Ethylenediurea (EDU) effects on hybrid larch saplings exposed to ambient or elevated ozone over three growing seasons
文献类型：期刊论文
| 作者 | Agathokleous, Evgenios; Kitao, Mitsutoshi; Koike, Takayoshi |
| 刊名 | JOURNAL OF FORESTRY RESEARCH
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| 页码 | - |
| 关键词 | Air pollution Ethylenediurea (EDU) Hormesis Plant protection Tropospheric ozone (o(3)) Larix gmelinii var. japonica x L. kaempferi |
| ISSN号 | 1007-662X |
| 英文摘要 | Ground-level ozone (O-3) pollution is a persistent environmental issue that can lead to adverse effects on trees and wood production, thus indicating a need for forestry interventions to mediate O-3 effects. We treated hybrid larch (Larix gmelinii var. japonica x L. kaempferi) saplings grown in nutrient-poor soils with 0 or 400 mg L-1 water solutions of the antiozonant ethylenediurea (EDU0, EDU400) and exposed them to ambient O-3 (AOZ; 08:00 - 18:00 approximate to 30 nmol mol(-1)) or elevated O-3 (EOZ; 08:00 - 18:00 approximate to 60 nmol mol(-1)) over three growing seasons. We found that EDU400 protected saplings against most effects of EOZ, which included extensive visible foliar injury, premature senescence, decreased photosynthetic pigment contents and altered balance between pigments, suppressed gas exchange and biomass production, and impaired leaf litter decay. While EOZ had limited effects on plant growth (suppressed stem diameter), it decreased the total number of buds per plant, an effect that was not observed in the first growing season. These results indicate that responses to EOZ might have implications to plant competitiveness, in the long term, as a result of decreased potential for vegetative growth. However, when buds were standardized per unit of branches biomass, EOZ significantly increased the number of buds per unit of biomass, suggesting a potentially increased investment to bud development, in an effort to enhance growth potential and competitiveness in the next growing season. EDU400 minimized most of these effects of EOZ, significantly enhancing plant health under O-3-induced stress. The effect of EDU was attributed mainly to a biochemical mode of action. Therefore, hybrid larch, which is superior to its parents, can be significantly improved by EDU under long-term elevated O-3 exposure, providing a perspective for enhancing afforestation practices. |
| WOS研究方向 | Forestry |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45467]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol NUIST, Sch Appl Meteorol, Key Lab Agrometeorol Jiangsu Prov, Nanjing 210044, Peoples R China 2.Hokkaido Univ, Res Fac Agr, Sapporo, Hokkaido 0608589, Japan 3.Forestry & Forest Prod Res Inst FFPRI, Hokkaido Res Ctr, Sapporo, Hokkaido 0628516, Japan 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Agathokleous, Evgenios,Kitao, Mitsutoshi,Koike, Takayoshi. Ethylenediurea (EDU) effects on hybrid larch saplings exposed to ambient or elevated ozone over three growing seasons[J]. JOURNAL OF FORESTRY RESEARCH:-. |
| APA | Agathokleous, Evgenios,Kitao, Mitsutoshi,&Koike, Takayoshi. |
| MLA | Agathokleous, Evgenios,et al."Ethylenediurea (EDU) effects on hybrid larch saplings exposed to ambient or elevated ozone over three growing seasons".JOURNAL OF FORESTRY RESEARCH |
入库方式： OAI收割
来源：生态环境研究中心
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