Plant responses to elevated temperatures: a field study on phenological sensitivity and fitness responses to simulated climate warming.
Plant responses to elevated temperatures: a field study on phenological sensitivity and fitness responses to simulated climate warming.
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DOI：
10.1111/gcb.12430
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发表时间：
2014-02
影响因子：
11.6
通讯作者：
Kover PX
中科院分区：
文献类型：
--
作者：
Springate DA;Kover PX
全球平均气温的升高引起植物物候的显著变化。人们担心，加速的物候会对植物种群产生负面影响。然而，健身的物候变化的后果，在温度升高的反应还没有得到很好的理解，特别是在田间条件下。我们解决这个问题，通过暴露一组重组自交系拟南芥在该领域的模拟全球变暖的治疗。我们发现，植物暴露于高温开花早，预测光热模型。然而，与生活史的权衡预期相反，它们也以更大的营养体尺寸开花，这表明变暖可能导致营养体发育加速。虽然变暖增加平均健身（水果生产）约。25%，存在显著的基因型-环境互作。适应度等级的变化表明，如果适应性进化有限，即将到来的气候变化可能导致种群在新环境中不适应。因此，种群的遗传组成可能会发生变化，这取决于物种的世代时间和温度变化的速度。有趣的是，表现出较强的物候反应的基因型在高温下具有较高的适应性，这表明物候敏感性可能是一个很好的指标，在基因型水平以及在物种水平的高温下的成功。
Significant changes in plant phenology have been observed in response to increases in mean global temperatures. There are concerns that accelerated phenologies can negatively impact plant populations. However, the fitness consequence of changes in phenology in response to elevated temperature is not well understood, particularly under field conditions. We address this issue by exposing a set of recombinant inbred lines of Arabidopsis thaliana to a simulated global warming treatment in the field. We find that plants exposed to elevated temperatures flower earlier, as predicted by photothermal models. However, contrary to life-history trade-off expectations, they also flower at a larger vegetative size, suggesting that warming probably causes acceleration in vegetative development. Although warming increases mean fitness (fruit production) by ca. 25%, there is a significant genotype-by-environment interaction. Changes in fitness rank indicate that imminent climate change can cause populations to be maladapted in their new environment, if adaptive evolution is limited. Thus, changes in the genetic composition of populations are likely, depending on the species’ generation time and the speed of temperature change. Interestingly, genotypes that show stronger phenological responses have higher fitness under elevated temperatures, suggesting that phenological sensitivity might be a good indicator of success under elevated temperature at the genotypic level as well as at the species level.
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DOI：
10.1111/j.1558-5646.2010.01175.x
发表时间：
2011-03
期刊：
Evolution; international journal of organic evolution
影响因子：
--
作者：
Anderson JT;Lee CR;Mitchell-Olds T
通讯作者：
Mitchell-Olds T
影响因子：
4.9
作者：
Gardner, KM;Latta, RG
通讯作者：
Latta, RG
影响因子：
4.5
作者：
Brachi B;Faure N;Horton M;Flahauw E;Vazquez A;Nordborg M;Bergelson J;Cuguen J;Roux F
通讯作者：
Roux F
影响因子：
56.9
作者：
Johanson, U;West, J;Dean, C
通讯作者：
Dean, C
影响因子：
56.9
作者：
Fitter, AH;Fitter, RSR
通讯作者：
Fitter, RSR