Scholarlink

<p><i>Saccharina japonica</i> (kelp) is central to seaweed aquaculture and tissue toughness is a first-order trait because it governs losses both at sea and during the very first post-harvest handling. We compared two co-cultivated groups with contrasting brittleness (Group E and T) using tensile–fracture tests, a cryo sample preparation system, periodic acid-Schiff stain (PAS) histochemistry, and quantitative assays of major wall polysaccharides. Group E showed consistently superior mechanical performance (higher stiffness, strength, yield metrics, and elongation at break), thicker, more densely packed cell walls, and higher wall-polysaccharide content than Group T, while M/G composition was broadly similar between groups. These concordant patterns indicate that matrix abundance and wall organization, rather than alginate M/G ratio, are proximate drivers of tissue toughness in <i>S. japonica</i>. By mechanistically linking cell-wall composition to macroscale mechanical behavior, our findings point to actionable targets for line selection and for cultivation/handling practices that reduce storm- and processing-related losses.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Brittleness in farmed Saccharina japonica is traced to cell wall composition and organization

  • 期刊论文

  • 发表日期：

    2026年5月16日

查看全文
  • Wenxuan Wang,
  • Xiaodong Li,
  • Lihua Geng,
  • Shaojun Pang,
  • Xiaofei Leng,
  • Quanbin Zhang

摘要

Saccharina japonica (kelp) is central to seaweed aquaculture and tissue toughness is a first-order trait because it governs losses both at sea and during the very first post-harvest handling. We compared two co-cultivated groups with contrasting brittleness (Group E and T) using tensile–fracture tests, a cryo sample preparation system, periodic acid-Schiff stain (PAS) histochemistry, and quantitative assays of major wall polysaccharides. Group E showed consistently superior mechanical performance (higher stiffness, strength, yield metrics, and elongation at break), thicker, more densely packed cell walls, and higher wall-polysaccharide content than Group T, while M/G composition was broadly similar between groups. These concordant patterns indicate that matrix abundance and wall organization, rather than alginate M/G ratio, are proximate drivers of tissue toughness in S. japonica. By mechanistically linking cell-wall composition to macroscale mechanical behavior, our findings point to actionable targets for line selection and for cultivation/handling practices that reduce storm- and processing-related losses.