Poorter Hendrik, Knopf Oliver, Wright Ian J, Temme Andries A, Hogewoning Sander W, Graf Alexander, Cernusak Lucas A, Pons Thijs L
Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany.
Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia.
New Phytol. 2022 Feb;233(4):1560-1596. doi: 10.1111/nph.17802. Epub 2021 Nov 26.
Generalised dose-response curves are essential to understand how plants acclimate to atmospheric CO . We carried out a meta-analysis of 630 experiments in which C plants were experimentally grown at different [CO ] under relatively benign conditions, and derived dose-response curves for 85 phenotypic traits. These curves were characterised by form, plasticity, consistency and reliability. Considered over a range of 200-1200 µmol mol CO , some traits more than doubled (e.g. area-based photosynthesis; intrinsic water-use efficiency), whereas others more than halved (area-based transpiration). At current atmospheric [CO ], 64% of the total stimulation in biomass over the 200-1200 µmol mol range has already been realised. We also mapped the trait responses of plants to [CO ] against those we have quantified before for light intensity. For most traits, CO and light responses were of similar direction. However, some traits (such as reproductive effort) only responded to light, others (such as plant height) only to [CO ], and some traits (such as area-based transpiration) responded in opposite directions. This synthesis provides a comprehensive picture of plant responses to [CO ] at different integration levels and offers the quantitative dose-response curves that can be used to improve global change simulation models.
广义剂量反应曲线对于理解植物如何适应大气CO₂至关重要。我们对630个实验进行了荟萃分析，在这些实验中，C₃植物在相对温和的条件下于不同的[CO₂]浓度下进行实验种植，并得出了85个表型性状的剂量反应曲线。这些曲线具有形状、可塑性、一致性和可靠性等特征。在200 - 1200 μmol mol⁻¹ CO₂范围内，一些性状增加了一倍多（例如基于面积的光合作用；内在水分利用效率），而其他性状则减少了一半以上（基于面积的蒸腾作用）。在当前大气[CO₂]浓度下，在200 - 1200 μmol mol⁻¹范围内生物量总刺激的64%已经实现。我们还将植物对[CO₂]的性状反应与我们之前针对光强量化的反应进行了对比。对于大多数性状，CO₂和光的反应方向相似。然而，一些性状（如繁殖投入）仅对光有反应，其他性状（如株高）仅对[CO₂]有反应，还有一些性状（如基于面积的蒸腾作用）反应方向相反。这一综合分析提供了植物在不同整合水平下对[CO₂]反应的全面图景，并提供了可用于改进全球变化模拟模型的定量剂量反应曲线。
