What season suits you best? Seasonal light changes and cyanobacterial competition

IF 1.2 Q3 PHYSICS, MULTIDISCIPLINARY

Papers in Physics Pub Date : 2013-11-21 DOI:10.4279/PIP.070005

Guadalupe Cascallares, P. M. Gleiser

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引用次数: 2

Abstract

Nearly all living organisms, including some bacterial species, exhibit biological processes with a period of about 24 h called circadian (from the Latin circa , about and dies , day) rhythms. These rhythms allow living organisms to anticipate the daily alternation of light and darkness. Experiments carried out in cyanobacteria have shown the adaptive value of circadian clocks. In theseexperiments, a wild type cyanobacterial strain (with a 24 h circadian rhythm) and a mutantstrain (with a longer or shorter period) grow in competition. In different experiments, the external light dark cycle was chosen to match the circadian period of the different strains, revealing that the strain whose circadian period matches the light-dark cycle has a larger fitness. As a consequence, the initial population of one strain grows while the other decays. These experiments were made under fixed light and dark intervals. In Nature, however, this relationship changes according to the season. Therefore, seasonalchanges in light could affect the results of the competition. Using a theoretical model, we analyze how modulation of light can change the survival of the different cyanobacterial strains. Our results show that there is a clear shift in the competition due to the modulation of light, which could be verified experimentally. Received: 20 Novembre 2014, Accepted: 29 March 2015; Edited by: C. A. Condat, G. J. Sibona; DOI: http://dx.doi.org/10.4279/PIP.070005 Cite as: G Cascallares, P M Gleiser, Papers in Physics 7, 070005 (2015) This paper, by G. Cascallares, P. M. Gleiser , is licensed under the Creative Commons Attribution License 3.0 .

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什么季节最适合你?季节性光照变化和蓝藻的竞争

几乎所有的生物体，包括一些细菌物种，都表现出以24小时为周期的生物过程，称为昼夜节律(来自拉丁语circa，大约和死亡，天)节律。这些节律使生物体能够预测每天的明暗交替。在蓝藻中进行的实验显示了生物钟的适应价值。在这些实验中，一种野生型蓝藻菌株(24小时昼夜节律)和一种突变菌株(更长或更短的周期)在竞争中生长。在不同的实验中，选择外部光暗周期来匹配不同菌株的昼夜周期，发现昼夜周期匹配的菌株具有更大的适应度。结果，一种菌株的初始种群增长，而另一种则衰减。这些实验是在固定的明暗间隔下进行的。然而，在自然界中，这种关系随着季节的变化而变化。因此，光照的季节性变化可能会影响比赛的结果。利用理论模型，我们分析了光的调制如何改变不同蓝藻菌株的生存。我们的研究结果表明，由于光的调制，竞争发生了明显的变化，这可以通过实验来验证。收稿日期:2014年11月20日，收稿日期:2015年3月29日;编辑:C. A. Condat, G. J. Sibona;本文由G. Cascallares, P. M. Gleiser撰写，采用知识共享署名许可3.0协议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Papers in Physics PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.90

自引率

0.00%

发文量

期刊介绍： Papers in Physics publishes original research in all areas of physics and its interface with other subjects. The scope includes, but is not limited to, physics of particles and fields, condensed matter, relativity and gravitation, nuclear physics, physics of fluids, biophysics, econophysics, chemical physics, statistical mechanics, soft condensed matter, materials science, mathematical physics and general physics. Contributions in the areas of foundations of physics, history of physics and physics education are not considered for publication. Articles published in Papers in Physics contain substantial new results and ideas that advance the state of physics in a non-trivial way. Articles are strictly reviewed by specialists prior to publication. Papers in Physics highlights outstanding articles published in the journal through the Editors'' choice section. Papers in Physics offers two distinct editorial treatments to articles from which authors can choose. In Traditional Review, manuscripts are submitted to anonymous reviewers seeking constructive criticism and editors make a decision on whether publication is appropriate. In Open Review, manuscripts are sent to reviewers. If the paper is considered original and technically sound, the article, the reviewer''s comments and the author''s reply are published alongside the names of all involved. This way, Papers in Physics promotes the open discussion of controversies among specialists that are of help to the reader and to the transparency of the editorial process. Moreover, our reviewers receive their due recognition by publishing a recorded citable report. Papers in Physics publishes Commentaries from the reviewer(s) if major disagreements remain after exchange with the authors or if a different insight proposed is considered valuable for the readers.