Cichorioideae

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Cichorioideae
Cichorium intybus-alvesgaspar1.jpg
Cichorium intybus
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Cichorioideae
Tribes

see text

Cichorioideae is a subfamily of the family Asteraceae of flowering plants. Familiar members of Cichorioideae include lettuce, dandelions and Gazanias. The subfamily comprises about 240 genera and about 2900 species. It is heterogeneous and hard to characterize except with molecular characters.

Taxonomy[edit]

The subfamily as understood in 1998 turned out to be paraphyletic, based on studies of DNA sequences,[1] so a number of tribes were moved to new subfamilies. Names for the new subfamilies were published in 2002.[2] In 2004, 2007, and 2008, molecular phylogenetic studies further clarified relationships within Cichorioideae.[3][4][5]

Major works on Asteraceae were published in 2007 and 2009. These were the only comprehensive treatments of the family since 1994.[6] In the 2007 book, Gundelia and Warionia were segregated from the tribe Cichorieae to form the tribe Gundelieae. Eremothamnus, Hoplophyllum, Heterolepis, and Platycarpha were placed incertae sedis in tribe Arctotideae, while Distephanus, Trichospira, Moquinia, and Pseudostifftia were placed in the tribe Vernonieae.[7] Some of this classification was not supported by phylogenetic studies that came out later.[3][5] For example, the tribe Arctotideae was only weakly supported as monophyletic, but its two subtribes, Arctotidinae and Gorteriinae were strongly supported.

In the 2009 book, Gundelieae was sunk into Cichorieae. The new tribe Platycarpheae was recognized, as well as the tribes Eremothamneae and Moquinieae. Heterolepis was placed in Arctotideae, at least provisoinally. Distephanus was not placed in Moquinieae or in Vernonieae, but is closely related to them.[8] Trichospira was placed in Vernonieae, but its inclusion there is in doubt.

Information on the taxonomy of the Asteraceae can be found at Taxonomy websites such as the Tree of Life Web Project.[9] More can be found at some of the biochemistry websites such as UniProt.[10]

Phylogeny[edit]

The following phylogeny is from Systematics, Evolution and Biogeography of the Compositae, except that the tribe Gundelieae is recognized and the genus Trichospira is not included in Vernonieae.

Cichorioideae


Gundelieae



Cichorieae





Eremothamneae



Arctotidinae



Heterolepis



Gorteriinae



Platycarpheae




Liabeae




Distephanus



Trichospira



Moquinieae



Vernonieae






References[edit]

  1. ^ Randall J. Bayer, Julian R. Starr (April 1998). "Tribal phylogeny of the Asteraceae based on two non-coding chloroplast sequences, the trnL intron and trnL/trnF intergenic spacer". Annals of the Missouri Botanical Garden 85 (2): 242–256. doi:10.2307/2992008. JSTOR 2992008. Retrieved 2008-02-24. 
  2. ^ Jose L. Panero and Vicki A. Funk (2002-12-30). "Toward a phylogenetic subfamilial classification for the Compositae (Asteraceae)" (– Scholar search). Proceedings of the Biological Society of Washington (Biological Society of Washington) 115 (4): 909–922. Retrieved 2007-08-12. [dead link]
  3. ^ a b Vicki A. Funk, Raymund Chan, Stirling C. Keeley (2004). "Insights into the evolution of the tribe Arctoteae (Compositae: subfamily Cichorioideae s.s.) using trnL-F, ndhF, and ITS". Taxon 53 (3): 637–655. doi:10.2307/4135440. JSTOR 4135440. 
  4. ^ Sterling C. Keeley, Zac H. Forsman, and Raymund Chan. 2007. "A phylogeny of the "evil tribe" (Vernonieae: Compositae) reveals Old/New World long distance dispersal: Support from separate and combined congruent datasets (trnL-F, ndhF, ITS)". Molecular Phylogenetics and Evolution 44(1):89-103.
  5. ^ a b Jose L. Panero and Vicki A. Funk. 2008. "The value of sampling anomalous taxa in phylogenetic studies: Major clades of the Asteraceae revealed". Molecular Phylogenetics and Evolution 47(2):757–782.
  6. ^ Kåre Bremer (with the assistance of Arne A. Anderberg, Per Ola Karis, Bertil Nordenstam, Johannes Lundberg, and Olof Ryding). 1994. Asteraceae: cladistics and classification. Timber Press: Oregon, USA. ISBN 978-0-88192-275-2.
  7. ^ Klaus Kubitzki (series editor); Joachim W. Kadereit and Charles Jeffrey (volume editors). The Families and Genera of Vascular Plants volume VIII. Springer-Verlag: Berlin; Heidelberg, Germany. ISBN 978-3-540-31050-1
  8. ^ Vicki A. Funk, Alfonso Susanna, Tod F. Stuessy, and Randall J. Bayer. 2009. Systematics, Evolution and Biogeography of the Compositae. IAPT (International Association for Plant Taxonomy). ISBN 978-3-9501754-3-1 (see External links below).
  9. ^ Cichorioideae At: Tree of Life web project (see External links below).
  10. ^ Cichorioideae At: Uniprot (see External links below).

External links[edit]

The dictionary definition of cichorioideae at Wiktionary Media related to Cichorioideae at Wikimedia Commons Data related to Cichorioideae at Wikispecies