红条毛肤石鳖齿舌形态及矿物成分含量  

MORPHOLOGY AND MINERAL CONTENTS OF THE RADULA OF CHITON (ACANTHOCHITON RUBROLINEATUS LISCHKE)

作　　者：刘传琳[1] 赵见高[2] 崔龙波[1] 刘兴杰[3] 

机构地区：[1]烟台大学生化系,山东烟台264005 [2]中国科学院物理研究所磁学国家重点实验室,北京100080 [3]福山成人中专,山东烟台255000

出　　处：《动物学报》2001年第5期553-557,T001,共6页ACTA ZOOLOGICA SINICA

摘　　要：在光镜和扫描电镜下对红条毛肤石鳖齿舌的组成及各种齿片形态进行了较详细的观察 ,齿舌的每一排由 17个齿片组成 ,形态各异。采用原子吸收法对齿舌中的钾、钙、钠、镁、铬、铁、钴和锰 8种元素含量进行了测定 ,其中铁元素含量最高 ,达齿舌干重的 14 6% ,其次为镁 ,其它元素含量依次为钠、钙、钾、锰、铬和钴 ;并且齿舌在生长过程中通过不断的积累矿物元素而使齿舌的不同部位矿化程度有所差异 ,矿化程度由重至轻依次为齿舌前段、中段、后段和末段 ;在研究中发现齿舌中含有磁性物质Fe3O4,并且磁性物质主要存在于第1侧齿的齿尖上。The Chiton (Acanthochiton rubrolineatus Lischke) is a herbivorous mollusk, living in the intertidal environments, and it belongs to the class Polyplacophora. The Chiton has a long tongue like radula, which is an important organ for feeding. Morphology of the radula was observed in detail with light and electron microscopes. For a mature Chion, it has 40～50 rows of teeth, and those teeth are all reverse. Each row was consisted of 17 teeth, and the morphology of the teeth was diverse. Among the 17 teeth, three teeth were central ones, three teeth were lateral ones, and four teeth were marginal ones. Those teeth were heavily biomineralized, with some inorganic minerals, such as silicon, phosphorus, sulphur and some metal elements, potassium, calcium, iron etc, deposits in these radula teeth. As the quantity of the minerals in the different segments of radula changes, degree of the biomineralzation increased continuously from posterior to anterior end of the radula. Thus, the anterior of the radula was mineralized heavily more than the posterior. The concentration of eight elements: potassium, calcium, sodium, magnesium, iron, cobalt, chromium and manganese were analyzed with atomic absorptive spectrum. The results showed that concentration of iron, a major element, was about 14 6% weight of the dried radula. It ranked first among these elements, and magnesium ranked the second, and sodium, calcium, and potassium, cobalt chromium; and manganese was the lowest in quantity in turn. Concentration of eight elements changes in the different segments, but in quantity, the element magnesium varies greatest among the eight elements. The quantities of five main elements (iron, magnesium, sodium, potassium and caleium) were 67% weight of total minerals in the radula, and the concentration of eight mental elements in the radula was much larger than their concentration in seawater. Obviously, the eight elements are greatly richened in the Chiton radula.During the studies, it was found that the radula contained amounts of

关 键 词：红条毛肤石鳖 齿舌 扫描电镜 原子吸收 矿物含量 磁性 形态 

分 类 号：Q959.63[生物学—动物学]