Osunkoya Olusegun O, Boyne Richard, Scharaschkin Tanya
Invasive Plant & Animal Science Research Group, Biosecurity Queensland, Department of Agriculture, Fisheries and Forestry, Ecosciences Precinct, GPO Box 267, Brisbane, QLD 4001, Australia.
School of Earth, Environment and Biological Sciences, Queensland University of Technology, Brisbane, Qld 4001, Australia Herbarium, Library, Art and Archives, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK.
Am J Bot. 2014 Sep;101(9):1423-36. doi: 10.3732/ajb.1400125. Epub 2014 Sep 17.
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Plant invasiveness can be promoted by higher values of adaptive traits (e.g., photosynthetic capacity, biomass accumulation), greater plasticity and coordination of these traits, and by higher and positive relative influence of these functionalities on fitness, such as increasing reproductive output. However, the data set for this premise rarely includes linkages between epidermal-stomatal traits, leaf internal anatomy, and physiological performance.•
Three ecological pairs of invasive vs. noninvasive (native) woody vine species of South-East Queensland, Australia were investigated for trait differences in leaf morphology and anatomy under varying light intensity. The linkages of these traits with physiological performance (e.g., water-use efficiency, photosynthesis, and leaf construction cost) and plant adaptive traits of specific leaf area, biomass, and relative growth rates were also explored.•
Except for stomatal size, mean leaf anatomical traits differed significantly between the two groups. Plasticity of traits and, to a very limited extent, their phenotypic integration were higher in the invasive relative to the native species. ANOVA, ordination, and analysis of similarity suggest that for leaf morphology and anatomy, the three functional strategies contribute to the differences between the two groups in the order phenotypic plasticity > trait means > phenotypic integration.•
The linkages demonstrated in the study between stomatal complex/gross anatomy and physiology are scarce in the ecological literature of plant invasiveness, but the findings suggest that leaf anatomical traits need to be considered routinely as part of weed species assessment and in the worldwide leaf economic spectrum.
研究前提：适应性性状的较高值（例如光合能力、生物量积累）、这些性状更强的可塑性和协调性，以及这些功能对适合度的更高且为正的相对影响（如增加繁殖输出），均可促进植物的入侵性。然而，支持这一前提的数据集很少包括表皮气孔性状、叶片内部解剖结构与生理性能之间的联系。
方法：对澳大利亚昆士兰东南部的三对入侵性与非入侵性（本地）木本藤本植物物种进行了研究，调查它们在不同光照强度下叶片形态和解剖结构的性状差异。还探究了这些性状与生理性能（例如水分利用效率、光合作用和叶片构建成本）以及比叶面积、生物量和相对生长速率等植物适应性性状之间的联系。
关键结果：除气孔大小外，两组之间的平均叶片解剖性状存在显著差异。入侵物种的性状可塑性以及在非常有限的程度上其表型整合度高于本地物种。方差分析、排序和相似性分析表明，对于叶片形态和解剖结构，三种功能策略对两组差异的贡献顺序为表型可塑性＞性状均值＞表型整合度。
结论：该研究中气孔复合体/大体解剖结构与生理之间所展示的联系，在植物入侵性的生态学文献中较为少见，但研究结果表明，叶片解剖性状应作为杂草物种评估的一部分以及全球叶片经济谱的一部分被常规考虑。
