Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6317523 | Environmental Pollution | 2014 | 9 Pages |
Abstract
To evaluate the negative impact of ozone (O3) on Japanese crop plant yield based on cumulative stomatal O3 flux, a Japanese rice cultivar, Koshihikari, was exposed to O3 in O3-exposure chambers. Stomatal diffusive conductance to water vapour were measured during the experimental period. We parameterized and improved a stomatal diffusive conductance model by considering seasonal changes in stomatal diffusive conductance, as well as the acute effects of O3 on this variable. Our adjusted model accounted for 64% of the variation within the data set. Based on the results of linear regression analyses of the relationship between relative yield and cumulative O3 uptake, the negative impact of O3 on the yield of Koshihikari can be evaluated using cumulative O3 uptake with a threshold of 10 nmol O3 mâ2 projected leaf area sâ1 and an integration period of â300 to 100 °C days from anthesis.
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Authors
Masahiro Yamaguchi, Daiki Hoshino, Hidetoshi Inada, Nahid Akhtar, Chika Sumioka, Kenta Takeda, Takeshi Izuta,