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The role of arabinogalactan proteins (AGPs) in fruit ripening—a review

Authors
  • Leszczuk, Agata1
  • Kalaitzis, Panagiotis2
  • Blazakis, Konstantinos N.2
  • Zdunek, Artur1
  • 1 Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, Lublin, 20-290, Poland , Lublin (Poland)
  • 2 Department of Horticultural Genetics and Biotechnology, Mediterranean Agronomic Institute of Chania, Chania, Chania, 73100, Greece , Chania (Greece)
Type
Published Article
Journal
Horticulture Research
Publisher
Nature Publishing Group UK
Publication Date
Nov 01, 2020
Volume
7
Issue
1
Identifiers
DOI: 10.1038/s41438-020-00397-8
Source
Springer Nature
License
Green

Abstract

Arabinogalactan proteins (AGPs) are proteoglycans challenging researchers for decades. However, despite the extremely interesting polydispersity of their structure and essential application potential, studies of AGPs in fruit are limited, and only a few groups deal with this scientific subject. Here, we summarise the results of pioneering studies on AGPs in fruit tissue with their structure, specific localization pattern, stress factors influencing their presence, and a focus on recent advances. We discuss the properties of AGPs, i.e., binding calcium ions, ability to aggregate, adhesive nature, and crosslinking with other cell wall components that may also be implicated in fruit metabolism. The aim of this review is an attempt to associate well-known features and properties of AGPs with their putative roles in fruit ripening. The putative physiological significance of AGPs might provide additional targets of regulation for fruit developmental programme. A comprehensive understanding of the AGP expression, structure, and untypical features may give new information for agronomic, horticulture, and renewable biomaterial applications.

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