Molecular systematics of caryopteris (Lamiaceae) and its allies with reference to the molecular phylogeny of subfamily ajugoideae

Chun Lei Xiang, Fei Zhao, Philip D. Cantino, Bryan T. Drew, Bo Li, En De Liu, Douglas E. Soltis, Pamela S. Soltis, Hua Peng

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Ajugoideae, the third-largest subfamily of Lamiaceae with 23 genera and about 760 species, is distributed worldwide, but is primarily found in tropical regions. During the past two decades, substantial progress has been made towards discerning phylogenetic relationships and generic boundaries in Ajugoideae, but major questions still remain. This phylogenetic study was conducted using 422 DNA sequences from seven DNA regions (nrITS, ETS, and matK, rbcL, rps16, trnL-trnF, trnH-psbA) representing 50 species from 22 of 23 genera in Ajugoideae, to reconstruct the backbone phylogeny of the subfamily, with emphasis on phylogenetic relationships among Caryopteris, Schnabelia and their closest allies. Key results: (1) Ajugoideae is monophyletic and can be divided into four main clades. (2) Discretitheca and Glossocarya, which have not been included in any previous molecular analysis, are members of Ajugoideae and closely related to Karomia and Rotheca. (3) Expanded Schnabelia is monophyletic, sister to Rubiteucris, and consists of two morphologically distinct clades, recognized here as sect. Cylindricaulis and sect. Schnabelia. (4) Traditionally defined Caryopteris is confirmed to be polyphyletic, with several segregate genera. (5) Recircumscribed Caryopteris was found to be monophyletic, but intrageneric relationships were not fully resolved. Synapomorphies of Caryopteris include boat-shaped nutlets that are winged along the edge, fimbriate anterior corolla lobes, and suprareticulate pollen sculpturing. Caryopteris forrestii var. minor was elevated to species rank based on molecular and morphological evidence.

Original languageEnglish (US)
Pages (from-to)376-394
Number of pages19
JournalTaxon
Volume67
Issue number2
DOIs
StatePublished - May 2018

Fingerprint

Caryopteris
molecular systematics
Lamiaceae
phylogeny
phylogenetics
DNA
molecular analysis
tropical region
pollen
boats
corolla
tropics
nucleotide sequences

Keywords

  • Discretitheca
  • Glossocarya
  • Rubiteucris
  • Schnabelia
  • Teucrium

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science

Cite this

Molecular systematics of caryopteris (Lamiaceae) and its allies with reference to the molecular phylogeny of subfamily ajugoideae. / Xiang, Chun Lei; Zhao, Fei; Cantino, Philip D.; Drew, Bryan T.; Li, Bo; Liu, En De; Soltis, Douglas E.; Soltis, Pamela S.; Peng, Hua.

In: Taxon, Vol. 67, No. 2, 05.2018, p. 376-394.

Research output: Contribution to journalArticle

Xiang, CL, Zhao, F, Cantino, PD, Drew, BT, Li, B, Liu, ED, Soltis, DE, Soltis, PS & Peng, H 2018, 'Molecular systematics of caryopteris (Lamiaceae) and its allies with reference to the molecular phylogeny of subfamily ajugoideae', Taxon, vol. 67, no. 2, pp. 376-394. https://doi.org/10.12705/672.7
Xiang, Chun Lei ; Zhao, Fei ; Cantino, Philip D. ; Drew, Bryan T. ; Li, Bo ; Liu, En De ; Soltis, Douglas E. ; Soltis, Pamela S. ; Peng, Hua. / Molecular systematics of caryopteris (Lamiaceae) and its allies with reference to the molecular phylogeny of subfamily ajugoideae. In: Taxon. 2018 ; Vol. 67, No. 2. pp. 376-394.
@article{132659ba2e6744e79853e2e3390af933,
title = "Molecular systematics of caryopteris (Lamiaceae) and its allies with reference to the molecular phylogeny of subfamily ajugoideae",
abstract = "Ajugoideae, the third-largest subfamily of Lamiaceae with 23 genera and about 760 species, is distributed worldwide, but is primarily found in tropical regions. During the past two decades, substantial progress has been made towards discerning phylogenetic relationships and generic boundaries in Ajugoideae, but major questions still remain. This phylogenetic study was conducted using 422 DNA sequences from seven DNA regions (nrITS, ETS, and matK, rbcL, rps16, trnL-trnF, trnH-psbA) representing 50 species from 22 of 23 genera in Ajugoideae, to reconstruct the backbone phylogeny of the subfamily, with emphasis on phylogenetic relationships among Caryopteris, Schnabelia and their closest allies. Key results: (1) Ajugoideae is monophyletic and can be divided into four main clades. (2) Discretitheca and Glossocarya, which have not been included in any previous molecular analysis, are members of Ajugoideae and closely related to Karomia and Rotheca. (3) Expanded Schnabelia is monophyletic, sister to Rubiteucris, and consists of two morphologically distinct clades, recognized here as sect. Cylindricaulis and sect. Schnabelia. (4) Traditionally defined Caryopteris is confirmed to be polyphyletic, with several segregate genera. (5) Recircumscribed Caryopteris was found to be monophyletic, but intrageneric relationships were not fully resolved. Synapomorphies of Caryopteris include boat-shaped nutlets that are winged along the edge, fimbriate anterior corolla lobes, and suprareticulate pollen sculpturing. Caryopteris forrestii var. minor was elevated to species rank based on molecular and morphological evidence.",
keywords = "Discretitheca, Glossocarya, Rubiteucris, Schnabelia, Teucrium",
author = "Xiang, {Chun Lei} and Fei Zhao and Cantino, {Philip D.} and Drew, {Bryan T.} and Bo Li and Liu, {En De} and Soltis, {Douglas E.} and Soltis, {Pamela S.} and Hua Peng",
year = "2018",
month = "5",
doi = "10.12705/672.7",
language = "English (US)",
volume = "67",
pages = "376--394",
journal = "Taxon",
issn = "0040-0262",
publisher = "International Association for Plant Taxonomy",
number = "2",

