Effects of ozone on maize (Zea mays L.) photosynthetic physiology, biomass and yield components based on exposure- and flux-response relationships
文献类型：期刊论文
| 作者 | Peng, Jinlong; Shang, Bo; Xu, Yansen ; Feng, Zhaozhong; Calatayud, Vicent
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| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2020-01 |
| 卷号 | 256页码:1-10 |
| 关键词 | Maize Ozone sensitivity Flux-response relationships Critical levels Developmental stages |
| ISSN号 | 0269-7491 |
| 英文摘要 | Since the Industrial Revolution, the global ambient O-3 concentration has more than doubled. Negative impact of O-3 on some common crops such as wheat and soybeans has been widely recognized, but there is relatively little information about maize, the typical C4 plant and third most important crop worldwide. To partly compensate this knowledge gap, the maize cultivar (Zhengdan 958, ZD958) with maximum planting area in China was exposed to a range of chronic ozone (O-3) exposures in open top chambers (OTCs). The O-3 effects on this highly important crop were estimated in relation to two O-3 metrics, AOT40 (accumulated hourly O-3 concentration over a threshold of 40 ppb during daylight hours) and POD6 (Phytotoxic O-3 Dose above a threshold flux of 6 nmol O-3 m(-2) s(-1) during a specified period). We found that (1) the reduced light-saturated net photosynthetic rate (A(sat)) mainly caused by non-stomatal limitations across heading and grain filling stages, but the stomatal limitations at the former stage were stronger than those at the latter stage; (2) impact of O-3 on water use efficiency (WUE) of maize was significantly dependent on developmental stage; (3) yield loss induced by O-3 was mainly due to a reduction in kernels weight rather than in the number of kernels; (4) the performance of AOT40 and POD6 was similar, according to their determination coefficients (R-2); (5) the order of O-3 sensitivity among different parameters was photosynthetic parameters > biomass parameters > yield-related parameters; (6) Responses of A(sat) to O-3 between heading and gran filling stages were significantly different based on AOT40 metric, but not POD6. The proposed O-3 metrics-response relationships will be valuable for O-3 risk assessment in Asia and also for crop productivity models including the influence of O-3. (C) 2019 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44294]  |
| 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 | Peng, Jinlong,Shang, Bo,Xu, Yansen,et al. Effects of ozone on maize (Zea mays L.) photosynthetic physiology, biomass and yield components based on exposure- and flux-response relationships[J]. ENVIRONMENTAL POLLUTION,2020,256:1-10. |
| APA | Peng, Jinlong,Shang, Bo,Xu, Yansen,Feng, Zhaozhong,&Calatayud, Vicent.(2020).Effects of ozone on maize (Zea mays L.) photosynthetic physiology, biomass and yield components based on exposure- and flux-response relationships.ENVIRONMENTAL POLLUTION,256,1-10. |
| MLA | Peng, Jinlong,et al."Effects of ozone on maize (Zea mays L.) photosynthetic physiology, biomass and yield components based on exposure- and flux-response relationships".ENVIRONMENTAL POLLUTION 256(2020):1-10. |
入库方式： OAI收割
来源：生态环境研究中心
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