基于定量化植物防御效应的臭氧通量模型的优化

继SUM06、AOT40之后，基于气孔臭氧累计吸收通量（AFstY）的研究方法被广泛应用于臭氧风险评估中.然而通量模型中的阈值Y并不能很好地代表植物对臭氧的抗氧化能力以及自我修复能力，如何动态模拟植物自身的防御机制对于提高臭氧风险评估的准确性尤为重要.本文基于前人的研究成果探讨如何定量化植物对臭氧的防御效应，运用光合定量方法动态模拟伤害阈值并计算臭氧有效吸收通量，运用SODA模型从气孔吸收和质外体解毒两个方面探讨细胞内抗坏血酸对臭氧原生质膜通量的影响，旨在为臭氧通量模型研究开辟一个新的视角，并为后续的臭氧胁迫效应研究打下基础.

Ozone flux model optimization based on quantification of plant defense effect

After SUM06 and AOT40,the cumulative stomatal ozone uptake fluxes (AFstY) methods have been widely used in ozone risk assessment.But the threshold Y of the flux model cannot well reflect plant''s antioxidant ability and self-repair ability to ozone exposure.How to dynamically simulate the plant''s own defense mechanisms is particularly important to improve the accuracy of ozone risk assessment.This article discusses how to quantify the plant''s defense against ozone based on measurement results of other researchers.The photosynthetic quantitative method is used to simulate the damage threshold dynamically and calculate the effective uptake fluxes of ozone.The SODA model is used to discuss the effect of ascorbic acid in the cell to the plasma membrane flux of ozone from two aspects of stomatal absorption and apoplast detoxification.The results provide a new perspective for ozone flux model,and lay the foundation for ozone stress effect research.