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WIND AFFECTS MORPHOLOGY, FUNCTION, AND CHEMISTRY OF EUCALYPT TREE SEEDLINGS

机译:乌贼树苗的风态,形态和化学特性

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Wind is a powerful abiotic influence on plants that is predicted to increase with global warming. The resulting changes to plant function and interaction with herbivores are likely to have significant ecological, forestry, and agricultural consequences. We used a glasshouse manipulative study to test the effects of wind exposure on a range of morphological, functional, and chemical characteristics of seedlings of Eucalyptus tereticornis, a widespread coastal tree. Chronic wind exposure (6 wk of 3 h d~(-1)) resulted in reduced height growth and leaf area, thicker leaf cuticle, slightly higher leaf dry matter, and greater phenolic concentration. Chronic and acute (single 3-h pulse) exposure to wind induced greater variability in minimum epidermal water conductance. The changes that occurred to seedlings show the significance of wind as an active abiotic agent in shaping plants. The changes, particularly if they are maintained or enhanced over time, may alter rates of herbivory and have the potential to lead to cascading ecological consequences that are especially relevant as climate changes.
机译:风是对植物的强大非生物影响,预计会随着全球变暖而增加。植物功能的变化以及与食草动物的相互作用可能会对生态,林业和农业产生重大影响。我们进行了一项温室操作研究,以测试风的暴露对宽阔的沿海树木桉树(Eucalyptus tereticornis)幼苗的一系列形态,功能和化学特性的影响。长期风(6 wk of 3 h d〜(-1))导致高度增长和叶片面积减少,叶片表皮变厚,叶片干物质含量略高以及酚类浓度升高。长期和急性(3小时单脉冲)暴露在风中会导致最小表皮水导率的更大变化。幼苗发生的变化表明风是塑造植物中活性非生物活性剂的重要性。这种变化,尤其是随着时间的推移而得以维持或增强的变化,可能会改变食草率,并有可能导致级联的生态后果,这与气候变化特别相关。

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