Molecular phylogenies disprove a hypothesized C4 reversion in Eragrostis walteri (Poaceae)

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Serval ID
serval:BIB_D21B6230D223
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Molecular phylogenies disprove a hypothesized C4 reversion in Eragrostis walteri (Poaceae)
Journal
Annals of Botany
Author(s)
Ingram A.L., Christin P.A., Osborne C.P.
ISSN
1095-8290 (Electronic)
ISSN-L
0305-7364
Publication state
Published
Issued date
2010
Volume
107
Number
2
Pages
321-325
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
Publication Status: ppublish
Abstract
BACKGROUND AND AIMS: The main assemblage of the grass subfamily Chloridoideae is the largest known clade of C(4) plant species, with the notable exception of Eragrostis walteri Pilg., whose leaf anatomy has been described as typical of C(3) plants. Eragrostis walteri is therefore classically hypothesized to represent an exceptional example of evolutionary reversion from C(4) to C(3) photosynthesis. Here this hypothesis is tested by verifying the photosynthetic type of E. walteri and its classification.
METHODS: Carbon isotope analyses were used to determine the photosynthetic pathway of several E. walteri accessions, and phylogenetic analyses of plastid rbcL and ndhF and nuclear internal transcribed spacer DNA sequences were used to establish the phylogenetic position of the species.
RESULTS: Carbon isotope analyses confirmed that E. walteri is a C(3) plant. However, phylogenetic analyses demonstrate that this species has been misclassified, showing that E. walteri is positioned outside Chloridoideae in Arundinoideae, a subfamily comprised entirely of C(3) species.
CONCLUSIONS: The long-standing hypothesis of C(4) to C(3) reversion in E. walteri is rejected, and the classification of this species needs to be re-evaluated.
Keywords
Carbon Isotopes/metabolism, DNA, Plant/genetics, Eragrostis/classification, Eragrostis/genetics, Eragrostis/metabolism, NADH Dehydrogenase/genetics, Plant Proteins/genetics, Ribulose-Bisphosphate Carboxylase/genetics
Pubmed
Web of science
Open Access
Yes
Create date
13/07/2018 9:00
Last modification date
25/09/2019 6:10
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