Significance of photoperiodism and diapause control in the multicycle Crustacean Daphnia pulex Leydig
Significance of photoperiodism and diapause control in the multicycle Crustacean Daphnia pulex Leydig
复制标题
多周期甲壳动物间质水蚤光周期和滞育控制的意义
作者：
R. G. Stross
真核细胞经历细胞周期，或者在两个阻塞点之一停止生长，就像在能量转换引擎中一样。滞育描述了单细胞和多细胞个体的细胞周期中的生长停滞。它在一年周期中的时间位置是对外部环境的进化反应，它还负责向细胞中的受体或多细胞个体的神经整合器发送必要的信号。原生生物和甲壳类水蚤常见的“滞育综合症”包括细胞周期停滞，以及交配类型的诱导、配子发生、滞育阶段的包装和滞育的持续时间。细胞/生命周期可能会以各种季节性模式中断，这些模式由一种或多种已识别的外部信号触发，并由细胞和生物钟整合。水蚤在四种假定的基因型中表现出四种不同的胚胎滞育季节模式。滞育在生命周期中的生态意义可以在以下问题中寻求：1、无柄种群中时间和空间边界的环境控制；2、生命周期中滞育的生态影响。 2、应用滞育/休眠周期知识重新设计生态群落； 3、生态学中机械学和生物系统学方法的整合。
Eukaryote cells traverse the cell cycle, or become growth-arrested at one of two blockpoints, as in an engine of energy conversion. Diapause describes that growth arrest in the cell cycle(s), of single and multicellular individuals. Its temporal position in an annual cycle is an evolved response to the external environment, which is also responsible for sending the necessary signal(s) to receptors in the cell, or to the neural integrator of multicellular individuals.The ‘diapause syndrome’, common to protists and Crustacean waterfleas, includes the cell cycle arrest, as well as the induction of mating types, gametogenesis, packaging of the diapaused stage, and the duration of the diapause. The cell-/ life-cycle may be interrupted in a variety of seasonal patterns, which are triggered by one or more identified external signals and are integrated by cell and circadian clocks. Daphnia pulex displays four distinct seasonal patterns of embryonic diapause in four putative genotypes.The ecological implications of diapause in life cycles may be sought in such questions as 1, environmental control of temporal and spatial boundaries in sessile populations; 2, application of knowledge of diapause/dormancy cycles to redesigning ecological communities; and 3, integration of mechanistic and biosystematic approaches in ecology.
DOI：
10.1006/scel.1993.1010
发表时间：
1993-04
期刊：
Seminars in cell biology
影响因子：
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作者：
S. Kay
通讯作者：
S. Kay