Tropospheric ozone (O₃) is among the most damaging air pollutant to plants. Plants alter the atmospheric O₃ concentration in two distinct ways: (i) by the emission of volatile organic compounds (VOCs) that are precursors of O_3; and (ii) by dry deposition, which includes diffusion of O₃ into vegetation through stomata and destruction by nonstomatal pathways. Isoprene, monoterpenes, and higher terpenoids are emitted by plants in quantities that alter tropospheric O₃. Deposition of O₃ into vegetation is related to stomatal conductance, leaf structural traits, and the detoxification capacity of the apoplast. The biochemical fate of O₃ once it enters leaves and reacts with aqueous surfaces is largely unknown, but new techniques for the tracking and identification of initial products have the potential to open the black box.

对流层臭氧 (O ₃ ) 是对植物最具破坏性的空气污染物之一。植物以两种不同的方式改变大气中的 O ₃浓度：(i) 通过排放作为 O 3 前体的挥发性有机化合物 (VOC) _；(ii) 干沉降，包括O ₃通过气孔扩散到植被中和被非气孔途径破坏。植物释放的异戊二烯、单萜和高级萜类化合物的数量会改变对流层 O ₃。_{O 3}在植被中的沉积与气孔导度、叶片结构性状和质外体的解毒能力有关。_{O 3}的生化命运一旦它进入叶子并与水表面发生反应在很大程度上是未知的，但用于跟踪和识别初始产品的新技术有可能打开黑匣子。