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Graduate School of Agriculture / Faculty of Agriculture >
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Effects of ozone-induced stomatal closure on ozone uptake and its changes due to leaf age in sun and shade leaves of Siebold's beech
| Title: | Effects of ozone-induced stomatal closure on ozone uptake and its changes due to leaf age in sun and shade leaves of Siebold's beech |
| Authors: | Hoshika, Yasutomo Browse this author →KAKEN DB | | Watanabe, Makoto Browse this author →KAKEN DB | | Inada, Naoki Browse this author | | Koike, Takayoshi Browse this author →KAKEN DB |
| Keywords: | Free-air ozone exposure | | Siebold's beech | | Stomatal conductance model | | Stomatal ozone uptake | | Sun and shade leaves |
| Issue Date: | Sep-2015 |
| Publisher: | 日本農業気象学会 |
| Journal Title: | Journal of agricultural meteorology |
| Volume: | 71 |
| Issue: | 3 |
| Start Page: | 218 |
| End Page: | 226 |
| Publisher DOI: | 10.2480/agrmet.D-14-00013 |
| Abstract: | An estimation of stomatal ozone uptake for the assessment of ozone risks in forest trees can be modified by ozone-induced stomatal closure. We thus examined a seasonal course of stomatal conductance in sun and shade leaves of Siebold's beech native to northern Japan (Fagus crenata) grown under free-air ozone exposure. A performance of multiplicative stomatal conductance model was also tested, when considering ozone-induced stomatal closure into the model. Ozone caused stomatal closure in both sun and shade leaves (20% and 30-40% reduction of stomatal conductance in sun and shade leaves, respectively) during early summer. However, in autumn, stomatal closure was diminished regardless of canopy positions (approximately 7% and 6% reduction of stomatal conductance in sun and shade leaves, respectively). When observed seasonal course of stomatal closure was taken into account in stomatal conductance model, the model provided a good agreement with measurements even under conditions of elevated ozone. As a result, ozone-induced stomatal closure limited stomatal ozone uptake by 11% and 17% in sun and shade leaves of Siebold's beech, respectively. In addition, stomatal ozone uptake in shade leaves under elevated ozone was much less than that in sun leaves (35% of the value in sun leaves), indicating better avoidance of ozone stress in shade leaves. Our results suggest that a loss of ozone-induced stomatal closure after ozone exposure in the late growing season should be considered in modeling stomatal ozone uptake for the assessment of ozone impacts on Siebold's beech. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/60222 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 小池 孝良
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