【摘要】 光周期计数器是光周期反应系统的一个重要组成部分,它累积和储存光周期循环中的光周期信息,当存贮的信息总量超过一个内部阈值时,诱导(滞育和非滞育;有性和无性)就会随之发生。本文报导了昆虫和螨类光周期计数器的一些特点,主要包括以下几方面的内容:(1)光周期信息的积累主要发生在光敏感期内;(2)光周期信息的积累存在一个阈值,即需要积累一定数量的长夜或短夜循环去诱导50%的个体发育或滞育;(3)光周期信息的积累受温度、地理纬度和食料的影响;(4)长夜和短夜循环的光周期信息积累的方式;(5)光周期信息的积累的数量反应和质量反应;(6)光周期计数器的内分泌调控。更多还原

【Abstract】 Photoperiodic counter is an important part of photoperiodic response. It accumulates and stores photoperiodic information contained in a sequence of light-dark cycles. Induction (diapasue and nondiapause; sex and non-sex) supervenes when summation surpasses the internal threshold. The review reports some characters of the photoperiodic counter in insects and mites, including the following aspects: (1) the accumulation of photoperiodic information during photoperiodic sensitive period of insects.(2) the threshold of photoperiodic information accumulation, i.e. the required day number for making 50% individuals response.(3) the accumulation of photoperiodic information affected by temperature, altitude and food.(4) the way of photoperiodic information accumulation in long-night and short-night cycles.(5) quantitative and qualitative-reactions in the accumulation of photoperiodic information.(6)endocrine control of the photoperiodic counter.更多还原