Britez Ricardo M, Watanabe Toshihiro, Jansen Steven, Reissmann Carlos B, Osaki Mitsuru
Department of Soils, Federal University of Paraná, C. Postal 2959, 89.035-050, Curitiba/PR, Brazil.
Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kitaku, Sapporo 060-8589, Japan.
New Phytol. 2002 Dec;156(3):437-444. doi: 10.1046/j.1469-8137.2002.00531.x.
• The relationship between high aluminium (Al) and silicon (Si) levels in Faramea marginata was investigated and the hypothesis tested that the coexisting accumulation of these elements is associated. • Mineral concentrations of Al, Si and calcium (Ca) were analysed in 30 samples by atomic absorption spectrophotometry and the spectrophotometric molybdenum blue method. Extraction patterns of Al and Si from leaves were compared with Melastoma malabathricum, rice (Oryza sativa), aluminium silicate, and silicon dioxide. The localization of Al and Si was studied using pyrocatechol violet staining of sections and fluorescent X-ray analytical microscopy. • A positive correlation occurred between the Al and Si levels and both elements showed a similar distribution in leaf and stem tissues. The Al and Si elution patterns were similar to those of aluminium silicate. • These results suggest the formation of an Al-Si complex in the shoot tissues of F. marginata, which may substantially contribute to the internal detoxification of Al.
• 研究了滨海法瑞木中高铝（Al）和硅（Si）水平之间的关系，并对这些元素共存积累有关联这一假设进行了验证。
• 通过原子吸收分光光度法和分光光度钼蓝法分析了30个样品中Al、Si和钙（Ca）的矿物质浓度。将叶片中Al和Si的提取模式与野牡丹、水稻（Oryza sativa）、硅酸铝和二氧化硅进行了比较。使用邻苯二酚紫染色切片和荧光X射线分析显微镜研究了Al和Si的定位。
• Al和Si水平之间存在正相关，且两种元素在叶和茎组织中表现出相似的分布。Al和Si的洗脱模式与硅酸铝相似。
• 这些结果表明滨海法瑞木茎组织中形成了Al-Si复合物，这可能对Al的内部解毒有很大贡献。
