Topic
Oenothera
About: Oenothera is a research topic. Over the lifetime, 522 publications have been published within this topic receiving 8890 citations. The topic is also known as: fuchsia.
Papers published on a yearly basis
1 / 3
Papers
TL;DR: Results strongly support a monophyletic Onagraceae, with Ludwigia as the basal lineage and a sister-taxon relationship between Megacorax and Lopezia, and Gongylocarpus is supported as sister to Epilobieae plus the rest of Onagreae, although relationships within the latter clade have limited resolution.
Abstract: Despite intensive morphological and molecular studies of Onagraceae, relationships within the family are not fully understood One drawback of previous analyses is limited sampling within the large tribe Onagreae In addition, the monophyly of two species-rich genera in Onagreae, Camissonia and Oenothera, has never been adequately tested To understand relationships within Onagraceae, test the monophyly of these two genera, and ascertain the affinities of the newly discovered genus Megacorax, we conducted parsimony and maximum likelihood analyses with rbcL and ndhF sequence data for 24 taxa representing all 17 Onagraceae genera and two outgroup Lythraceae Results strongly support a monophyletic Onagraceae, with Ludwigia as the basal lineage and a sister-taxon relationship between Megacorax and Lopezia Gongylocarpus is supported as sister to Epilobieae plus the rest of Onagreae, although relationships within the latter clade have limited resolution Thus, we advocate placement of Gongylocarpus in a monogeneric tribe, Gongylocarpeae Most relationships within Onagreae are weakly resolved, suggesting a rapid diversification of this group in western North America Neither Camissonia nor Oenothera appears to be monophyletic; however, increased taxon sampling is needed to clarify those relationships Morphological characters generally agree with the molecular data, providing further support for relationships
334 citations
TL;DR: Two loci encoding subunit III of the cytochrome oxidase (COX) in Oenothera mitochondria have been identified from a cDNA library of mitochondrial transcripts and the 5′‐termini of both COX I and COX III mRNAs have been mapped in this common sequence confining the promoter region for the Oen othera mitochondrial COx I andCOX III genes to the homologous sequence block.
Abstract: Two loci encoding subunit III of the cytochrome oxidase (COX) in Oenothera mitochondria have been identified from a cDNA library of mitochondrial transcripts. A 657-bp sequence block upstream from the open reading frame is also present in the two copies of the COX subunit I gene and is presumably involved in homologous sequence rearrangement. The proximal points of sequence rearrangements are located 3 bp upstream from the COX I and 1139 bp upstream from the COX III initiation codons. The 5'-termini of both COX I and COX III mRNAs have been mapped in this common sequence confining the promoter region for the Oenothera mitochondrial COX I and COX III genes to the homologous sequence block.
199 citations
170 citations
TL;DR: The cytochrome oxidase subunit II gene has been localized in the mitochondrial genome of Oenothera berteriana and the nucleotide sequence has been determined and the coding sequence contains 777 bp and is not interrupted by an intron.
Abstract: The cytochrome oxidase subunit II gene has been localized in the mitochondrial genome of Oenothera berteriana and the nucleotide sequence has been determined. The coding sequence contains 777 bp and, unlike the corresponding gene in Zea mays, is not interrupted by an intron. No TGA codon is found within the open reading frame. The codon CGG, as in the maize gene, is used in place of tryptophan codons of corresponding genes in other organisms. At position 742 in the Oenothera sequence the TGG of maize is changed into a CGG codon, where Trp is conserved as the amino acid in other organisms. Homologous sequences occur more than once in the mitochondrial genome as several mitochondrial DNA species hybridize with DNA probes of the cytochrome oxidase subunit II gene.
132 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 5 |
| 2024 | 14 |
| 2023 | 9 |
| 2022 | 60 |
| 2021 | 5 |
| 2020 | 7 |