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170 results for “Onagraceae”
Oenothera macrocarpa (Onagraceae) - whole plant - in flower - general view
Image of Oenothera macrocarpa (Onagraceae) - whole plant - in flower - general view
Oenothera triloba (Onagraceae) - whole plant - in flower - general view
Image of Oenothera triloba (Onagraceae) - whole plant - in flower - general view
Oenothera triloba (Onagraceae) - whole plant - in flower - general view
Image of Oenothera triloba (Onagraceae) - whole plant - in flower - general view
Gaura filipes (Onagraceae) - fruit - juvenile
Image of Gaura filipes (Onagraceae) - fruit - juvenile
Gaura filipes (Onagraceae) - inflorescence - frontal view of flower
Image of Gaura filipes (Onagraceae) - inflorescence - frontal view of flower
The evolution of multi-gene families and metabolic pathways in the evening primroses (Oenothera: Onagraceae): a comparative transcriptomics approach
<p>The plant genus <em>Oenothera</em> has played an important role in the study of genome evolution and plant defense and reproduction. Here, we built on the 1kp transcriptomic dataset and developed a molecular resource of 63 transcriptomes and present a large-scale comparative study across 29 <em>Oenothera</em> species. We produced 2.3 million transcripts and 25.4 Mb of total length assembly per individual. We used this transcriptome resource to examine genome-wide evolutionary patterns and functional diversification by searching for orthologous genes and performed gene family evolution analysis. We found wide heterogeneity in gene family evolution across the genus, with section <em>Oenothera </em>exhibiting the most pronounced evolutionary changes. Overall, more significant expansions occurred than contractions. We also analyzed the molecular evolution of phenolic metabolism by retrieving proteins annotated for phenolic enzymatic complexes. We identified 1,568 phenolic genes arranged into 83 multigene families that varied widely across the genus. All taxa experienced rapid phenolic evolution involving 33 gene families, which exhibited large expansions, gaining about 2-fold more genes than they lost. Upstream enzymes phenylalanine ammonia-lyase (PAL) and 4-coumaroyl: CoA ligase (4CL) accounted for most of the significant expansions and contractions. Our results suggest that adaptive responses to environmental stress coupled with non-adaptive evolutionary forces have contributed to <em>Oenothera </em>diversification and rapid gene family evolution.</p>
The evolution of multi-gene families and metabolic pathways in the evening primroses (Oenothera: Onagraceae): a comparative transcriptomics approach
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Supporting Data for: Differential gene expression associated with a floral scent polymorphism in the evening primrose Oenothera harringtonii (Onagraceae)
<p><strong>Background:</strong> Plant volatiles play an important role in both plant-pollinator and plant-herbivore interactions. Intraspecific polymorphisms in volatile production are ubiquitous, but studies that explore underlying differential gene expression are rare. Oenothera harringtonii populations are polymorphic in floral emission of the monoterpene (R)-(-)-linalool; some plants emit (R)-(-)-linalool (linalool+ plants) while others do not (linalool- plants). However, the genes associated with differential production of this floral volatile in Oenothera are unknown. We used RNA-Seq to broadly characterize differential gene expression involved in (R)-(-)-linalool biosynthesis. To identify genes that may be associated with the polymorphism for this trait, we used RNA-Seq to compare gene expression in six different Oenothera harringtonii tissues from each of three linalool+ and linalool- plants.</p> <p><strong>Results: </strong>Three clusters of differentially expressed genes were enriched for terpene synthase activity: two were characterized by tissue-specific upregulation and one by upregulation only in plants with flowers that produce (R)-(-)-linalool. A molecular phylogeny of all terpene synthases identified two putative (R)-(-)-linalool synthase transcripts in Oenothera harringtonii, a single allele of which is found exclusively in linalool+ plants.</p> <p><strong>Conclusions:</strong> By using a naturally occurring polymorphism and comparing different tissues, we were able to identify genes putatively involved in the biosynthesis of (R)-(-)-linalool. Expression of these genes in linalool- plants suggests a regulatory polymorphism, rather than a population-specific loss-of-function allele. Additional terpene biosynthesis-related genes that are up-regulated in plants that emit (R)-(-)-linalool may be associated with herbivore defense, suggesting a potential economy of scale between plant reproduction and defense.</p>
Figs. 1–9 in Oenothera pilosellaRaf. (Onagraceae): First Larval Host Record ForDietzella zimmermanni(Gyllenhal) (Coleoptera: Curculionidae: Ceutorhynchinae) andAltica pedipallidaLesage (Coleoptera: Chrysomelidae: Galerucinae: Alticini)
Figs. 1–9. Altica pedipallida: 1) Mature larva; 2) Larval feeding damage and frass (Dietzella zimmermanni larva feeding in upper right); 3) Adult. Dietzella zimmermanni: 4) Larva, lateral view; 5) Larval feeding damage; 6) Mature larva, dorsal view, with fecal covering partially removed; 7) Pupa; 8) Abandoned cocoon; 9) Adult.
Oenothera biennis (Onagraceae) - stem - showing leaf bases
Image of Oenothera biennis (Onagraceae) - stem - showing leaf bases
Oenothera biennis (Onagraceae) - inflorescence - lateral view of flower
Image of Oenothera biennis (Onagraceae) - inflorescence - lateral view of flower
Oenothera biennis (Onagraceae) - inflorescence - frontal view of flower
Image of Oenothera biennis (Onagraceae) - inflorescence - frontal view of flower
Oenothera biennis (Onagraceae) - leaf - on upper stem
Image of Oenothera biennis (Onagraceae) - leaf - on upper stem
Oenothera biennis (Onagraceae) - inflorescence - lateral view of flower
Image of Oenothera biennis (Onagraceae) - inflorescence - lateral view of flower
Oenothera biennis (Onagraceae) - inflorescence - unspecified
Image of Oenothera biennis (Onagraceae) - inflorescence - unspecified
Oenothera biennis (Onagraceae) - stem - showing leaf bases
Image of Oenothera biennis (Onagraceae) - stem - showing leaf bases
Oenothera biennis (Onagraceae) - whole plant - in flower - general view
Image of Oenothera biennis (Onagraceae) - whole plant - in flower - general view
Oenothera biennis (Onagraceae) - inflorescence - whole - unspecified
Image of Oenothera biennis (Onagraceae) - inflorescence - whole - unspecified
Oenothera fruticosa (Onagraceae) - fruit - juvenile
Image of Oenothera fruticosa (Onagraceae) - fruit - juvenile
Oenothera fruticosa (Onagraceae) - leaf - on upper stem
Image of Oenothera fruticosa (Onagraceae) - leaf - on upper stem
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