Next SolSeminar will be presented by Andrea Berardi on Independent re-gains of floral color in Petunia
Abstract. The genus Petunia has undergone a number impactful number of changes in floral color, morphology and scent. In this talk, I will focus on floral color, which is a crucial signal to attract pollinators. Two sister species, Petunia secreta and Petunia exserta, have both undergone re-gains of floral color. However, each species took a different approach: Petunia secreta underwent trait reversal through the unlikely resurrection of the key MYB transcription factor, AN2 (ANTHOCYANIN2), restoring the ancestral purple floral color and bee pollination. The red hummingbird pollinated Petunia exserta, however, retains a nonfunctional copy of AN2. Floral color is reinstated intstead by moderate upregulation and a shift in tissue specificity of an AN2 paralog, DEEP PURPLE, and shifted towards red through a series of expression changes in flavonoid biosynthetic genes. Together, these two stories represent both “simple” and “complex” genetic mechanisms of floral color transitions.
When? Friday Oct 1st 4 pm (GMT+1)
The zoom link to join the meeting is https://cuboulder.zoom.us/j/94333146166 Meeting ID: 943 3314 6166, password: Solanaceae
Watch this talk in TouTube: https://youtu.be/4Hom_mJCuxA
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