Rosids: Difference between revisions
| Line 16: | Line 16: | ||
==The name== |
==The name== |
||
jake loves you |
|||
The name "rosids" is based upon the name "Rosidae", which had usually been understood to be a subclass. In 1967, [[Armen Takhtajan]] showed that the correct basis for the name "Rosidae" is a description of a [[Taxon|group]] of plants published in 1830 by [[Friedrich Gottlieb Bartling]].<ref name="reveal2008"> {{citation | author = James L. Reveal | date = 2008 onward | contribution = A Checklist of Family and Suprafamilial Names for Extant Vascular Plants | title = Home page of James L. Reveal and C. Rose Broome | url = http://www.plantsystematics.org/reveal | contribution-url = http://www.plantsystematics.org/reveal/pbio/fam/supgennames.html }}</ref> This clade was later renamed "Rosidae" and has been variously [[Circumscription (taxonomy)|delimited]] by different authors. The name "rosids" is informal, and not assumed to have any particular [[taxonomic rank]] like the names authorized by the [[ICBN]]. The rosids are [[monophyletic]] based upon evidence found by [[molecular phylogenetic]] analysis. |
|||
Three different [[Circumscription (taxonomy)|definitions]] of the rosids are currently in use. Some authors include the orders [[Saxifragales]] and [[Vitales]] in the rosids.<ref name="burleigh2009"> {{citation | author = J. Gordon Burleigh, Khidir W. Hilu, and Douglas E. Soltis | year = 2009 | title = Inferring phylogenies with incomplete data sets: a 5-gene, 567-taxon analysis of angiosperms | journal = BMC Evolutionary Biology | volume = 9 | contribution = File 7 | contribution-url = http://www.biomedcentral.com/content/supplementary/1471-2148-9-61-S7.pdf | doi = 10.1186/1471-2148-9-61 | pmc = 2674047 | pages = 61 | pmid = 19292928 }}</ref> Others exclude both of these orders.<ref name="apweb">{{citation | author = Peter F. Stevens | date = 2001 onwards | url = http://www.mobot.org/MOBOT/Research/APweb/welcome.html | title = Angiosperm Phylogeny Website }}</ref> The circumscription used in this article is that of the [[APG II]] classification, which includes Vitales, but excludes Saxifragales. |
|||
==Relationships== |
==Relationships== |
||
Revision as of 18:46, 16 March 2011
| Rosids | |
|---|---|
_in_Hyderabad,_AP_W_IMG_9720.jpg)
| |
| Euphorbia heterophylla | |
| Scientific classification | |
| Kingdom: | |
| (unranked): | |
| (unranked): | |
| (unranked): | Rosids
|
| Orders | |
|
See text | |
The rosids are a large clade of flowering plants, containing about 70,000 species,[1] more than a quarter of all angiosperms.[2] It is divided into 16 to 20 orders, depending upon circumscription and classification. These orders, in turn, together comprise about 140 families.[3] The rosids and the asterids are by far the largest clades in the eudicots.
Fossil rosids are known from the Cretaceous period. Molecular clock estimates indicate that the rosids originated in the Aptian or Albian stages of the Cretaceous, between 125 and 99.6 million years ago.[4][5]
The name
jake loves you
Relationships
hi i'm a rosid and i've had http://www.phylodiversity.net/donoghue/publications/MJD_papers/2007/164_Cantino_Taxon07.pdf | doi = 10.2307/25065865 }}</ref> the others being Berberidopsidales, Caryophyllales, Dilleniales, Santalales, and the asterids. Almost nothing is known about the relationships between these groups.
Classification
The rosids consist of two groups: the order Vitales and the eurosids (true rosids). The eurosids, in turn are divided into seven groups: Fabidae, Geraniales, Myrtales, Crossosomatales, Picramniales,[6] Malvidae,[7] and the unplaced family Apodanthaceae.[8] The Fabidae are often called the fabids, or eurosids I. Likewise, the Malvidae are often called the malvids, or eurosids II.
Orders
hi jake Melcalfe], in Metcalfe, C. R., & Chalk, L., Anatomy of the Dicotyledons, Second Edition. Volume II. Wood Structure and Conclusion of the General Introduction. Clarendon Press, Oxford. ISBN 978-0198545590.</ref> Crossosomatales,[9] Picramniales,[10] and Huerteales.[11]
Unplaced families
The families Apodanthaceae and Huaceae are included in the rosids, but not placed in any of its orders.
