Role of vacuoles in phosphorus storage and remobilization
Journal
Journal of Experimental Botany
Journal Volume
68
Journal Issue
12
Pages
3045
Date Issued
2017-06-01
Author(s)
Abstract
© The Author 2017. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. Vacuoles play a fundamental role in storage and remobilization of various nutrients, including phosphorus (P), an essential element for cell growth and development. Cells acquire P primarily in the form of inorganic orthophosphate (Pi). However, the form of P stored in vacuoles varies by organism and tissue. Algae and yeast store polyphosphates (polyPs), whereas plants store Pi and inositol phosphates (InsPs) in vegetative tissues and seeds, respectively. In this review, we summarize how vacuolar P molecules are stored and reallocated and how these processes are regulated and co-ordinated. The roles of SYG1/PHO81/XPR1 (SPX)-domain-containing membrane proteins in allocating vacu-olar P are outlined. We also highlight the importance of vacuolar P in buffering the cytoplasmic Pi concentration to maintain cellular homeostasis when the external P supply fluctuates, and present additional roles for vacuolar polyP and InsP besides being a P reserve. Furthermore, we discuss the possibility of alternative pathways to recycle Pi from other P metabolites in vacuoles. Finally, future perspectives for researching this topic and its potential application in agriculture are proposed.
Subjects
Autophagy | Inositol phosphate | Orthophosphate | Phosphate transporter | Phosphorus | Polyphosphate | SPX domain | Vacuole
Publisher
OXFORD UNIV PRESS
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
erw481.pdf
Size
701.81 KB
Format
Adobe PDF
Checksum
(MD5):55db00b31e7cbf56eca5a828a22bd916