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Tytuł pozycji:

Hidden in plain sight: Morphological and phylogenetic evidence for Bouteloua arizonica, a species distinct from Bouteloua aristidoides (Poaceae, Chloridoideae)

Tytuł:
Hidden in plain sight: Morphological and phylogenetic evidence for Bouteloua arizonica, a species distinct from Bouteloua aristidoides (Poaceae, Chloridoideae)
Autorzy:
Luis Fernando Cuellar-Garrido
María Elena Siqueiros-Delgado
Temat:
Ancestral state reconstruction
Bouteloua arizonica
Cleistogamy
Morphology
Phylogeny
Sympatry
Biology (General)
QH301-705.5
Botany
QK1-989
Źródło:
Plant Diversity, Vol 43, Iss 2, Pp 125-133 (2021)
Wydawca:
KeAi Communications Co., Ltd., 2021.
Rok publikacji:
2021
Kolekcja:
LCC:Biology (General)
LCC:Botany
Typ dokumentu:
article
Opis pliku:
electronic resource
Język:
English
ISSN:
2468-2659
Relacje:
http://www.sciencedirect.com/science/article/pii/S2468265920300962; https://doaj.org/toc/2468-2659
DOI:
10.1016/j.pld.2020.09.009
Dostęp URL:
https://doaj.org/article/2b6393e3e42a4598bc7a33026e999072  Link otwiera się w nowym oknie
Numer akcesji:
edsdoj.2b6393e3e42a4598bc7a33026e999072
Czasopismo naukowe
Two varieties of Bouteloua aristidoides have been recognized, the widespread var. aristidoides and the more narrowly distributed var. arizonica. The two varieties differ in inflorescence form even more than that seen between many other closely related species of Bouteloua. We therefore asked whether these taxa might be better regarded as distinct species. A total of 93 vouchers were studied by using morphometry (principal components analysis and statistical tests), leaf micromorphology, ancestral state reconstruction, and/or molecular (ITS, trnC-rpoB and trnT-L-F) phylogenetic analyses. Except from the ITS tree, all results supported elevation of B. aristidoides var. arizonica to the rank of species, thus the new combination Bouteloua arizonica (M.E. Jones) L.F. Cuellar & Columbus comb. nov. et stat. nov., is proposed. Chloroplast and combined chloroplast-nuclear molecular trees depicted var. arizonica as monophyletic (even in sympatric populations with var. aristidoides) and reveals phylogenetic structure within var. aristidoides for which the presence of new undescribed varieties of B. aristidoides (different from B. arizonica) is addressed. B. arizonica differs from B. aristidoides in having fewer branches per inflorescence, a bigger branch with more spikelets, and a shorter branch extension. Scanning electron microscopy revealed the presence of papillae on leaves of B. arizonica as a clear synapomorphy. Growing mature plants of B. arizonica from seeds in a greenhouse revealed a strong cleistogamous nature for this species for which gene flow in sympatric populations with B. aristidoides seems unlikely. A taxonomic treatment and distribution map for identification of B. arizonica is provided.

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