Cell Wall Polymers Exert Distinct Effects on Mucilage Architecture and Adhesion to Help Seeds Attach to Substrates.

Pectin removal markedly reduces mucilage-mediated adhesion across four myxospermous species, while psyllium mucilage with hemicellulosic networks adheres more strongly than pectin-rich flax on rough, porous substrates.

• Why it matters: Seed establishment in harsh conditions is limited when seeds are displaced from suitable microsites, and mucilage-mediated attachment is a key but poorly mechanistically resolved contributor.
• What they did: Using light-sheet fluorescence microscopy, enzymatic digestion, physical characterization, and functional attachment assays, the study compared mucilage from Ocimum basilicum, Salvia hispanica, Plantago ovata, and Linum usitatissimum on heterogeneous surfaces under applied hydrostatic pressure.
• The result: Species-specific polysaccharide composition and fibrillar architecture produce distinct attachment modes, and mucilage transplanted onto non-myxospermous seeds confers functional attachment capabilities.

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