Journal Article

Arabinogalactan proteins in root and pollen-tube cells: distribution and functional aspects

Eric Nguema-Ona, Sílvia Coimbra, Maïté Vicré-Gibouin, Jean-Claude Mollet and Azeddine Driouich

in Annals of Botany

Published on behalf of The Annals of Botany Company

Volume 110, issue 2, pages 383-404
Published in print July 2012 | ISSN: 0305-7364
Published online July 2012 | e-ISSN: 1095-8290 | DOI: http://dx.doi.org/10.1093/aob/mcs143
Arabinogalactan proteins in root and pollen-tube cells: distribution and functional aspects

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  • Ecology and Conservation
  • Evolutionary Biology
  • Plant Sciences and Forestry

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Background

Arabinogalactan proteins (AGPs) are complex proteoglycans of the cell wall found in the entire plant kingdom and in almost all plant organs. AGPs encompass a large group of heavily glycosylated cell-wall proteins which share common features, including the presence of glycan chains especially enriched in arabinose and galactose and a protein backbone particularly rich in hydroxyproline residues. However, AGPs also exhibit strong heterogeneities among their members in various plant species. AGP ubiquity in plants suggests these proteoglycans are fundamental players for plant survival and development.

Scope

In this review, we first present an overview of current knowledge and specific features of AGPs. A section devoted to major tools used to study AGPs is also presented. We then discuss the distribution of AGPs as well as various aspects of their functional properties in root tissues and pollen tubes. This review also suggests novel directions of research on the role of AGPs in the biology of roots and pollen tubes.

Keywords: Arabinogalactan proteins; cell wall; root; pollen tube; growth; development; plant–microbe interactions; sexual reproduction; plant proteoglycans; Arabidopsis; Nicotiana

Journal Article.  16422 words.  Illustrated.

Subjects: Ecology and Conservation ; Evolutionary Biology ; Plant Sciences and Forestry

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