Individual and Interactive Effects of Elevated Ozone and Temperature on Plant Responses
2022
Lee, Jong Kyu | Kwak, Myeong Ja | Jeong, Su Gyeong | Woo, Su Young
From the preindustrial era to the present day, the tropospheric ozone (O₃) concentration has increased dramatically in much of the industrialized world due to anthropogenic activities. O₃ is the most harmful air pollutant to plants. Global surface temperatures are expected to increase with rising O₃ concentration. Plants are directly affected by temperature and O₃. Elevated O₃ can impair physiological processes, as well as cause the accumulation of reactive oxygen species (ROS), leading to decreased plant growth. Temperature is another important factor influencing plant development. Here, we summarize how O₃ and temperature elevation can affect plant physiological and biochemical characteristics, and discuss results from studies investigating plant responses to these factors. In this review, we focused on the interactions between elevated O₃ and temperature on plant responses, because neither factor acts independently. Temperature has great potential to significantly influence stomatal movement and O₃ uptake. For this reason, the combined influence of both factors can yield significantly different results than those of a single factor. Plant responses to the combined effects of elevated temperature and O₃ are still controversial. We attribute the substantial uncertainty of these combined effects primarily to differences in methodological approaches.
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