光照对多甲藻生物钟的相位和周期的影响是由不同途径介导的吗？

Are the effects of light on phase and period of the Gonyaulax clock mediated by different pathways?

作者信息

Roenneberg T, Hastings J W

机构信息

Department of Cellular and Developmental Biology, Harvard University, Cambridge, MA 02138.

出版信息

Photochem Photobiol. 1991 Apr;53(4):525-33. doi: 10.1111/j.1751-1097.1991.tb03665.x.

DOI:10.1111/j.1751-1097.1991.tb03665.x

PMID:1857747

Abstract

The effects of different wavelengths of light on period, phase shifting, entrainment and after-effects of the circadian clock of the motile marine dinoflagellate Gonyaulax polyedra are described. Phase shifting and entrainment by light can be explained by the action of a single blue sensitive light input pathway. However, tonic effects of light on the period under free-running conditions, and also after-effects on period resulting from single 4 h light exposures, appear to involve two input pathways with different absorption and temperature characteristics. These results suggest different mechanisms for the control of phase and period of the circadian clock.

摘要

本文描述了不同波长的光对运动性海洋甲藻多甲藻（Gonyaulax polyedra）昼夜节律钟的周期、相位移动、同步化及后效应的影响。光引起的相位移动和同步化可以通过单一的蓝光敏感光输入途径的作用来解释。然而，在自由运行条件下光对周期的持续效应，以及单次4小时光照对周期产生的后效应，似乎涉及两条具有不同吸收和温度特性的输入途径。这些结果表明，昼夜节律钟的相位和周期控制存在不同机制。