Phenotypic plasticity and growth temperature: understanding interspecific variability
Phenotypic plasticity and growth temperature: understanding interspecific variability
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DOI：
10.1093/jxb/erj029
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发表时间：
2006-01-01
影响因子：
6.9
通讯作者：
Pons, TL
中科院分区：
文献类型：
--
作者：
Atkin, OK;Loveys, BR;Pons, TL
这篇综述的主题是温度的长期变化对植物生长及其基本成分的影响。讨论强调了代谢的热适应在多大程度上与一系列生化和形态特征的可塑性有内在联系。事实上，当植物在不同温度下生长时，温度介导的净同化率（NAR）变化和生物量分配[特别是比叶面积（SLA）]之间往往存在权衡。还讨论了温度介导的光合作用和呼吸作用的变化在确定NAR值的作用。结果表明，在比较中，不考虑生育，快速增长的物种表现出更大的温度依赖性的变化，比生长缓慢的植物RGR，SLA和NAR。对于RGR和NAR，这种趋势在系统发育独立对比中得以维持（即适应更有利栖息地的物种始终比适应不太有利栖息地的同类物种表现出更大的温度介导的变化）。相比之下，SLA并不总是更热塑性的物种从有利的栖息地。有趣的是，叶和根之间的生物量分配是一贯的塑料在缓慢生长的物种内的个别植物遗传独立的对比，当植物生长在对比的温度下。最后，种间变异NAR占RGR的变化，随着生长温度的降低，比例越来越大的突出。相反，SLA发挥了更主导的作用，在确定种间变异RGR在较高的生长温度，因此，SLA在确定种间变异RGR的重要性可能会增加，如果在未来的年平均温度增加。
The subject of this review is the impact of long-term changes in temperature on plant growth and its underlying components. The discussion highlights the extent to which thermal acclimation of metabolism is intrinsically linked to the plasticity of a range of biochemical and morphological traits. The fact that there is often a trade-off between temperature-mediated changes in net assimilation rates (NAR) and biomass allocation [in particular the specific leaf area (SLA)] when plants are grown at different temperatures is also highlighted. Also discussed is the role of temperature-mediated changes in photosynthesis and respiration in determining NAR values. It is shown that in comparisons that do not take phylogeny into account, fast-growing species exhibit greater temperature-dependent changes in RGR, SLA, and NAR than slow-growing plants. For RGR and NAR, such trends are maintained within phylogenetically independent contrasts (i.e. species adapted to more-favourable habitats consistently exhibit greater temperature-mediated changes than their congeneric counterparts adapted to less-favourable habitats). By contrast, SLA was not consistently more thermally plastic in species from favourable habitats. Interestingly, biomass allocation between leaves and roots was consistently more plastic in slow-growing species within individual phylogenetically independent contrasts, when plants were grown under contrasting temperatures. Finally, how interspecific variations in NAR account for an increasing proportion of variability in RGR as growth temperatures decrease is highlighted. Conversely, SLA played a more dominant role in determining interspecific variability in RGR at higher growth temperatures; thus, the importance of SLA in determining interspecific variation in RGR could potentially increase if annual mean temperatures increase in the future.