摘要
An endogenous circadian system is responsible for the rhythms observed in many physiological and behavioural traits in most organisms. In insects, the circadian system controls the periodicity of eclosion, egg-laying, locomotor and mating activity. The parasitoid wasp Nasonia vitripennis has been extensively used to study the role of the circadian system in photoperiodism. In this study, behavioural activities expected to be under the control of the endogenous circadian system were characterized in Nasonia. Male emergence from the host puparium is rhythmic under light–darkness conditions while eclosion from the own pupal integument is not rhythmic but continuous. Following entrainment in light–dark conditions, males show robust free-running circadian activity rhythms with a period (τ, tau) of approximately 25.6 h in constant darkness. While the endogenous circadian system is enough to trigger male emergence in Nasonia, light seems to have a modulatory effect: when present it induces more males to emerge. Our results add to the understanding of chronobiological phenotypes in insects and provide a basis towards the molecular characterization of the endogenous circadian system in Nasonia.
摘要译文
一种内源性生理系统负责在许多生理和行为特征观察在大多数生物体的节奏。在昆虫，昼夜系统控制羽化，产卵，运动和交配活动的周期性。寄生蜂金小蜂vitripennis已被广泛用来研究昼夜系统在光周期的作用。在这项研究中，有望成为内源性生理系统的控制下的行为活动特征金小蜂。从主机puparium男性出现是在明暗条件节奏，而从自己的蛹羽化珠是不是节奏，但连续的。下面夹带在光线暗的条件下，男性表现出了强劲的时期自由运行昼夜活动节律（而内源性昼夜系统，就足以引发男性出现在金小蜂，光似乎有一个调节作用：现在，当它诱使更多的男性出现。我们的结果添加到时间生物学的表型的认识中的昆虫，并提供朝向内源性生理系统在金小蜂的分子表征的基础。
Rinaldo C. Bertossa[a][b]; Jeroen van Dijk[b]; Domien G. Beersma[a]; Leo W. Beukeboom[b]. Circadian rhythms of adult emergence and activity but not eclosion in males of the parasitic wasp Nasonia vitripennis[J]. Journal of Insect Physiology, 2010,56(7): 805–812