Evolution of flower shape in Plantago lanceolata

Reardon, Wesley; Fitzpatrick, David A.; Fares, Mario A.; Nugent, Jacqueline M.

doi:10.1007/s11103-009-9520-z

Cited by 22 publications

(37 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To determine copy-number and orthology/ paralogy relationships among floral symmetry genes, multiple clones derived from PCR using various CYC-, RAD-, and DIV-like primer sets were sequenced from D. purpurea, V. serpyllifolia, P. major, P. lanceolata, and A. abietina. Consistent with previous studies, only one CYC-like gene was isolated from P. major (PmTCP1) and P. lanceolata (PlTCP1), three were isolated from D. purpurea (DpCYC1, DpCYC2, and DpCYC3), and two were isolated from V. serpyllifolia (VsCYC1 and VsCYC2) (14,27,(33)(34)(35). Similar to V. serpyllifolia, two putatively functional CYC-like genes were also isolated from A. abietina (AaCYC1 and AaCYC2).…”

Section: Floral Symmetry Gene Degeneration In Representative Species Ofsupporting

confidence: 87%

“…4K). The wide expression pattern of PmTCP1 across the flower was similar to that previously found for its V. serpyllifolia ortholog, VsCYC2, but different from the dorsal expression patterns of orthologs DpCYC2 and DpCYC3 and that reported for P. lanceolata (27,34).…”

Section: Floral Symmetry Gene Degeneration In Representative Species Ofsupporting

confidence: 78%

“…It is hypothesized that changes in the expression or biochemical function of genes that establish the ancestral condition of floral bilateral symmetry underlie the evolution of radial symmetry in the Aragoa/Plantago clade (8,21,27). The floral symmetry genetic pathway is best understood in A. majus, and involves the action of three dorsal identity genes, CYCLOIDEA (CYC), DICHOTOMA (DICH), and RADIALIS (RAD), and one ventral identity gene, DIVARICATA (DIV) (13,(28)(29)(30)(31)(32).…”

mentioning

confidence: 99%

“…Unlike close relatives Veronica serpyllifolia and D. purpurea, which have two and three CYC-like genes, respectively, only one CYC-like gene has been recovered from Plantago lanceolata (ribwort plantain; subgenus Psyllium sensu lato) and P. major (common plantain; subgenus Plantago) genomes, suggesting a recent gene loss event in the Plantago lineage (14,18,27,(33)(34)(35). Furthermore, Reardon et al recently demonstrated that expression of this gene does not appear to be confined to the dorsal region of the P. lanceolata flower (27).…”

mentioning

confidence: 99%

“…Furthermore, Reardon et al recently demonstrated that expression of this gene does not appear to be confined to the dorsal region of the P. lanceolata flower (27). Instead, evidence suggests expression in the region below the flower, correlating with the loss of differentiated dorsal flower identity and a shift to radial symmetry.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Gradual disintegration of the floral symmetry gene network is implicated in the evolution of a wind-pollination syndrome

Preston

Martinez

Hileman

2011

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

Angiosperms exhibit staggering diversity in floral form, and evolution of floral morphology is often correlated with changes in pollination syndrome. The showy, bilaterally symmetrical flowers of the model species Antirrhinum majus (Plantaginaceae) are highly specialized for bee pollination. In A. majus, CYCLOIDEA (CYC), DICHOTOMA (DICH), RADIALIS (RAD), and DIVARICATA (DIV) specify the development of floral bilateral symmetry. However, it is unclear to what extent evolution of these genes has resulted in flower morphological divergence among closely related members of Plantaginaceae differing in pollination syndrome. We compared floral symmetry genes from insect-pollinated Digitalis purpurea, which has bilaterally symmetrical flowers, with those from closely related Aragoa abietina and wind-pollinated Plantago major, both of which have radially symmetrical flowers. We demonstrate that Plantago, but not Aragoa, species have lost a dorsally expressed CYC-like gene and downstream targets RAD and DIV. Furthermore, the single P. major CYC-like gene is expressed across all regions of the flower, similar to expression of its ortholog in closely related Veronica serpyllifolia. We propose that changes in the expression of duplicated CYC-like genes led to the evolution of radial flower symmetry in Aragoa/Plantago, and that further disintegration of the symmetry gene pathway resulted in the wind-pollination syndrome of Plantago. This model underscores the potential importance of gene loss in the evolution of ecologically important traits.

show abstract

Section: Floral Symmetry Gene Degeneration In Representative Species Ofsupporting

confidence: 87%

Section: Floral Symmetry Gene Degeneration In Representative Species Ofsupporting

confidence: 78%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Gradual disintegration of the floral symmetry gene network is implicated in the evolution of a wind-pollination syndrome

Preston

Martinez

Hileman

2011

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

Generation and classification of transcriptomes in two Croomia species and molecular evolution of CYC/TB1 genes in Stemonaceae

et al. 2018

Plant Diversity

View full text Add to dashboard Cite

The genus Croomia (Stemonaceae) is an excellent model for studying the evolution of the Eastern Asia (EA)–Eastern North America (ENA) floristic disjunction and the genetic mechanisms of floral zygomorphy formation. In addition to the presence of both actinomorphic and zygomorphic flowers within the genus, species are disjunctively distributed between EA and ENA. However, due to the limited availability of genomic resources, few studies of Croomia have examined these questions. In this study, we sequenced the floral and leaf transcriptomes of the zygomorphic flowered Croomiaheterosepala and the actinomorphic flowered Croomia japonica, and used comparative genomic approaches to investigate the transcriptome evolution of the two closely related species. The sequencing and de novo assembly of transcriptomes from flowers of C. heterosepala (ChFlower), flowers of C. japonica (CjFlower), and leaves of C. japonica (CjLeaf) yielded 57,193, 62,131 and 64,448 unigenes, respectively. In addition, estimation of Ka/Ks ratios for 11,566 potential orthologous groups between ChFlower and CjFlower revealed that only six pairs had Ka/Ks ratios significantly greater than 1 and are likely under positive selection. A total of 429 single copy nuclear genes (SCNGs) and 21,460 expression sequence tags-simple sequence repeats (EST-SSRs) were identified in this study. Specifically, we identified seven CYC/TB1-like genes from Stemonaceae. Phylogenetic and molecular evolution analyses indicated that these CYC/TB1-like genes formed a monophyletic clade (SteTBL1) and were subject to strong purifying selection. The shifts of floral symmetry in Stemonaceae do not appear to be correlated with TBL copy number.

show abstract