Difference between revisions of "Poales"

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<!--{{Expand Spanish|Poales|topic=sci|date=December 2009}}-->
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#redirect [[:Category:Poales]]
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{{Automatic taxobox
 
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|taxon = Poales
 
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|fossil_range = [[Late Cretaceous]] - Recent (but see text) {{fossilrange|{{period start|Paleogene}}|0|earliest=115}}
 
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|image = Zboże.jpg
 
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|image_caption = [[Common wheat]] (''Triticum aestivum'')
 
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|authority = [[John Kunkel Small|Small]]<ref name=APGIII2009>{{Cite journal |last=Angiosperm Phylogeny Group |year=2009 |title=An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III |journal=Botanical Journal of the Linnean Society |volume=161 |issue=2 |pages=105–121 |url=http://www3.interscience.wiley.com/journal/122630309/abstract | format= PDF |accessdate=2013-07-06 |doi=10.1111/j.1095-8339.2009.00996.x }}</ref>
 
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|subdivision_ranks = Families
 
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|subdivision = See text
 
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}}
 
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The '''Poales''' are a large [[order (biology)|order]] of [[flowering plant]]s in the [[monocotyledon]]s, and includes families of plants such as the [[Poaceae|grasses]], [[bromeliads]], and [[Cyperaceae|sedge]]s.  Sixteen plant families are currently recognized by botanists to be part of Poales.
 
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==Description==
 
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[[File:Billbergia pyramidalis in Hyderabad Nursery W IMG 0425.jpg|thumb|190px|''[[Billbergia pyramidalis]]'' of family [[Bromeliaceae]]]]
 
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The [[flower]]s are typically small, enclosed by bracts, and arranged in [[inflorescence]]s (except in the  genus ''[[Mayaca]]'', with solitary terminal flowers). The flowers of many species are wind pollinated; the seeds usually contain [[starch]].
 
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==Taxonomy==
 
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The [[APG III system]] (2009) accepts the order within a [[monocot]] clade called [[commelinids]], and accepts the following 16 families:<ref name=APGIII2009/>
 
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{{columns-list|colwidth=15em|
 
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*[[Anarthriaceae]]
 
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*[[Bromeliaceae]]
 
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*[[Centrolepidaceae]]
 
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*[[Cyperaceae]]
 
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*[[Ecdeiocoleaceae]]
 
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*[[Eriocaulaceae]]
 
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*[[Flagellariaceae]]
 
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*[[Joinvilleaceae]]
 
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*[[Juncaceae]]
 
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*[[Mayacaceae]]
 
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*[[Poaceae]]
 
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*[[Rapateaceae]]
 
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*[[Restionaceae]]
 
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*[[Thurniaceae]]
 
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*[[Typhaceae]]
 
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*[[Xyridaceae]]
 
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}}
 
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The earlier [[APG system]] (1998) adopted the same placement of the order, although it used the spelling "commelinoids". It did not include the Bromeliaceae and Mayaceae, but had the additional families [[Prionia]]ceae (now included in Thurniaceae), Sparganiaceae (now in Typhaceae), and Hydatellaceae (now transferred out of the monocots; recently discovered to be an 'early-diverging' lineage of flowering plants).
 
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The morphology-based [[Cronquist system]] did not include an order named Poales, assigning these families to the orders [[Bromeliales]], [[Cyperales]], [[Hydatellales]], [[Juncales]], [[Restionales]] and [[Typhales]].
 
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In early [[list of systems of plant taxonomy|systems]], an order including the grass family did not go by the name Poales but by a [[descriptive botanical names|descriptive botanical name]] such as [[Graminales]] in the [[Engler system]] (update of 1964) and in the [[Hutchinson system]] (first edition, first volume, 1926), [[Glumiflorae]] in the [[Wettstein system]] (last revised 1935) or [[Glumaceae]] in the [[Bentham & Hooker system]] (third volume, 1883).
 
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===Evolution and phylogeny===
 
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The earliest fossils attributed to the Poales date to the late [[Cretaceous]] period about {{period start|Paleogene}} million years ago, though some studies (e.g., Bremer, 2002) suggest the origin of the group may extend to nearly 115 million years ago, likely in [[South America]]. The earliest known fossils include [[pollen]] and fruits.
 
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The phylogenetic position of Poales within the commelinids was difficult to resolve, but an analysis using complete [[chloroplast DNA]] found support for Poales as sister group of [[Commelinales]] plus [[Zingiberales]].<ref name="BarrettBaker2015">{{cite journal|last1=Barrett|first1=Craig F.|last2=Baker|first2=William J.|last3=Comer|first3=Jason R.|last4=Conran|first4=John G.|last5=Lahmeyer|first5=Sean C.|last6=Leebens-Mack|first6=James H.|last7=Li|first7=Jeff|last8=Lim|first8=Gwynne S.|last9=Mayfield-Jones|first9=Dustin R.|last10=Perez|first10=Leticia|last11=Medina|first11=Jesus|last12=Pires|first12=J. Chris|last13=Santos|first13=Cristian|last14=Wm. Stevenson|first14=Dennis|last15=Zomlefer|first15=Wendy B.|last16=Davis|first16=Jerrold I.|title=Plastid genomes reveal support for deep phylogenetic relationships and extensive rate variation among palms and other commelinid monocots|journal=New Phytologist|year=2015|pages=855–870|issn=0028-646X|doi=10.1111/nph.13617|url=https://www.researchgate.net/profile/Craig_Barrett2/publication/281644489_Plastid_genomes_reveal_support_for_deep_phylogenetic_relationships_and_extensive_rate_variation_among_palms_and_other_commelinid_monocots/links/55f6ddb308aeafc8abf5065d.pdf|volume=209|pmid=26350789}}</ref> Major lineages within the Poales have been referred to as [[Bromeliad clade|bromeliad]], [[Cyperid clade|cyperid]], [[Xyrid clade|xyrid]], [[Graminid clade|graminid]], and [[restiid clade]]s. A phylogenetic analysis resolved most relationships within the order but found weak support for the monophyly of the cyperid clade.<ref name="Bouchenak-KhelladiMuasya2014">{{cite journal|last1=Bouchenak-Khelladi|first1=Yanis|last2=Muasya|first2=A. Muthama|last3=Linder|first3=H. Peter|title=A revised evolutionary history of Poales: origins and diversification|journal=Botanical Journal of the Linnean Society|volume=175|issue=1|year=2014|pages=4–16|issn=0024-4074|doi=10.1111/boj.12160}} {{open access}}</ref> The relationship between Centrolepidaceae and Restoniaceae within the restiid clade remains unclear; the first may actually be embedded in the latter.<ref name="Bouchenak-KhelladiMuasya2014"/><ref name="BriggsMarchant2014">{{cite journal|last1=Briggs|first1=Barbara G.|last2=Marchant|first2=Adam D.|last3=Perkins|first3=Andrew J.|title=Phylogeny of the restiid clade (Poales) and implications for the classification of Anarthriaceae, Centrolepidaceae and Australian Restionaceae|journal=Taxon|volume=63|issue=1|year=2014|pages=24–46|issn=0040-0262|doi=10.12705/631.1}}</ref>
 
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{{clade|style=font-size:90%;line-height:75%;width:600px;
 
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|1={{clade
 
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  |1=[[Commelinales]]
 
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  |2=[[Zingiberales]]
 
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  }}
 
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|label2='''Poales'''
 
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|2={{clade
 
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  |label1=[[Bromeliad clade]]
 
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  |1={{clade
 
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    |1=[[Bromeliaceae]]
 
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    |2=[[Typhaceae]]
 
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    }}
 
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  |2={{clade
 
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    |1={{clade
 
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      |label1=[[Cyperid clade]]
 
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      |1={{clade
 
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          |1={{clade
 
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            |1=[[Mayacaceae]]
 
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            |2=[[Rapateaceae]]
 
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            }}
 
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          |2={{clade
 
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            |1=[[Thurniaceae]]
 
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            |2={{clade
 
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                |1=[[Cyperaceae]]
 
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                |2=[[Juncaceae]]
 
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                }}
 
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            }}
 
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          }}
 
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      |2={{clade
 
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          |label1=[[Xyrid clade]]
 
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          |1={{clade
 
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            |1=[[Eriocaulaceae]]
 
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            |2=[[Xyridaceae]]
 
