养殖紫菜的退色现象与其色素及金属元素含量关系的研究  

Studies on the Relationship between the Discoloration of Edible Laver and the Contents of Pigments and Metal Elements

作　　者：杨若明[1] 张经华[2] 

机构地区：[1]中央民族大学生命与环境科学学院,北京100081 [2]北京市理化分析测试中心,北京100089

出　　处：《现代科学仪器》2006年第6期76-80,共5页Modern Scientific Instruments

基　　金：北京市科学技术研究院留学人员工作专项资金120067。

摘　　要：测定了正常生长和退色紫菜中的光合色素叶绿素、类胡萝卜素及藻胆色素蛋白,包括藻红蛋白、藻蓝蛋白和变藻蓝蛋白的含量;同时对不同紫菜样品中的Fe、P等微量及常量元素进行了分析。计算了叶绿素a、藻胆色素蛋白与Fe、Zn、Mn、P等元素的相关系数,发现它们之间呈明显的正比例关系,其中Fe与以上色素的相关性最好。因为Fe是生物体内合成上述4类吡咯类色素所不可缺少的微量元素,所以在实验室内对退色紫菜进行了外源性添加Fe3+实验,发现该紫菜中的色素含量有明显提高。本文提出∶与陆地植物的黄化病一样,缺少Fe等微量元素可能是造成紫菜退色现象的直接原因之一。The contents of photosynthetic pigments, chlorophyll, carotenoid and phycobiliproteins such as phycoerythrin, phycocyanin and allophycocyanin in normal and in discolored edible laver were determined. Simultaneously, the contents of metal elements such as Fe, Zn, Mn, Cu and Petc were also measured, and the coefficients of correlation between elements and pigments were calculated. The direct proportion relation between them was observed, especially stronger between Fe and chlorophyll a and phycobiliproteins. Because of Fe is an essential element ：in the biosynthetic pathway of tetrapyrroles in pigments, Fe^3＋ fertilizers on the recovery of discolored laver was applied exogenously in the laboratory, and that brought about a pigmental convalescence. Like occurred among terrestrial plants termed ＂lime-induced ehlorosis＂, the deficiency of trace elements especially Fe would be the main origin for discoloration phenomenon of edible laver.

关 键 词：退色 紫菜 铁 藻胆蛋白 

分 类 号：S968.431[农业科学—水产养殖]