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首页> 外文期刊>IAWA Journal >Changes in wood anatomical traits in Scots pine under different climate-change scenarios
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Changes in wood anatomical traits in Scots pine under different climate-change scenarios

机译：不同气候变化情景下苏格兰松木木解剖学性状的变化

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Although cell-anatomical variables are promising proxies reflecting seasonal as well as annual climate changes, their interdependencies are not yet fully understood. In the present study we assessed the changes in tree-ring width and various wood anatomical traits, including wall thickness, lumen diameter and tracheid diameter in the radial direction in saplings of Pinus sylvestris under six climatic conditions:5 degrees C warmer alone (ET) or combined with drought in June (ETJ) and in August (ETA) and CO2 enrichment alone (EC, 770 ppm) or combined with drought in June (ECJ) and in August (ECA). The experiments related to temperature conditions using 2-year saplings and CO2 conditions using 3-year saplings were completed in 2009 and 2010 in a greenhouse, respectively. Results showed that tree-ring width and tracheid diameter were not affected by any of the conditions applied, but the lumen diameter was larger and the wall thickness was thinner than those under control conditions. These reactions were verified under ETJ in the warming treatment and under all conditions under CO2 enrichment conditions. Our results indicated that drought counteracted the effects of elevated CO2 concentrations on wood anatomical properties, signifying complex interactions between the two major effects of climate change. Our comparison of wood parameters through experiments highlight the potential effect of climate change - increased drought stress due to higher temperatures and water shortage as well as elevated ambient CO2, on tracheid lumen diameter and wall thickness. Whereas the ring-width and tracheid diameter practically remained unaffected under the above-mentioned conditions.
机译：虽然细胞解剖变量是反映季节性以及年度气候变化的有前途的代理，但它们的相互依赖性尚未完全理解。在本研究中，我们评估了树木宽度和各种木材解剖性状的变化，包括在六气候条件下松弛的圆形方向的径向径向壁厚，腔直径和径向直径：单独5摄氏度（et）或与6月（ETJ）和8月（ETA）和二氧化碳富集（EC，770ppm）和6月（ECJ）和8月（ECA）联合干旱的二月（EC）和二氧化碳富集。在2009年和2010年在温室中分别在2009年和2010年完成了与使用2年树苗和CO2条件的温度条件相关的实验。结果表明，树环宽度和颅内径不受所施加的任何条件的影响，但腔直径较大，壁厚比在控制条件下的条件薄。这些反应在预热治疗中并在CO 2富集条件下的所有条件下验证了ETJ。我们的结果表明，干旱造成升高的CO2浓度对木质解剖性能的影响，在气候变化的两个主要影响之间表示复杂的相互作用。我们通过实验对木材参数的比较突出了气候变化的潜在影响 - 由于较高的温度和水资源短缺以及升高的环境二氧化碳，升高的环境二氧化碳直径和壁厚。然而，在上述条件下，环宽和粗管直径实际上不受影响。

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