• Tolerance of abiotic stress in woody plants is known to be constrained by biological trade‐offs between different forms of stress, especially shade and drought. However, there is still considerable uncertainty on the relationship between tolerances and the limits on tolerance combinations.
• Using the most extensive database available on shade, drought, waterlogging and cold tolerance for 799 northern hemisphere woody species, we determined the number of dimensions needed to summarise their tolerance combinations, and the best trade‐off model among those currently available, for description of the interdependence between tolerances.
• Two principal component analysis (PCA) dimensions summarised stress tolerance combinations. They defined a triangular stress tolerance space (STS). The first STS dimension reflected segregation between drought‐tolerant and waterlogging‐tolerant species. The second reflected shade tolerance, which is independent of the other tolerances. Cold tolerance scaled weakly with both dimensions. Tolerance combinations across the species in the database were limited by boundary‐line trade‐offs.
• The STS reconciles all major theories about trade‐offs between abiotic stress tolerances, providing a unified trade‐off model and a set of coordinates that can be used to examine how other aspects of plant biology, such as plant functional traits, change within the limits of abiotic stress tolerance.

中文翻译：

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木本植物非生物胁迫耐受性的三角空间：一个统一的权衡模型

• 已知木本植物中非生物胁迫的耐受性受到不同形式的胁迫（尤其是阴凉和干旱）之间生物平衡的限制。但是，公差与公差组合的极限之间的关系仍然存在很大的不确定性。
• 使用关于799个北半球木本物种的阴凉，干旱，涝渍和寒冷耐受性的最广泛的数据库，我们确定了概括其耐受性组合所需的维数，并确定了当前可用的最佳折衷模型，以描述公差之间的相互依赖性。
• 两个主成分分析（PCA）维度总结了耐压组合。他们定义了一个三角形应力承受空间（STS）。STS的第一个维度反映了耐旱物种和耐涝物种之间的隔离。第二个反射阴影容差与其他容差无关。耐寒性在两个维度上均微弱地缩放。数据库中各物种的耐受性组合受到边界线折衷的限制。
• STS协调了有关非生物胁迫耐受性之间权衡的所有主要理论，提供了一个统一的权衡模型和一组坐标，这些坐标可用于检查植物生物学的其他方面（例如植物功能性状）如何在限制范围内变化非生物胁迫耐受性。