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作 者 ：孙雨辰, 于浩, 郑寨生, 张尚法, 丁林贤, 蔡妙珍

期 刊 ：植物科学学报 2015年 33卷 2期 页码：244-250

关键词：藕莲；根状茎；铁膜特性；化学组成；

Keywords:Nelumbo nucifera Gaertn., Rhizome, Iron plaque characterization, Chemical composition,

摘 要 ：以10个藕莲(Nelumbo nucifera Gaertn.)品种为材料,比较分析了其根状茎表面的铁膜厚度及化学组成。结果显示:总Fe含量最高的是‘尖头白荷’,其次是‘鄂莲6号’和‘温州山东藕’,最低的是‘鄂莲7号’和‘苏州花藕’;根状茎表面的铁膜中Fe (Ⅲ)和Fe (Ⅱ)分别占总Fe含量的64.1%~85.8%和14.2%~35.9%。扫描电子显微镜(SEM)观察发现,铁膜表面呈絮状或颗粒状;能谱分析(EDX)检测到铁膜中存在Fe、C、O、Al、Si,随着铁膜增厚还在‘尖头白荷’根状茎表面的铁膜中检测到K、P和Ca。本研究通过对藕莲根状茎表面的铁膜特性及成分比较,发现供试的10个品种中‘鄂莲7号’和‘苏州花藕’属于铁膜低沉积品种。

Abstract:Ten lotus (Nelumbo nucifera Gaertn.) cultivars were used to investigate the amounts and chemical composition of iron plaque on the rhizome surface. Iron formed a continuous precipitate on the rhizome surface. ‘Jiantoubaihe’ had the largest amounts of total Fe on the surface of the lotus rhizomes, followed by ‘Elian No.6’ and ‘Wenzhoushangdongou’, with ‘Elian No.7’ and ‘Suzhouhuaou’ having the least total Fe. Most of the total Fe was Fe (Ⅲ) (64.1%-85.8%), with a small percentage of Fe (Ⅱ) (14.2%-35.9%). Scanning electron micrographs (SEM) demonstrated that the iron plaque was unevenly distributed on the rhizome surface, and had a porous or flocculent structure. Energy dispersive X-ray (EDX) showed that the iron plaque mainly contained Fe, C, O, Al and Si. In addition K, P and Ca were also detected on the rhizome surface of ‘Jiantoubaihe’. Among the ten cultivars, ‘Elian No.7’ and ‘Suzhouhuaou’ formed the thinnest iron plaque.

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