Ultrastructure of spermatozoa of Bullacta exarata （philippi） and its significance on reproductive evolution and physio-ecological adaptation  

作　　者：应雪萍 杨万喜 姜乃澄 张永普 

机构地区：[1]SchoolofLifeandEnvironmentalScience,WenzhouNormalCollege,Wenzhou325027,China [2]CollegeofLifeSciencesZhejiangUniversity,Hangzhou310029,China

出　　处：《Journal of Zhejiang University Science》2004年第10期1211-1217,共7页浙江大学学报（自然科学英文版）

摘　　要：The morphology and ultrastructure of Bullacta exarata spermatozoa observed by light and transmission electron microscopy are presented in this paper. The spermatozoon is composed of head with a simple acrosomal complex and an elongated nucleus, and tail with a midpiece, principal piece and an end piece. The midpiece consists of a mitochondrial ring, and the principal piece is composed of axoneme and lateral fin. The structure of 5. exarata spermatozoa differs significantly from that of other gastropods, especially in the lateral fin and the principal piece, which was described scarcely before. A comparison is made between B. exarata and other gastropods, and its significance on reproductive evolution and physio-ecological adaptation is preliminarily discussed.The morphology and ultrastructure of Bullacta exarata spermatozoa observed by light and transmission electron microscopy are presented in this paper. The spermatozoon is composed of head with a simple acrosomal complex and an elongated nucleus, and tail with a midpiece, principal piece and an end piece. The midpiece consists of a mitochondrial ring, and the principal piece is composed of axoneme and lateral fin. The structure of B. exarata spermatozoa differs significantly from that of other gastropods, especially in the lateral fin and the principal piece, which was described scarcely before. A comparison is made between B. exarata and other gastropods, and its significance on reproductive evolution and physio-ecological adaptation is preliminarily discussed.

关 键 词：Bullacta exarata SPERMATOZOON ULTRASTRUCTURE EVOLUTION Physio-ecological adaptation 

分 类 号：Q959.212[生物学—动物学] Q954.43