
Stull GW, et al. Character Evolution and Missing (morphological) Data Across Asteridae. Am J Bot. 2018;105(3):470-479. PubMed PMID: 29656519.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Character evolution and missing (morphological) data across Asteridae. AU - Stull,Gregory W, AU - Schori,Melanie, AU - Soltis,Douglas E, AU - Soltis,Pamela S, Y1 - 2018/04/14/ PY - 2017/07/11/received PY - 2017/12/08/accepted PY - 2018/4/16/pubmed PY - 2019/3/1/medline PY - 2018/4/16/entrez KW - Asteridae KW - Campanulidae KW - Gentianidae KW - Lamiidae KW - angiosperm synapomorphies KW - character evolution KW - iridoids KW - morphology SP - 470 EP - 479 JF - American journal of botany JO - Am. J. Bot. VL - 105 IS - 3 N2 - PREMISE OF THE STUDY: Our current understanding of flowering plant phylogeny provides an excellent framework for exploring various aspects of character evolution through comparative analyses. However, attempts to synthesize this phylogenetic framework with extensive morphological data sets have been surprisingly rare. Here, we explore character evolution in Asteridae (asterids), a major angiosperm clade, using an extensive morphological data set and a well-resolved phylogeny. METHODS: We scored 15 phenotypic characters (spanning chemistry, vegetative anatomy, and floral, fruit, and seed features) across 248 species for ancestral state reconstruction using a phylogenetic framework based on 73 plastid genes and the same 248 species. KEY RESULTS: Iridoid production, unitegmic ovules, and cellular endosperm were all reconstructed as synapomorphic for Asteridae. Sympetaly, long associated with asterids, shows complex patterns of evolution, suggesting it arose several times independently within the clade. Stamens equal in number to the petals is likely a synapomorphy for Gentianidae, a major asterid subclade. Members of Lamianae, a major gentianid subclade, are potentially diagnosed by adnate stamens, unilacunar nodes, and simple perforation plates. CONCLUSIONS: The analyses presented here provide a greatly improved understanding of character evolution across Asteridae, highlighting multiple characters potentially synapomorphic for major clades. However, several important parts of the asterid tree are poorly known for several key phenotypic features (e.g., degree of petal fusion, integument number, nucellus type, endosperm type, iridoid production). Further morphological, anatomical, developmental, and chemical investigations of these poorly known asterids are critical for a more detailed understanding of early asterid evolution. SN - 1537-2197 UR - https://www.unboundmedicine.com/medline/citation/29656519/Character_evolution_and_missing__morphological__data_across_Asteridae_ L2 - https://doi.org/10.1002/ajb2.1050 DB - PRIME DP - Unbound Medicine ER -