Phosphorus and cadmium interactions in Kandelia obovata (S. L.) in relation to cadmium tolerance
Phosphorus and cadmium interactions in Kandelia obovata (S. L.) in relation to cadmium tolerance
复制标题
秋茄 (S. L.) 中磷和镉的相互作用与镉耐受性的关系
DOI：
10.1007/s11356-013-1910-8
复制
发表时间：
2013
影响因子：
5.8
通讯作者：
Li, Zhaodeng
中科院分区：
文献类型：
--
作者：
Du, Jingna;Yan, Chongling;Li, Zhaodeng
本研究旨在探讨外源磷是否能缓解潮间带红树林对镉（Cd）的耐性。在不同镉、磷浓度条件下，在根箱中栽培黄花坎大兰（Kandelia obovata）。采用序贯提取方法研究了Cd在根际和非根际沉积物中的形态分布；采用高效液相色谱法测定植物组织和土壤溶液中的有机酸；测定了Cd和P在植株中的累积量。结果表明，Cd在根际和非根际沉积物中的形态分布存在较大差异。根系活性影响Cd动态，施磷增加了根组织有机酸含量，增加了Cd在根内的积累，降低了Cd从根向地上组织的转运，Cd与P在根内呈显著正相关（r = 0.905）。研究认为，在根组织中磷和有机酸含量较高的情况下，黄曲霉的Cd解毒作用与高Cd固定化有关。
This study focused on the cadmium (Cd) tolerance of mangroves with application of phosphate (P) in order to explore whether exogenous P can alleviate Cd stress on these intertidal species. Kandelia obovata (S. L.) seedlings were cultivated in rhizoboxes under different levels of Cd and P concentrations. The speciation distributions of Cd in the rhizosphere and non-rhizosphere sediments were examined by sequential extraction procedures; organic acid in plant tissues and soil solution was measured by high-performance liquid chromatography; Cd and P accumulation in the plants was also determined. Results showed that considerable differences existed in Cd speciation distributions between rhizosphere and non-rhizosphere sediments. Root activity influenced the dynamics of Cd, P application increased the organic acid content in root tissues, P also increased Cd accumulation in roots whilst lowering Cd translocation from root to the above-ground tissues, and a significant positive correlation was found between Cd and P in roots (r = 0.905). It is postulated that Cd detoxification of K. obovata (S. L.) is associated with higher Cd immobilization in the presence of higher P and organic acid contents in root tissue.
登录
查看更多内容
DOI：
--
发表时间：
1989-12
期刊：
--
影响因子：
--
作者：
A. J. Shaw
通讯作者：
A. J. Shaw
DOI：
10.1002/047086303x
发表时间：
2004-03
期刊：
--
影响因子：
--
作者：
G. Kirk
通讯作者：
G. Kirk
影响因子：
2.4
作者：
Sally Brown;R. Chaney;J. Hallfrisch;J. A. Ryan;W. R. Berti
通讯作者：
Sally Brown;R. Chaney;J. Hallfrisch;J. A. Ryan;W. R. Berti
DOI：
10.1007/s00128-006-0981-3
发表时间：
2006-04
影响因子：
2.7
作者：
C. P. Liu;Z. Shen;X. Li
通讯作者：
C. P. Liu;Z. Shen;X. Li
影响因子：
1.9
作者：
Nedjimi, Bouzid;Daoud, Youcef
通讯作者：
Daoud, Youcef