Article
Hyperacidification of vacuoles by the combined action of two different P-ATPases in the tonoplast determines flower color.
Cell reports - 16 Jan 2014
Faraco Marianna, Spelt Cornelis, Bliek Mattijs, Verweij Walter, Hoshino Atsushi, Espen Luca, Prinsi Bhakti, Jaarsma Rinse, Tarhan Eray, de Boer Albertus H, Di Sansebastiano Gian-Pietro, Koes Ronald, Quattrocchio Francesca M
Abstract excerpt
The acidification of endomembrane compartments is essential for enzyme activities, sorting, trafficking, and trans-membrane transport of various compounds. Vacuoles are mildly acidic in most plant cells because of the action of V-ATPase and/or pyrophosphatase proton pumps but are hyperacidified in specific cells by mechanisms that remained unclear. Here, we show that the blue petal color of petunia ph mutants is...
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