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            }}
 
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          |2={{clade
 
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            |label1=[[Graminid clade]]
 
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            |1={{clade
 
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                |1=[[Flagellariaceae]]
 
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                |2={{clade
 
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                  |1=[[Poaceae]]
 
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                  |2={{clade
 
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                      |1=[[Ecdeiocoleaceae]]
 
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                      |2=[[Joinvilleaceae]]
 
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                      }}
 
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                  }}
 
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                }}
 
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            |label2=[[Restiid clade]]
 
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            |2={{clade
 
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                |1=[[Anarthriaceae]]
 
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                |2={{clade
 
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                  |1=[[Centrolepidaceae]]|state1=dashed
 
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                  |2=[[Restionaceae]]|state2=dashed
 
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                  }}
 
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                }}
 
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            }}
 
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          }}
 
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      }}
 
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    }}
 
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  }}
 
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}}
 
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===Diversity===
 
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The four most species-rich families in the order are:
 
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* Poaceae: 12,070 species
 
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* Cyperaceae: 5,500 species
 
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* Bromeliaceae: 3,170 species
 
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* Eriocaulaceae: 1,150 species
 
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<gallery mode=packed caption="Diversity of Poales">
 
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File:Typha_latifolia_Finland.jpg|alt=Typha inflorescence|''[[Typha latifolia]]'', Typhaceae
 
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File:Carex demissa detail.jpeg|alt=Carex demissa inflorescence|''[[Carex demissa]]'', Cyperaceae
 
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File:N Xyrc D9741.JPG|alt=Xyris deplanata flower|''[[Xyris complanata]]'', Xyridaceae
 
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File:Elegia capensis CHCH 2.JPG|alt=Elegia capensis stand|''[[Elegia capensis]]'', Restionaceae
 
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File:Japanese_Foxtail_millet_02.jpg|alt=Unripe millet panicles|[[Foxtail millet]], Poaceae
 
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</gallery>
 
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==Uses==
 
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The Poales are the most economically important order of monocots and possibly the most important order of plants in general. Within the order, by far the most important family economically is the family of grasses (Poaceae, syn. Gramineae), which includes [[barley]], [[maize]], [[millet]], [[rice]], and [[wheat]]. Many Bromeliaceae are used as ornamental plants.
 
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==References==
 
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{{Commons category}}
 
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{{wikispecies}}
 
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{{reflist}}
 
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* {{cite journal | last1 = Bremer | first1 = K | year = 2002 | title = Gondwanan Evolution of the Grass Alliance of Families (Poales) | url = http://www.bioone.org/bioone/?request=get-abstract&issn=0014-3820&volume=056&issue=07&page=1374 | journal = Evolution | volume = 56 | issue = | pages = 1374–1387 | doi=10.1111/j.0014-3820.2002.tb01451.x}}
 
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* Judd, W. S., C. S. Campbell, E. A. Kellogg, P. F. Stevens, M. J. Donoghue (2002). ''Plant Systematics: A Phylogenetic Approach, 2nd edition.'' pp.&nbsp;276–292 (Poales). Sinauer Associates,  Sunderland, Massachusetts. {{ISBN|0-87893-403-0}} .
 
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* {{cite journal | last1 = Linder | first1 = H. Peter | last2 = Rudall | first2 = Paula J. | year = 2005 | title = Evolutionary History of the Poales | url = | journal = Annual Review of Ecology, Evolution, and Systematics | volume = 36 | issue = | pages = 107–124 | doi=10.1146/annurev.ecolsys.36.102403.135635}}
 
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* Small, J. K. (1903). ''Flora of the Southeastern United States'', 48. [[New York City|New York]], [[United States|U.S.A.]]
 
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==External links==
 
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*[http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Tree&id=38820&lvl=3&lin=f&keep=1&srchmode=1&unlock NCBI Taxonomy Browser]
 
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* [http://www.mobot.org/MOBOT/Research/APweb/orders/Poalesweb.htm#Poales APWeb]
 
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{{taxonbar}}
 
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{{monocotyledons}}
 
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[[Category:Poales| ]]
 
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[[Category:Angiosperm orders]]
 
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[[Category:Extant Maastrichtian first appearances]]
 

Latest revision as of 18:57, 8 September 2017

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