Mirbelioids Explained

The Mirbelioids are an informal subdivision of the plant family Fabaceae that includes the former tribes Bossiaeeae and Mirbelieae. They are consistently recovered as a monophyletic clade in molecular phylogenies.[1] [2] [3] [4] [5] [6] [7] The Mirbelioids arose 48.4 ± 1.3 million years ago (in the early Eocene).[8] Members of this clade are mostly ericoid (sclerophyllous) shrubs with yellow and red ('egg and bacon') flowers found in Australia, Tasmania, and Papua-New Guinea.[9] [10] The name of this clade is informal and is not assumed to have any particular taxonomic rank like the names authorized by the ICBN or the ICPN. Members of this clade exhibit unusual embryology compared to other legumes, either enlarged antipodal cells in the embryo sac or the production of multiple embryo sacs.[1] [2] [11] [12] There has been a shift from bee pollination to bird pollination several times in this clade.[13] Mirbelioids produce quinolizidine alkaloids,[14] but unlike most papilionoids, they do not produce isoflavones.[15] Many of the Mirbelioids have pseudoraceme inflorescences.[16]

Genera

The Mirbelioids have been circumscribed to include the following genera:[17]

Giant antipodals group

Multiple embryo-sac group

Basal grade

Callistachys group

Oxylobium grade

Pultenaea group

It has been proposed that many of these genera be subsumed into Pultenaea.[19] [20] [21]

Notes and References

  1. Book: Crisp MD . Advances in Legume Systematics, Part 9 . . Royal Botanic Gardens, Kew . 2000 . 9781842460177 . Herendeen PS . 249–276 . Molecular phylogeny of the genistoid tribes of papilionoid legumes . Bruneau A . Pollard PS.
  2. Book: Crisp MD. Cook LG . Phylogeny and embryo sac evolution in the endemic Australasian papilionoid tribes Mirbelieae and Bossiaeeae . 2003 . Klitgaard BB. Bruneau A . Advances in Legume Systematics, Part 10: Higher Level Systematics . 253–268 . Royal Botanic Gardens, Kew . 9781842460542.
  3. Cardoso D . Pennington RT . de Queiroz LP . Boatwright JS . . Wojciechowski MF . Lavin M . 2013 . Reconstructing the deep-branching relationships of the papilionoid legumes . . 89 . 58–75 . 10.1016/j.sajb.2013.05.001 . free. 10566/3193 . free .
  4. Cardoso D . de Queiroz LP . Pennington RT . de Lima HC . Fonty É . Wojciechowski MF . Lavin M . 2012 . Revisiting the phylogeny of papilionoid legumes: new insights from comprehensively sampled early-branching lineages . . 99 . 12 . 1991–2013 . 10.3732/ajb.1200380 . 23221500 .
  5. McMahon MM. Sanderson MJ . 2006 . Phylogenetic supermatrix analysis of GenBank sequences from 2228 papilionoid legumes . . 99 . 12 . 1991–2013 . 10.1080/10635150600999150 . 17060202 . free .
  6. LPWG [Legume Phylogeny Working Group] . 2013 . Legume phylogeny and classification in the 21st century: progress, prospects and lessons for other species-rich clades . . 62 . 2 . 217–248 . 10.12705/622.8. 10566/3455 .
  7. Doyle JJ. Doyle JL. Ballenger JA. Dickson EE. Kajita T. Ohashi H . 1997 . A phylogeny of the chloroplast gene rbcL in the Leguminosae: taxonomic correlations and insights into the evolution of nodulation . . 84 . 4 . 541–554 . 21708606 . 10.2307/2446030. 2446030. free .
  8. Lavin M. Herendeen PS. Wojciechowski MF . 2005 . Evolutionary rates analysis of Leguminosae implicates a rapid diversification of lineages during the tertiary . . 54 . 4 . 575–94 . 10.1080/10635150590947131 . 16085576 . free .
  9. Web site: Kew entry for Mirbelieae . Crisp MD. Chappill JA. De Kok R. Jobson P . 2013 . www.kew.org . Royal Botanic Gardens, Kew, London, England . 13 January 2016 .
  10. Web site: Ross JH . . 2013 . Kew entry for Bossiaeeae . 13 January 2016 . www.kew.org . Royal Botanic Gardens, Kew, London, England.
  11. Cameron BG. Prakash N . 1990 . Occurrence of giant antipodals in the female gametophytes of Australian Bossiaeeae, Indigofereae, and Mirbelieae (Leguminosae) . . 38 . 4 . 395–401 . 10.1071/BT9900395.
  12. Book: Cameron BG. Prakash N . 1994 . Variations of the megagametophyte in the Papilionoideae . Ferguson IK. Tucker SC . Advances in Legume Systematics, Part 6: Structural Botany . http://www.kewbooks.com/asps/ShowDetails.asp?id=314 . Royal Botanic Gardens, Kew . 97–115 . 978-0947643782 .
  13. Toon A. Cook LG. Crisp MD . 2014 . Evolutionary consequences of shifts to bird-pollination in the Australian pea-flowered legumes (Mirbelieae and Bossiaeeae) . BMC Evolutionary Biology . 14 . 1. 43 . 10.1186/1471-2148-14-43 . 24602227. 4015313 . free .
  14. Kinghorn AD. Balandrin MF. Lin L-J . 1982 . Alkaloid distribution in some species of the papilionaceous tribes Sophoreae, Dalbergieae, Loteae, Brongniartieae, and Bossiaeeae . Phytochemistry . 21 . 9. 2269–2275 . 10.1016/0031-9422(82)85190-X .
  15. Wink M . 2013 . Evolution of secondary metabolites in legumes (Fabaceae) . South African Journal of Botany . 89 . 164–175 . 10.1016/j.sajb.2013.06.006 . free .
  16. Tucker SC . 2005 . Floral ontogeny of Hardenbergia violacea (Fabaceae: Faboideae: Phaseoleae) and taxa of tribes Bossiaeeae and Mirbelieae, with emphasis on presence of pseudoraceme inflorescences . . 19 . 3 . 193–210 . 10.1071/SB05004 .
  17. Web site: Mirbelioid s. l. . Legumes of the World . . January 13, 2017.
  18. Thompson IR . 2011 . A revision of Muelleranthus, Ptychosema, and Aenictophyton (Fabaceae: Bossiaeeae) . Muelleria . 29 . 2 . 173–189 . 10.5962/p.292522 . 251007396 . 2017-01-18 . 2021-01-20 . https://web.archive.org/web/20210120174026/https://www.rbg.vic.gov.au/documents/Muelleria_29(2),_pp173-189_-_Thompson.pdf . dead .
  19. Bickford SA. Laffan SW. de Kok RPJ. Orthia LA . 2004 . Spatial analysis of taxonomic and genetic patterns and their potential for understanding evolutionary histories . Journal of Biogeography . 31 . 11 . 1715–173 . 10.1111/j.1365-2699.2004.01127.x. 84466412 .
  20. Orthia LA. Cook LG. Crisp MD . 2005 . Generic delimitation and phylogenetic uncertainty: An example from a group that has undergone an explosive radiation . . 18 . 1 . 41–47 . 10.1071/SB04016. 56509374 .
  21. Orthia LA. Cook LG. Crisp MD. deKok RPJ . 2005 . Bush peas: A rapid radiation with no support for monophyly of Pultenaea (Fabaceae: Mirbelieae) . . 18 . 2 . 133–147 . 10.1071/SB04028.

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