Summary Nonstructural carbohydrate (NSC) concentrations might reflect the strategies described in the leaf economic spectrum (LES) due to their dependence on photosynthesis and respiration. We examined if NSC concentrations correlate with leaf structure, chemistry, and physiology traits for 114 species from 19 sites and 5 biomes around the globe. Total leaf NSC concentrations varied greatly from 16 to 199 mg g−1 dry mass and were mostly independent of leaf gas exchange and the LES traits. By contrast, leaf NSC residence time was shorter in species with higher rates of photosynthesis, following the fast‐slow strategies in the LES. An average leaf held an amount of NSCs that could sustain one night of leaf respiration and could be replenished in just a few hours of photosynthesis under saturating light, indicating that most daily carbon gain is exported. Our results suggest that NSC export is clearly linked to the economics of return on resource investment.

中文翻译：

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叶片非结构性碳水化合物停留时间，而不是浓度，与木本植物叶片经济谱的叶片功能性状相关


摘要 非结构性碳水化合物 （NSC） 浓度可能反映了叶片经济谱 （LES） 中描述的策略，因为它们依赖于光合作用和呼吸作用。我们检查了 NSC 浓度是否与来自全球 19 个地点和 5 个生物群落的 114 个物种的叶片结构、化学和生理学特征相关。叶片总 NSC 浓度在 16 至 199 mg g-1 干质量范围内变化很大，并且大多与叶片气体交换和 LES 性状无关。相比之下，在光合作用速率较高的物种中，叶片 NSC 停留时间较短，遵循 LES 中的快慢策略。一片叶子平均含有一定量的 NSC，可以维持一夜的叶子呼吸，并且可以在饱和光下仅几个小时的光合作用中补充，这表明每天的大部分碳增益都是输出的。我们的结果表明，NSC 出口与资源投资回报经济学明显相关。