Apodanthaceae is an enigmatic family of achlorophyllous parasites. They have been provisionally placed in Cucurbitales by some,[6] but their affinities remain obscure.[8] The chloroplast genes that have been used to infer plant phylogeny do not provide much phylogenetic information for plants that lack chlorophyll, because in this case, these genes are nonfunctional pseudogenes.
The family Huaceae is a member of the COM (Celastrales, Oxalidales, Malpighiales) clade of Fabidae. The question about Huaceae is whether it should be included in one of the COM orders or in an order by itself as a 4th member of the COM clade. Two studies have indicated that it should be placed in Oxalidales,[12][13] while one has indicated that it should not.[1]
Phylogeny
The phylogeny shown below is adapted from Wang and co-authors (2009),[1] with order names from the Angiosperm Phylogeny Website.[6] Branches with less than 50% bootstrap support are collapsed. Other branches have 100% bootstrap support except where shown.
| eurosids | |
The nitrogen-fixing clade contains a high number of actinorhizal plants (which have root nodules containing nitrogen fixing bacteria, helping the plant grow in poor soils). Not all plants in this clade are actinorhizal, however.
References
- ^ a b c Hengchang Wang, Michael J. Moore, Pamela S. Soltis, Charles D. Bell, Samuel F. Brockington, Roolse Alexandre, Charles C. Davis, Maribeth Latvis, Steven R. Manchester, and Douglas E. Soltis (10Mar2009), "Rosid radiation and the rapid rise of angiosperm-dominated forests", Proceedings of the National Academy of Sciences, 106 (10): 3853–3858, doi:10.1073/pnas.0813376106, PMC 2644257, PMID 19223592
{{citation}}: Check date values in:|date=(help)CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link) - ^ Robert W. Scotland and Alexandra H. Wortley (2003), "How many species of seed plants are there?", Taxon, 52 (1): 101–104, doi:10.2307/3647306
- ^ Douglas E. Soltis, Pamela S. Soltis, Peter K. Endress, and Mark W. Chase (2005), Phylogeny and Evolution of the Angiosperms, Sunderland, MA, USA: Sinauer, ISBN 978-0878938179
{{citation}}: CS1 maint: multiple names: authors list (link) - ^ Davies, T.J., Barraclough, T.G., Chase, M.W., Soltis, P.S., Soltis, D.E., and Savolainen, V. (2004), "Darwin's abominable mystery: Insights from a supertree of the angiosperms", Proceedings of the National Academy of Sciences, 101 (7): 1904–1909, doi:10.1073/pnas.0308127100, PMC 357025, PMID 14766971
{{citation}}: CS1 maint: multiple names: authors list (link) - ^ Susana Magallón and Amanda Castillo (2009), "Angiosperm diversification through time", American Journal of Botany, 96 (1): 349–365, doi:10.3732/ajb.0800060
- ^ a b c Cite error: The named reference
apwebwas invoked but never defined (see the help page). - ^ Cite error: The named reference
cantino2007was invoked but never defined (see the help page). - ^ a b Daniel L. Nickrent, "Apodanthaceae", The Parasitic Plant Connection
- ^ Klaus Kubitzki (2007), "Introduction to Crossosomatales", in Klaus Kubitzki (ed.), The Families and Genera of Vascular Plants, vol.IX, Berlin,Heidelberg: Springer-Verlag
- ^ John Hutchinson The Families of Flowering Plants 3rd edition. 1973. Oxford University Press.
- ^ Andreas Worberg, Mac H. Alford, Dietmar Quandt, and Thomas Borsch (2009), "Huerteales sister to Brassicales plus Malvales, and newly circumscribed to include Dipentodon, Gerrardina, Huertea, Perrottetia, and Tapiscia", Taxon, 58 (2): 468–478
{{citation}}: CS1 maint: multiple names: authors list (link) - ^ Douglas E. Soltis, Matthew A. Gitzendanner, and Pamela S. Soltis (2007), "A 567-taxon data set for angiosperms: The challenges posed by Bayesian analyses of large data sets", International Journal of Plant Sciences, 168 (2): 137–157, doi:10.1086/509788
{{citation}}: CS1 maint: multiple names: authors list (link) - ^ Li-Bing Zhang and Mark P. Simmons (2006), "Phylogeny and delimitation of the Celastrales inferred from nuclear and plastid genes", Systematic Botany, 31 (1): 122–137, doi:10.1600/036364406775971778