Extent of adaptation is not limited by unpredictability of the environment in laboratory populations of        <i >Escherichia coliEscherichia coli

Karve Shraddha M.; Bhave Devika; Dey Sutirth

摘要

Abstract > Environmental variability is on the rise in different parts of the earth, and the survival of many species depends on how well they cope with these fluctuations. Our current understanding of how organisms adapt to unpredictably fluctuating environments is almost entirely based on studies that investigate fluctuations among different values of a single environmental stressor such as temperature or <fc>pH</fc> . How would unpredictability affect adaptation when the environment fluctuates between qualitatively very different kinds of stresses? To answer this question, we subjected laboratory populations of Escherichia coli to selection over ~?260 generations. The populations faced predictable and unpredictable environmental fluctuations across qualitatively different selection environments, namely, salt and acidic <fc>pH</fc> . We show that predictability of environmental fluctuations does not play a role in determining the extent of adaptation, although the extent of ancestral adaptation to the chosen selection environments is of key importance. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：ID =“JEB13338-ABS-ABS-0001”XML：Lang =“EN”> <标题类型=“main”>抽象</ title> >环境变异性在不同的增加地球的部分，许多物种的生存取决于他们如何应对这些波动。我们目前了解有机体如何适应不可预测性的波动环境，几乎完全基于研究单个环境压力源的不同值的波动，例如温度或<Fc> pH </ Fc>。当环境在定性非常不同的压力之间波动时，如何将不可预测性会影响适应性？为了回答这个问题，我们遭受了对大肠杆菌的实验室群体来选择〜260代。人群面对定性不同的选择环境，即盐和酸性<fc> pH </ Fc>的可预测和不可预测的环境波动。我们表明，环境波动的可预测性在确定适应程度方面不会发挥作用，尽管对所选择的选择环境的祖先适应程度具有重要意义。 </ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34394/'>《Journal of evolutionary biology》</a> <b style="margin: 0 2px;">|</b><span>2018年第9期</span><b style="margin: 0 2px;">|</b><span>共7页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Karve Shraddha M.&option=202" target="_blank" rel="nofollow">Karve Shraddha M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bhave Devika&option=202" target="_blank" rel="nofollow">Bhave Devika;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dey Sutirth&option=202" target="_blank" rel="nofollow">Dey Sutirth;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Population Biology Laboratory Biology DivisionIndian Institute of Science Education and Research PunePune Maharashtra India;</p> <p>Population Biology Laboratory Biology DivisionIndian Institute of Science Education and Research PunePune Maharashtra India;</p> <p>Population Biology Laboratory Biology DivisionIndian Institute of Science Education and Research PunePune Maharashtra India;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/173.html" title="普通生物学">普通生物学;</a><a href="https://www.zhangqiaokeyan.com/clc/1283.html" title="生物演化与发展">生物演化与发展;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=experimental evolution&option=203" rel="nofollow">experimental evolution;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=extent of adaptation&option=203" rel="nofollow">extent of adaptation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fluctuating environments&option=203" rel="nofollow">fluctuating environments;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=unpredictability&option=203" rel="nofollow">unpredictability;</a> </p> <div class="translation"> 机译：实验演化;适应程度;波动环境;不可预测性; 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Extent of adaptation is not limited by unpredictability of the environment in laboratory populations of Escherichia coliEscherichia coli

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