Phosphorus acquisition strategy of Vallisneria natans in sediment based on in situ imaging techniques
文献类型：期刊论文
| 作者 | Zhang, Yi; Li, Cai; Sun, Qin; Jiang, Cuiling; Ding, Shiming; Chen, Musong; Ma, Xin; Zhong, Zhilin; Wang, Yan; Tsang, Daniel C. W. |
| 刊名 | ENVIRONMENTAL RESEARCH
 |
| 出版日期 | 2021 |
| 卷号 | 202 |
| 英文摘要 | Phosphorus (P) availability is closely related to the distributions of pH, O-2 and phosphatase activities in the rhizosphere of plants growing in soils and sediments. In this study, the P uptake processes and mechanisms of Vallisneria natans (V. natans) during two vegetation periods (i.e., week three and six) were revealed using three noninvasive 2D imaging techniques: planar optode (PO), diffusive gradients in thin films (DGT) and zymography. The results showed that increased phosphatase activity, O-2 concentration and root-induced acidification were observed together in the rhizosphere of root segments and tips. In week three, when V. natans was young, the flux of DGT-labile P accumulated more in the rhizosphere in comparison with the bulk sediment. This was because increased phosphatase activity (of up to 35%) and root-induced acidification (with pH decreasing by up to 0.25) enhanced P acquisition of V. natans by the third week. However, the flux of DGT-labile P turned to depletion during weeks three to six of V. natans growth, after Fe plaque formed at the matured stage. The constant hydrolysis of phosphatase and acidification could not compensate for the P demand of the roots by the sixth week. At this stage, Fe plaque become the P pool, due to P fixation with solid Fe(III) hydroxides. Subsequently, V. natans roots acquired P from Fe plaque via organic acid complexation of Fe(III). |
| 源URL | [http://159.226.73.51/handle/332005/20360]  |
| 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 | Zhang, Yi,Li, Cai,Sun, Qin,et al. Phosphorus acquisition strategy of Vallisneria natans in sediment based on in situ imaging techniques[J]. ENVIRONMENTAL RESEARCH,2021,202. |
| APA | Zhang, Yi.,Li, Cai.,Sun, Qin.,Jiang, Cuiling.,Ding, Shiming.,...&Tsang, Daniel C. W..(2021).Phosphorus acquisition strategy of Vallisneria natans in sediment based on in situ imaging techniques.ENVIRONMENTAL RESEARCH,202. |
| MLA | Zhang, Yi,et al."Phosphorus acquisition strategy of Vallisneria natans in sediment based on in situ imaging techniques".ENVIRONMENTAL RESEARCH 202(2021). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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