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Updated: Jan 16, 2026

Fluorescent Immunolocalization of Arabinogalactan Proteins and Pectins in the Cell Wall of Plant Tissues
Published on: February 27, 2021
Arabinogalactan proteins: Decoding the multifaceted roles in plant reproduction
Jessy Silva1, Diana Moreira1, Maria João Ferreira1
1LAQV/REQUIMTE, Biology Department, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal.
None:
Arabinogalactan proteins (AGPs) are highly glycosylated cell wall proteins essential for plant growth and reproduction. AGPs are extensively decorated with arabinogalactan polysaccharides, composed primarily of arabinose and galactose, along with minor sugars such as glucuronic acid, fucose, and rhamnose. Their glycosylation patterns and glycosylphosphatidylinositol anchor enable interactions with receptors, modulating signal transduction pathways critical for reproduction. AGPs also associate with cell wall components like pectin and hemicellulose, impacting cellulose deposition and cell wall integrity. Recent research highlights AGPs' role as calcium (Ca2+) capacitors, regulating Ca2+ storage and release during crucial reproductive stages. Despite significant progress, their precise molecular mechanisms remain elusive. In this review, we explore the multifaceted roles of AGPs in plant reproduction, shedding light on the recent progress in their involvement in signalling pathways, cell wall interactions, and Ca2+ homeostasis, while highlighting the ongoing research needed to fully understand their mechanisms in reproductive success.
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