photoperiodism

What is the adaptive significance of photoperiodism during evolution?

在演化过程中生物或植物以光周期适应(环境)之意义为何?

But there were obvious spring and strong photoperiodism spike cultivars . These need to improvement.

近期育成的大穗品种多有明显的春性化、强感光性, 需要加以改进.

but there were obvious spring and strong photoperiodism tendencies among present big spike cultivars. these need to improvement.

近期育成的大穗品种多有明显的春性化、强感光性，需要加以改进。

Photoperiodism is one of the most important phenomena implicated in the control of seasonal development and life cycles in insects living in the temperate climatic zone because photoperiod influences the nymphal development and the number of nymphal instar.

光周期对分布于温带地区的蟋蟀季节发育、保证完整的生活史起着重要的作用，不仅影响若虫的发育速率，诱导卵滞育的产生，而且对若虫龄数也起着调控作用。

photoperiodism and diapause: seasonal adaptation in crickets of japanese islands

光周性和滞育：日本列岛蟋蟀的季节适应

For experimental purposes , scientists originally assumed that photoperiodism worked through photosynthesis.

为了进行实验, 科学家们最初曾经设想,光周期现象可能是通过光合作用实现的.