神经胞在太空中的昼夜节律:对内源外源问题进行重新检查
F M Sulzman1, D Ellman, C A Fuller
1Department of Biological Sciences, State University of New York, Binghamton 13901, USA.
概括
在Neurospora crassa中,循环节律保持了它们在空间中的周期,但清晰度降低了. 需要进一步分析,以确定太空飞行是否影响了计时机制或其表达.
科学领域:
- * * 时间生物学
- * * 太空生物学
- * 菌群学 * 菌群学
背景情况:
- *循环节律是内生生物过程,调节日常循环.
- * 这些节奏往往是由环境线索带动的,例如地球24小时的旋转.
- * 在没有这些线索的情况下了解昼夜功能对于长期太空任务至关重要.
研究的目的:
- * 在太空飞行条件下调查Neurospora crassa真菌中昼夜节律的功能.
- * 确定地球24小时周期的缺失是否会影响自由运行周期和昼夜节律的表达.
主要方法:
- * 监测了Neurospora crassa的结合节奏.
- * 在太空飞行期间,实验是在不断的黑暗中进行的.
- * 节奏的自由运行周期与地球控制器进行了比较.
主要成果:
- * 与地球相比,Neurospora crassa节奏的自由运行周期在太空中保持一致.
- *在太空飞行条件下观察到节奏清晰度的显著减少.
- *在一些实验样本中观察到明显的节律失常.
结论:
- *Neurospora crassa中昼夜节律的基本周期不会被太空飞行打乱.
- * 太空飞行可能会影响昼夜节律的表达或强度.
- *需要进一步的研究来区分对计时机制的影响与其表现.
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