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  4. Role of vacuoles in phosphorus storage and remobilization
 
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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)
SHU-YI YANG  
Huang, Teng Kuei
Kuo, Hui Fen
Chiou, Tzyy Jen
DOI
https://api.elsevier.com/content/abstract/scopus_id/85018471192
10.1093/jxb/erw481
URI
https://scholars.lib.ntu.edu.tw/handle/123456789/414329
URL
https://api.elsevier.com/content/abstract/scopus_id/85018471192
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
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