ArticlePlanta2025
Reduction of galactose side chains in type II arabinogalactan alters homogalacturonan methyl esterification in Arabidopsis thaliana seed coat mucilage.
Article in Planta, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed.
- Trimming galactose side chains of arabinogalactan proteins alters pectin and hemicellulose deposition in secondary cell walls of Arabidopsis thaliana floral stem internodes.Plant & cell physiology · 2026Article
- A Regulatory Network of Arabinogalactan Proteins, Glycosylation, and Nucleotide Sugars for Optimizing Mara des Bois Strawberries Postharvest Storage Quality.Plants (Basel, Switzerland) · 2025Article
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Authors and funding
4 authors.
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Abstract
MAIN
conclusionTrimming of β-(1,3) and β-(1,6)-galactosyl residues from type II arabinogalactan side chains causes an increase in the methyl esterification degree of homogalacturonan in Arabidopsis seed coat mucilage. Arabinogalactan proteins (AGPs) are involved in various physiological processes, such as cell elongation, xylem differentiation, resistance to abiotic stresses or secretion and adherence of seed coat mucilage, a structure suggested as a model system for cell wall studies. The specific roles of AGPs are not fully established, although their carbohydrate motif (type II arabinogalactan, AGII) seems to be essential, being able to mediate interactions with different signalling molecules or with other cell wall polysaccharides. The aim of the present work is to determine the role of AGII from AGPs in the structural organization of the cell wall, using Arabidopsis thaliana plants that overproduce β-galactosidase βV-Gal from Cicer arietinum (35S::βV-Gal plants), an enzyme that acts specifically on the β-(1,3) and β-(1,6)-galactosyl bonds of AGII. The characterization of the seed coat mucilage has allowed us to establish a cell wall homeostasis mechanism in which the neutral side chains of the AGII of the AGPs determine the degree of HG methyl esterification. Thus, the reduction in the galactose is accompanied by an increase in the level of esterification, probably as a compensatory mechanism to maintain the mechanical properties of this specialized cell wall and its hydration properties.
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