}

TY - JOUR

T1 - Molecular systematics of caryopteris (Lamiaceae) and its allies with reference to the molecular phylogeny of subfamily ajugoideae

AU - Xiang, Chun Lei

AU - Zhao, Fei

AU - Cantino, Philip D.

AU - Drew, Bryan T.

AU - Li, Bo

AU - Liu, En De

AU - Soltis, Douglas E.

AU - Soltis, Pamela S.

AU - Peng, Hua

PY - 2018/5

Y1 - 2018/5

N2 - Ajugoideae, the third-largest subfamily of Lamiaceae with 23 genera and about 760 species, is distributed worldwide, but is primarily found in tropical regions. During the past two decades, substantial progress has been made towards discerning phylogenetic relationships and generic boundaries in Ajugoideae, but major questions still remain. This phylogenetic study was conducted using 422 DNA sequences from seven DNA regions (nrITS, ETS, and matK, rbcL, rps16, trnL-trnF, trnH-psbA) representing 50 species from 22 of 23 genera in Ajugoideae, to reconstruct the backbone phylogeny of the subfamily, with emphasis on phylogenetic relationships among Caryopteris, Schnabelia and their closest allies. Key results: (1) Ajugoideae is monophyletic and can be divided into four main clades. (2) Discretitheca and Glossocarya, which have not been included in any previous molecular analysis, are members of Ajugoideae and closely related to Karomia and Rotheca. (3) Expanded Schnabelia is monophyletic, sister to Rubiteucris, and consists of two morphologically distinct clades, recognized here as sect. Cylindricaulis and sect. Schnabelia. (4) Traditionally defined Caryopteris is confirmed to be polyphyletic, with several segregate genera. (5) Recircumscribed Caryopteris was found to be monophyletic, but intrageneric relationships were not fully resolved. Synapomorphies of Caryopteris include boat-shaped nutlets that are winged along the edge, fimbriate anterior corolla lobes, and suprareticulate pollen sculpturing. Caryopteris forrestii var. minor was elevated to species rank based on molecular and morphological evidence.

AB - Ajugoideae, the third-largest subfamily of Lamiaceae with 23 genera and about 760 species, is distributed worldwide, but is primarily found in tropical regions. During the past two decades, substantial progress has been made towards discerning phylogenetic relationships and generic boundaries in Ajugoideae, but major questions still remain. This phylogenetic study was conducted using 422 DNA sequences from seven DNA regions (nrITS, ETS, and matK, rbcL, rps16, trnL-trnF, trnH-psbA) representing 50 species from 22 of 23 genera in Ajugoideae, to reconstruct the backbone phylogeny of the subfamily, with emphasis on phylogenetic relationships among Caryopteris, Schnabelia and their closest allies. Key results: (1) Ajugoideae is monophyletic and can be divided into four main clades. (2) Discretitheca and Glossocarya, which have not been included in any previous molecular analysis, are members of Ajugoideae and closely related to Karomia and Rotheca. (3) Expanded Schnabelia is monophyletic, sister to Rubiteucris, and consists of two morphologically distinct clades, recognized here as sect. Cylindricaulis and sect. Schnabelia. (4) Traditionally defined Caryopteris is confirmed to be polyphyletic, with several segregate genera. (5) Recircumscribed Caryopteris was found to be monophyletic, but intrageneric relationships were not fully resolved. Synapomorphies of Caryopteris include boat-shaped nutlets that are winged along the edge, fimbriate anterior corolla lobes, and suprareticulate pollen sculpturing. Caryopteris forrestii var. minor was elevated to species rank based on molecular and morphological evidence.

KW - Discretitheca

KW - Glossocarya

KW - Rubiteucris

KW - Schnabelia

KW - Teucrium

UR - http://www.scopus.com/inward/record.url?scp=85046812913&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046812913&partnerID=8YFLogxK

U2 - 10.12705/672.7

DO - 10.12705/672.7

M3 - Article

AN - SCOPUS:85046812913

VL - 67

SP - 376

EP - 394

JO - Taxon

JF - Taxon

SN - 0040-0262

IS - 2

ER -