O-2 distribution and dynamics in the rhizosphere of Phragmites australis, and implications for nutrient removal in sediments
文献类型：期刊论文
| 作者 | Li, Cai; Ding, Shiming; Ma, Xin; Chen, Musong; Zhong, Zhilin; Zhang, Yi; Ren, Mingyi; Zhang, Min; Yang, Liyuan; Rong, Nan |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2021 |
| 卷号 | 287 |
| 英文摘要 | Root-triggered microscale variations in O-2 distribution in the rhizosphere of young Phragmites australis are important for nutrient removal in sediments. In this study, the micro-scale O-2 dynamics and the small-scale changes of soluble reactive phosphorus (SRP) and ammonium (NH4+) in the rhizosphere of P. australis were investigated using planar optodes and high-resolution dialysis (HR-Peeper), respectively. Results suggested that root O-2 leakage has a highly variable distribution depending on the stage of root growth, the site of O-2 leakage gradually shift from the entire emerging main roots to the main root tip and subsequently shifted the emerging lateral roots. The O-2 concentration increased in the rhizosphere with increasing light intensity and O-2 levels in the overlying water. Continuous O-2 release from the lateral roots causes the formation of iron plaque on the surface of lateral roots, which reduce the mobility of P by adsorption of iron plaque in the rhizosphere. The oscillation of oxic-anoxic root zones improves nitrogen removal through the processes of anammox, hetemtmphic denitrification and nitrification. This work from the micro-scale demonstrates that the O-2 concentration is the spatio-temporal variations in the rhizosphere, and it presents an important role for nutrient removal in sediments. |
| 源URL | [http://159.226.73.51/handle/332005/20368]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Li, Cai,Ding, Shiming,Ma, Xin,et al. O-2 distribution and dynamics in the rhizosphere of Phragmites australis, and implications for nutrient removal in sediments[J]. ENVIRONMENTAL POLLUTION,2021,287. |
| APA | Li, Cai.,Ding, Shiming.,Ma, Xin.,Chen, Musong.,Zhong, Zhilin.,...&Wang, Yan.(2021).O-2 distribution and dynamics in the rhizosphere of Phragmites australis, and implications for nutrient removal in sediments.ENVIRONMENTAL POLLUTION,287. |
| MLA | Li, Cai,et al."O-2 distribution and dynamics in the rhizosphere of Phragmites australis, and implications for nutrient removal in sediments".ENVIRONMENTAL POLLUTION 287(2021). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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