Data from: Weak coordination between leaf structure and function among closely related tomato species

AbstractTheory predicts that natural selection should favor coordination between leaf physiology, biochemistry and anatomical structure along a functional trait spectrum from fast, resource-acquisitive syndromes to slow, resource-conservative syndromes. However, the coordination hypothesis has rarely been tested at a phylogenetic scale most relevant for understanding rapid adaptation in the recent past or for the prediction of evolutionary trajectories in response to climate change. We used a common garden to examine genetically based coordination between leaf traits across 19 wild and cultivated tomato taxa. We found weak integration between leaf structure (e.g. leaf mass per area) and physiological function (photosynthetic rate, biochemical capacity and CO2 diffusion), even though all were arrayed in the predicted direction along a ‘fast–slow’ spectrum. This suggests considerable scope for unique trait combinations to evolve in response to new environments or in crop breeding. In particular, we found that partially independent variation in stomatal and mesophyll conductance may allow a plant to improve water-use efficiency without necessarily sacrificing maximum photosynthetic rates. Our study does not imply that functional trait spectra, such as the leaf economics spectrum, are unimportant, but that many important axes of variation within a taxonomic group may be unique and not generalizable to other taxa., Usage notesZip file with trait data, phylogeny, and supplemental tablesdata.* Leaf anatomical and physiological traits from 19 tomato taxa (in Excel and CSV formats) globalGm.R R code to make Figure 5 and statistically compare LMA-gm relationship in tomatoes to a global dataset Tomato18cos_ultra.tre 18-gene ultrametric phylogenetic tree in Newick format TableS1.csv Key to species name abbreviations in data table and tree TableS3.csv Global dataset of gm and LMADryad.zip

【摘要】理论预测，自然选择会青睐沿功能性状谱协调叶片生理、生化与解剖结构的组合，该性状谱从快速资源获取型综合征延伸至慢速资源保守型综合征。然而，这一协调假说极少在系统发育尺度上得到检验，而该尺度恰恰对理解近期的快速适应，或是预测应对气候变化的演化轨迹具有关键意义。本研究通过同质园实验（common garden），对19个野生和栽培番茄类群的叶片性状间基于遗传的协调关系进行了检测。研究发现，叶片结构（例如比叶重（leaf mass per area, LMA））与生理功能（光合速率、生化容量及CO₂扩散能力）之间的整合度较弱，尽管所有性状均沿“快-慢”谱按预期方向排布。这表明，针对新环境或作物育种的独特性状组合演化存在大量空间。具体而言，我们发现气孔导度（stomatal conductance）与叶肉导度（mesophyll conductance, gm）存在部分独立的变异，这或许能让植物在提升水分利用效率（water-use efficiency, WUE）的同时，不必牺牲最大光合速率。本研究并非否定功能性状谱（例如叶片经济谱（leaf economics spectrum））的重要性，而是表明某一类群内部的诸多重要变异轴可能具有独特性，无法推广至其他类群。

【使用说明】Dryad.zip：包含性状数据、系统发育树与补充表格的压缩包，内含以下文件：
1. 19个番茄类群的叶片解剖与生理性状文件（Excel与CSV格式）
2. globalGm.R：用于生成图5，并统计学比较番茄中LMA与gm的关系与全球数据集的R代码
3. Tomato18cos_ultra.tre：采用Newick格式的18基因超度量系统发育树
4. TableS1.csv：数据表格及系统发育树中物种名称缩写的对照表
5. TableS3.csv：gm与LMA的全球数据集