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Photosynthetic response of early and late leaves of white birch (Betula platyphylla var. japonica) grown under free-air ozone exposure

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/54044

Title: Photosynthetic response of early and late leaves of white birch (Betula platyphylla var. japonica) grown under free-air ozone exposure
Authors: Hoshika, Yasutomo Browse this author →KAKEN DB
Watanabe, Makoto Browse this author →KAKEN DB
Inada, Naoki Browse this author
Mao, Qiaozhi Browse this author
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Tropospheric ozone
White birch (Betula platyphylla var. japonica)
Heterophyll
Photosynthesis
Issue Date: Nov-2013
Publisher: Elsevier sci ltd
Journal Title: Environmental pollution
Volume: 182
Start Page: 242
End Page: 247
Publisher DOI: 10.1016/j.envpol.2013.07.033
PMID: 23938447
Abstract: Betula platyphylla var.japonica (white birch) has heterophyllous leaves (i.e., early and late leaves) and is a typical pioneer tree species in northern Japan. Seedlings of white birch were exposed to ozone during two growing seasons, and measurements were carried out in the second year. Early leaves did not show an ozone-induced reduction in photosynthesis because of lower stomatal conductance resulting in higher avoidance capacity for ozone-induced stress. Also, an ozone-related increase in leaf nitrogen content may partly contribute to maintain the photosynthetic capacity in early leaves under elevated ozone in autumn. On the other hand, late leaves showed an ozone-induced decline of photosynthesis and early defoliation of leaves occurred. Also, smaller leaf size and higher stomatal density in late leaves were observed under elevated ozone. Differences in stress resistance to ozone may be related to differing functional roles of early and late leaves for birch species. (C) 2013 Elsevier Ltd. All rights reserved.
Type: article (author version)
URI: http://hdl.handle.net/2115/54044
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)

Submitter: 星加 康智

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