Extraocular modification of photoreception in intact and pinealectomized coturnix.
Extraocular modification of photoreception in intact and pinealectomized coturnix.
复制标题
完整和松果体切除的后庭感光的眼外修饰。
作者：
T. Siopes;Wilbor O. Wilson
摘要研究了松果体切除和双侧眼球摘除对雄性和雌性鹌鹑性成熟和光-性腺反应的影响。对雄性泄殖腔腺活动和雌性产卵率进行了观察。未成熟的男性和女性暴露于短（6L：18 D）光周期，直到性成熟。此后，一段时间的短日（6L：18 D）或完全黑暗交替使用长日（16 L：8D），以诱导性腺退化或复发，分别。这些交替期一直持续到59周龄。眼睛和松果体的存在对鹌鹑的性腺成熟和功能都不是必不可少的。加速性成熟的男性被观察到后，摘除，松果体切除术并没有改变这种反应。去核coturnix抵抗光诱导的性腺退化，松果体切除术并不能阻止这种反应。因此，眼睛似乎是必要的终止产卵和泄泻腺活动，由于缩短光周期。这些数据表明，眼外光诱导的性腺活动的修改，但没有牵连的松果体作为这些反应的功能介质。
Abstract The single and combined effects of pinealectomy and bilateral ocular enucleation on sexual maturation and the photo-gonadal response of male and female coturnix (Japanese quail, Coturnix coturnix japonica) were studied. Observations were made on cloacal gland activity in males and rate of egg production in females. Immature males and females were exposed to short (6L:18D) photoperiods until sexually mature. Thereafter, a period of either short days (6L:18D) or total darkness was used alternately with long days (16L:8D) to induce gonadal regression or recrudescence, respectively. These alternating periods were continued until the birds were 59 weeks old. Neither the presence of the eyes nor the pineal gland were essential to gonadal maturation and function in the coturnix. Accelerated sexual maturity of males was observed after enucleation, and pinealectomy did not alter this response. Enucleated coturnix were resistant to photo-induced gonadal regression, and pinealectomy did not prevent this response. Thus, the eyes appeared to be necessary for the termination of egg production and cloacal gland activity due to shortened photoperiods. The data indicated an extraocular modification of the photo-induced gonadal activity but did not implicate the pineal as a functional mediator of these responses.