Abstract：
:It is known that plant cells can contain multiple distinct vacuoles; however, the abundance of multivacuolar cells and the mechanisms underlying vacuolar differentiation and communication among different types of vacuoles remain unknown. PH1 and PH5 are tonoplast P-ATPases that form a heteromeric pump that hyper-acidifies the central vacuole (CV) of epidermal cells in petunia petals. Here, we show that the sorting of this pump and other vacuolar proteins to the CV involves transit through small vacuoles: vacuolinos. Vacuolino formation is controlled by transcription factors regulating pigment synthesis and transcription of PH1 and PH5. Trafficking of proteins from vacuolinos to the central vacuole is impaired by misexpression of vacuolar SNAREs as well as mutants for the PH1 component of the PH1-PH5 pump. The finding that PH1-PH5 and these SNAREs interact strongly suggests that structural tonoplast proteins can act as tethering factors in the recognition of different vacuolar types.
journal_name
Cell Repjournal_title
Cell reportsauthors
Faraco M,Li Y,Li S,Spelt C,Di Sansebastiano GP,Reale L,Ferranti F,Verweij W,Koes R,Quattrocchio FMdoi
10.1016/j.celrep.2017.05.076subject
Has Abstractpub_date
2017-06-20 00:00:00pages
2413-2422issue
12issn
2211-1247pii
S2211-1247(17)30750-7journal_volume
19pub_type
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