Functional Maturation of Neuroendocrine GonadalAxis is Altered by Specific Phase Relations of Circadian Neurotransmitter Activity in Japanese Quail

作     者：DORISPHILLIPS CHANDRAMOHINICHATURVEDI DORIS PHILLIPS AND CHANDRA MOHINI CHATURVEDI(Requests for reprint are to be addressed to C.M. Chaturvedi)(Department of Zoology, Banaras Hndu University,Varanasi-221005 India)

作者机构：DepartmentofZoologyBanarasHinduUniversityVaranasi－221005India DepartmentofZoologyBanarasHinduUniv 

出 版 物：《Biomedical and Environmental Sciences》 (生物医学与环境科学（英文版）)

年 卷 期：1995年第8卷第4期

页      面：367-377页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 1001[医学-基础医学(可授医学、理学学位)] 07[理学] 0905[农学-畜牧学] 09[农学] 090501[农学-动物遗传育种与繁殖] 071002[理学-动物学] 

主　　题：Activity 

摘      要：The present study was designed to ascertain the effects of temporal relationship of circadian neural oscillations on puberty attainment and reproductive growth of Japanese Quail, Coturnix coturnix japonica. Serotonin and dopamine precursors (5-hydroxytryptophan, 5-HTP and L-dihydroxyphenylalanine, L-DOPA; 5 mg/ 100 g body weight) were injected daily, 8 and 12 h apart in two groups of one-day old chicks, while controls received two daily injections of normal saline. Weekly/ biweekly observations (body weight, cloacal gland size, testicular volume and activity, ovarian follicular diameter and rate of egg production) were made until 9 weeks of age, wben the experiment was terminated. Results indicate that 8 h relationship completely suppressed gonadal growth even under long photoperiod (LD 16:8), while a 12 h relationship induced precocious sexual maturity and increased the rate of reproduction (spermatogenesis and egg production). It is concluded that circadian phase relationship of serotonergic and dopaminergic activity may not only determine the onset of reproduction in this poultry species, but may also alter the rate of reproduction possibly by affecting photoperiodic mechanism of reproductive regulation