Solanaceae Source

A global taxonomic resource for the nightshade family

Oct 1st, 2021 - Andrea Berardi

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 Meeting ID: 943 3314 6166, password: Solanaceae

Watch this talk in TouTube:

Friday, October 1, 2021 - 17:15
Wed, 2022-01-19 17:20 -- rocio

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith