Extrinsic light:dark cycles, rather than endogenous circadian cycles, affect the photoperiodic counter in the pitcher-plant mosquito, Wyeomyia smithii
Extrinsic light:dark cycles, rather than endogenous circadian cycles, affect the photoperiodic counter in the pitcher-plant mosquito, Wyeomyia smithii
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DOI：
10.1007/s00359-008-0334-2
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发表时间：
2008-07-01
影响因子：
2.1
通讯作者：
Holzapfel, Christina M.
中科院分区：
文献类型：
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作者：
Emerson, Kevin J.;Letaw, Alathea D.;Holzapfel, Christina M.
各种各样的生物利用光周期（日长）作为环境线索来预测季节的变化，并确定各种生命史事件（如休眠和迁徙）的时间。光周期时间测量由两个主要部分组成，(1)区分长短日的光周期计时器，以及(2)积累和存储计时器信息并诱导表型输出的光周期计数器。在这里，我们使用延长的夜间处理来表明，光对于在蚊子的地理范围内积累光周期信息是必要的，并且光周期计数器计数外部（外部）光：黑暗周期，而不是内源性（内部）昼夜周期。
A wide diversity of organisms use photoperiod (daylength) as an environmental cue to anticipate the changing seasons and to time various life-history events such as dormancy and migration. Photoperiodic time measurement consists of two main components, (1) the photoperiodic timer that discriminates between long and short days, and (2) the photoperiodic counter that accumulates and stores information from the timer and then induces the phenotypic output. Herein, we use extended night treatments to show that light is necessary to accumulate photoperiodic information across the geographic range of the mosquito, Wyeomyia smithii and that the photoperiodic counter counts extrinsic (external) light:dark cycles and not endogenous (internal) circadian cycles.