Interaction of drought and ozone exposure on isoprene emission from extensively cultivated poplar
文献类型：期刊论文
| 作者 | Yuan, Xiangyang; Calatayud, Vicent; Gao, Feng; Fares, Silvano; Paoletti, Elena; Tian, Yuan; Feng, Zhaozhong |
| 刊名 | PLANT CELL AND ENVIRONMENT
 |
| 出版日期 | 2016-10 |
| 卷号 | 39期号:10页码:2276-2287 |
| 关键词 | climate change drought forests ground-level ozone isoprene emission leaf area photosynthesis poplar tropospheric O-3 |
| 英文摘要 | The combined effects of ozone (O-3) and drought on isoprene emission were studied for the first time. Young hybrid poplars (clone 546, Populus deltoides cv. 55/56 x P. deltoides cv. Imperial) were exposed to O-3 (charcoal-filtered air, CF, and non-filtered air +40 ppb, E-O-3) and soil water stress (well-watered, WW, and mild drought, MD, one-third irrigation) for 96 days. Consistent with light-saturated photosynthesis (Asat), intercellular CO2 concentration (Ci) and chlorophyll content, isoprene emission depended on drought, O-3, leaf position and sampling time. Drought stimulated emission (+38.4%), and O-3 decreased it (-40.4%). Ozone increased the carbon cost per unit of isoprene emission. Ozone and drought effects were stronger in middle leaves (13th-15th from the apex) than in upper leaves (6th-8th). Only Asat showed a significant interaction between O-3 and drought. When the responses were up-scaled to the entire-plant level, however, drought effects on total leaf area translated into around twice higher emission from WW plants in clean air than in E-O-3. Our results suggest that direct effects on plant emission rates and changes in total leaf area may affect isoprene emission from intensively cultivated hybrid poplar under combined MD and O-3 exposure, with important feedbacks for air quality. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35612]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yuan, Xiangyang,Calatayud, Vicent,Gao, Feng,et al. Interaction of drought and ozone exposure on isoprene emission from extensively cultivated poplar[J]. PLANT CELL AND ENVIRONMENT,2016,39(10):2276-2287. |
| APA | Yuan, Xiangyang.,Calatayud, Vicent.,Gao, Feng.,Fares, Silvano.,Paoletti, Elena.,...&Feng, Zhaozhong.(2016).Interaction of drought and ozone exposure on isoprene emission from extensively cultivated poplar.PLANT CELL AND ENVIRONMENT,39(10),2276-2287. |
| MLA | Yuan, Xiangyang,et al."Interaction of drought and ozone exposure on isoprene emission from extensively cultivated poplar".PLANT CELL AND ENVIRONMENT 39.10(2016):2276-2287. |
入库方式： OAI收割
来源：生态环境研究中心
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