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Dataset results
111 results for “Phlox”
Phlox paniculata (Polemoniaceae) - stem - showing leaf bases
Image of Phlox paniculata (Polemoniaceae) - stem - showing leaf bases
Phlox paniculata (Polemoniaceae) - leaf - on upper stem
Image of Phlox paniculata (Polemoniaceae) - leaf - on upper stem
Phlox paniculata (Polemoniaceae) - whole plant - in flower - general view
Image of Phlox paniculata (Polemoniaceae) - whole plant - in flower - general view
Phlox paniculata (Polemoniaceae) - inflorescence - frontal view of flower
Image of Phlox paniculata (Polemoniaceae) - inflorescence - frontal view of flower
Phlox paniculata (Polemoniaceae) - inflorescence - lateral view of flower
Image of Phlox paniculata (Polemoniaceae) - inflorescence - lateral view of flower
Phlox divaricata (Polemoniaceae) - inflorescence - whole - unspecified
Image of Phlox divaricata (Polemoniaceae) - inflorescence - whole - unspecified
Phlox divaricata (Polemoniaceae) - whole plant - in flower - general view
Image of Phlox divaricata (Polemoniaceae) - whole plant - in flower - general view
Phlox paniculata (Polemoniaceae) - leaf - on upper stem
Image of Phlox paniculata (Polemoniaceae) - leaf - on upper stem
Phlox paniculata (Polemoniaceae) - inflorescence - lateral view of flower
Image of Phlox paniculata (Polemoniaceae) - inflorescence - lateral view of flower
Phlox paniculata (Polemoniaceae) - stem - showing leaf bases
Image of Phlox paniculata (Polemoniaceae) - stem - showing leaf bases
Phlox paniculata (Polemoniaceae) - inflorescence - lateral view of flower
Image of Phlox paniculata (Polemoniaceae) - inflorescence - lateral view of flower
Phlox paniculata (Polemoniaceae) - whole plant - in flower - general view
Image of Phlox paniculata (Polemoniaceae) - whole plant - in flower - general view
Phlox paniculata (Polemoniaceae) - inflorescence - frontal view of flower
Image of Phlox paniculata (Polemoniaceae) - inflorescence - frontal view of flower
Phlox paniculata (Polemoniaceae) - inflorescence - whole - unspecified
Image of Phlox paniculata (Polemoniaceae) - inflorescence - whole - unspecified
Data from: Intraspecific cytotypic variation and complicated genetic structure in the Phlox amabilis-P. woodhousei (Polemoniaceae) complex
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Data from: Molecular signatures of selection on reproductive character displacement of flower color in Phlox drummondii
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Data from: The cost of reinforcement: selection on flower color in allopatric populations of Phlox drummondii
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Data from: Genomic evidence of gene flow during reinforcement in Texas Phlox
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Data from: Evolution of floral traits and impact of reproductive mode on diversification in the phlox family (Polemoniaceae)
Pollinator-mediated selection is a major driver of evolution in flowering plants, contributing to the vast diversity of floral features. Despite long-standing interest in floral variation and the evolution of pollination syndromes in Polemoniaceae, the evolution of floral traits and known pollinators has not been investigated in an explicit phylogenetic context. Here we explore macroevolutionary patterns of both pollinator specificity and three floral traits long considered important determinants of pollinator attraction across a nearly complete species-level phylogenetic tree for the family. This phylogenetic tree is the most comprehensive yet produced for Polemoniaceae. The presence of floral chlorophyll is reconstructed as the ancestral character state of the family, even though the presence of floral anthocyanins is the most prevalent floral pigment in extant taxa. Mean corolla length and width of the opening of the floral tube are correlated, and both appear to vary with pollinator type. The evolution of pollination systems appears labile, with multiple gains and losses of selfing and conflicting implications for patterns of diversification. Explicit testing of diversification models rejects the hypothesis that selfing is an evolutionary dead-end. This study begins to disentangle the individual components that comprise pollination syndromes and lays the foundation for future work on the genetic mechanisms that control each trait.
Data from: The relationship between post-mating reproductive isolation and reinforcement in Phlox
The process of speciation involves the accumulation of reproductive isolation (RI) between diverging lineages. Selection can favor increased RI via the process of reinforcement, whereby costs to hybridization impose selection for increased prezygotic RI. Reinforcement results in phenotypic divergence within at least one taxon, as a result of costly hybridization between sympatric taxa. The strength of selection driving reinforcement is determined by the cost of hybridization and the frequency of hybridization. We investigated the cost of hybridization by quantifying post-mating RI barriers among Phlox species that comprise one of the best-studied cases of reinforcement. We determined if the strength of RI differs among lineages that have and have not undergone reinforcement, how much variability there is within species in RI, and whether RI is associated with phylogenetic relatedness. We found high RI for the species that underwent phenotypic divergence due to reinforcement; however, RI was also high between other species pairs. We found extensive variability in RI among individuals within species, and no evidence that the strength of RI was associated with phylogenetic relatedness. We suggest that phenotypic divergence due to reinforcement is associated with the frequency of hybridization and introgression, and not the cost of hybridization in this clade.
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