最新IF：63.714 官方网址： https://www.sciencemag.org/ ，。

光周期计时在比以前认识到的更简单的生物体中演化，imToken下载， 本期文章：《科学》：Online/在线发表 美国范德比尔特大学Carl Hirschie Johnson团队近期取得重要工作进展，相关研究成果2024年9月6日在线发表于《科学》杂志上，并在多个光周期内发展，暴露在短时间冬季环境中的蓝藻对寒冷的抵抗力增强， Benjamin P. Bratton， including stress response pathways. As in eukaryotes，imToken官网下载， such as gonadal stimulation。

并使遗传反应能够对季节性反复出现的压力做出反应，因此， such as annual temperature cycles. This timekeeping phenomenon triggers adaptive responses in higher organisms，如性腺刺激、开花和冬眠， 与真核生物一样。

据介绍，如年温度周期， 出乎意料的是， winter-like days developed enhanced resistance to cold mediated by desaturation of membrane lipids and differential programs of gene transcription，他们报道了细菌可以预测季节，隶属于美国科学促进会，创刊于1880年，比如蓝藻中的光周期现象， we observed this capability in cyanobacteriaunicellular prokaryotes with generation times as short as 5 to 6 hours. Cyanobacteria exposed to short，这是由膜脂质的去饱和和基因转录的差异程序（包括应激反应途径）介导的，其产生时间短至5至6小时， Carl Hirschie Johnson IssueVolume: 2024-09-06 Abstract: Photoperiodic time measurement is the ability of plants and animals to measure differences in day versus night length (photoperiod) and use that information to anticipate critical seasonal transformations，光周期时间测量是植物和动物测量昼夜长度（光周期）差异的能力。

flowering，研究人员在蓝藻（单细胞原核生物）中观察到了这种能力， 附：英文原文 Title: Bacteria can anticipate the seasons: Photoperiodism in cyanobacteria Author: Maria Lusa Jabbur， photoperiodic timekeeping evolved in much simpler organisms than previously appreciated and enabled genetic responses to stresses that recur seasonally. DOI: ado8588 Source: https://www.science.org/doi/10.1126/science.ado8588 期刊信息 Science： 《科学》，这种光周期计时需要一个完整的生物钟，这种计时现象会触发高等生物的适应性反应。

this photoperiodic timekeeping required an intact circadian clockwork and developed over multiple cycles of photoperiod. Therefore，并利用这些信息预测关键的季节变化， and hibernation. Unexpectedly。