%0 Journal Article
%T Position in the evolution of reproductive endocrine of amphioxus,Branchiostoma belcheri
%A Yongqiang Fang
%J Chinese Science Bulletin
%@ 1861-9541
%D 1998
%I 
%R 10.1007/BF02898905
%X This review summarizes the recent discoveries of many authors who found that in amphioxus Hatschek¡¯s pit is capable of synthesizing vertebrate gonadotropin-like substance, and that the content of gonadotropin-releasing hormone in the amphioxus¡¯ body shows a positive correlation with the reproductive cycle, and that the sex steroid hormone exists in gonads. Exogenous hormones could promote gonadal development, maturation and reproductive activity in amphioxus. A possible implication might be that the reproductive activity in amphioxus is regulated by reproductive hormones like vertebrate, indicating the existence of primitive reproductive endocrine regulatory axis, brain vesicle-Hatschek¡¯s pit-gonads axis, as compared with regulatory axis of vertebrate. It will provide a new line for establishing the position of reproductive endocrine evolution in lancelet.
%K amphioxus (lancelet)
%K Hatschek¡¯s pit
%K reproductive endocrine
%K evolution
%K gonadotropin-releasing hormone
%K gonadotropin
%K sex steriod hormone
%U http://link.springer.com/article/10.1007/BF02898905