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GENE CASCADE. "In the absence of RAD, DIVARICATA (DIV) localizes to the surface epidermal cells where it may up-regulate AmMYBL1 (a MIXTA-like gene), resulting (at least in Antirrhinum majus) in trichome formation throughout the corolla tube." http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn

SYMMETRIC GENE EXPRESSION. "In radially symmetrical flowers, expression of CYCLOIDEA2 (CYC2) genes have been shown to be either not expressed or ubiquitously expressed. When CYC2 is not expressed, RADIALIS (RAD) is no longer activated." (See Figure 1). http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn

BILATERAL HYPOTHESIS. "This sets up the hypothesis that species with bilaterally symmetrical flowers are homologous in their capacity to undergo a shift to dorsal expression, even though the location of gene expression itself is independently derived across independently evolved bilaterally symmetrical groups." http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn

GENE EXPRESSION SHIFT. "In core eudicots, members of the CYC2 clade of ECE genes independently shift from equivalent dorsoventral expression across the corolla (either ubiquitously expressed or not expressed) in radially symmetric flowers to dorsally restricted expression in bilaterally symmetrical flowers." http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn

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