Results 211 to 220 of about 19,829 (258)

Phylogeny of Valerianaceae based on matK and ITS markers, with reference to matK individual polymorphism [PDF]

open access: yesAnnals of Botany, 2004
The monophyly of Valerianaceae and the precise delimitation of the family are not totally resolved. Our knowledge on the phylogeny of the group is only partial: on a morphological basis, some contradicting taxonomic proposals have been published, which demonstrates the difficulties in establishing a natural classification of the family and especially ...
Oriane Hidalgo   +2 more
exaly   +4 more sources

The matK gene: sequence variation and application in plant systematics [PDF]

open access: yesAmerican Journal of Botany, 1997
Although the matK gene has been used in addressing systematic questions in four families, its potential application to plant systematics above the family level has not been investigated. This paper examines the rates, patterns, and types of nucleotide substitutions in the gene and addresses its utility in constructing phylogenies above the family level.
Khidir W Hilu
exaly   +2 more sources
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Molecular evolution and positive Darwinian selection of the chloroplast maturase matK

Journal of Plant Research, 2009
It is not clear whether matK evolves under Darwinian selection. In this study, 70 plant groups, representing 2,279 species at various evolutionary levels, were used to illustrate the molecular adaptation and evolutionary dynamics of gene divergence in matKs. Selective influences were investigated using standard dN/dS ratio methods.
Da-Cheng Hao
exaly   +3 more sources

Expression of matK: functional and evolutionary implications

American Journal of Botany, 2007
Strong phylogenetic signal from matK has rendered it an invaluable gene in plant systematic and evolutionary studies at various evolutionary depths. Further, matK is proposed as the only chloroplast‐encoded group II intron maturase, thus implicating MATK in chloroplast posttranscriptional processing.
Michelle M, Barthet, Khidir W, Hilu
openaire   +2 more sources

Splicing and intron-internal RNA editing of trnK-matK transcripts in barley plastids: support for MatK as an essential splice factor

Journal of Molecular Biology, 1997
Group II introns frequently require assistance by specific factors, maturases, for folding and effective splicing in vivo. The only putative maturase of higher plant chloroplasts is encoded by matK, located in the intron of trnK. We show that in barley matK transcripts are modified at a first codon base by C-to-U RNA editing.
Vogel, Jörg   +3 more
openaire   +3 more sources

Physicochemical evolution and positive selection of the gymnosperm matK proteins

Journal of Genetics, 2010
It is not clear whether matK evolves under Darwinian selection. In this study, the gymnosperm Taxaceae, Cephalotaxaceae and Pinaceae were used to illustrate the physicochemical evolution, molecular adaptation and evolutionary dynamics of gene divergence in matKs. matK sequences were amplified from 27 Taxaceae and 12 Cephalotaxaceae species.
Da Cheng, Hao   +3 more
openaire   +2 more sources

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