Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures
文献类型：期刊论文
| 作者 | Niu, Zhenchuan ; Zhang, Xiaoshan ; Wang, Sen ; Zeng, Ming ; Wang, Zhangwei ; Zhang, Yi ; Ci, Zhijia |
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 出版日期 | 2014 |
| 卷号 | 21期号:2页码:1541-1547 |
| 关键词 | Mercury Gas exchange parameters Proline Malondialdehyde Open-top chamber |
| ISSN号 | 0944-1344 |
| 中文摘要 | Thousands of tons of mercury (Hg) are released from anthropogenic and natural sources to the atmosphere in a gaseous elemental form per year, yet little is known regarding the influence of airborne Hg on the physiological activities of plant leaves. In the present study, the effects of low-level air and soil Hg exposures on the gas exchange parameters of maize (Zea mays L.) leaves and their accumulation of Hg, proline, and malondialdehyde (MDA) were examined via field open-top chamber and Hg-enriched soil experiments, respectively. Low-level air Hg exposures (< 50 ng m(-3)) had little effects on the gas exchange parameters of maize leaves during most of the daytime (p > 0.05). However, both the net photosynthesis rate and carboxylation efficiency of maize leaves exposed to 50 ng m(-3) air Hg were significantly lower than those exposed to 2 ng m(-3) air Hg in late morning (p < 0.05). Additionally, the Hg, proline, and MDA concentrations in maize leaves exposed to 20 and 50 ng m(-3) air Hg were significantly higher than those exposed to 2 ng m(-3) air Hg (p < 0.05). These results indicated that the increase in airborne Hg potentially damaged functional photosynthetic apparatus in plant leaves, inducing free proline accumulation and membrane lipid peroxidation. Due to minor translocation of soil Hg to the leaves, low-level soil Hg exposures (< 1,000 ng g(-1)) had no significant influences on the gas exchange parameters, or the Hg, proline, and MDA concentrations in maize leaves (p > 0.05). Compared to soil Hg, airborne Hg easily caused physiological stress to plant leaves. The effects of increasing atmospheric Hg concentration on plant physiology should be of concern. |
| WOS记录号 | WOS:000329243700071 |
| 公开日期 | 2015-03-23 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9257]  |
| 专题 | 生态环境研究中心_大气环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Niu, Zhenchuan,Zhang, Xiaoshan,Wang, Sen,et al. Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2014,21(2):1541-1547. |
| APA | Niu, Zhenchuan.,Zhang, Xiaoshan.,Wang, Sen.,Zeng, Ming.,Wang, Zhangwei.,...&Ci, Zhijia.(2014).Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,21(2),1541-1547. |
| MLA | Niu, Zhenchuan,et al."Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 21.2(2014):1541-1547. |
入库方式： OAI收割
来源：生态环境研究中心
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