不同生长时期虾夷扇贝壳质的超微结构观察及表面5种元素组成分析

Analysis of shell microstructure and five surface elements of Patinopecten yessoensis at different ages

以人工吊养的已明确月龄的(5月龄、7月龄、9月龄、12月龄、18月龄、30月龄)虾夷扇贝(Patinopecten(Mizuhopecten)yessoensis)为实验材料,从壳顶沿生长线方向纵切,用扫描电镜观察了不同生长时期贝壳的壳质结构,并探讨了虾夷扇贝生长发育过程中壳质结构的一般性变化规律。结果表明,虾夷扇贝壳质包括均质型(homogeneous)、叶状型(foliated)、交错片状型(crossed lamellar)、棱柱型(prismatic)4种结构类型。随着生长期的增加,壳质结构逐渐趋向于复杂,叶状结构和交错片状结构的比例增加。同时分析比较了同一时期"象牙白"品系和普通红褐色虾夷扇贝的贝壳外表面5种化学元素的含量,"象牙白"品系和普通红褐色贝壳所含的C、O、Na、Mg、Ca 5种元素质量分数分别为:24.26%、60.44%、0.63%、0.48%、14.18%和18.24%、56.48%、0.52%、0.36%、24.41%。

In this study, Patinopecten yessoensis at different ages （5 months, 7 months, 9 months, 12 months, 18 months, and 30 months old） was investigated. Scanning electron microscope （SEM） was used to observe the longi- tudinal section of different ages of shells given by cutting shells along the growth lines. The variation laws of shell structure in the process of growth and development were explored. The results showed that the shell microstructure consisted of homogeneous, foliated, crossed lamellar and prismatic. Shell structure gradually tended to be complex and the proportion of foliated and foliated increased with growth. Meanwhile, five kinds of mineral elements taken from the outer surface of shell were investigated. The results showed that the element content percentages of C, O, Na, Mg and Ca from ＂Ivory＂ strains of Patinopecten yessoensis and ordinary individuals were 24.26%, 60.44%, 0.63%, 0.48% and 14.18%, 18.24%, 56.48%, 0.52%, 0.36% and 24.41%, respectively.