期刊
ENVIRONMENTAL POLLUTION
卷 164, 期 -, 页码 110-117出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.01.034
关键词
Mangrove plants; Rhizophora stylosa; N deficiency; Salt; Metal accumulation/tolerance
资金
- National Natural Science Foundation of China [41076070, 41106103, 41176101]
- China Postdoctoral Science Foundation [20110490934]
- Chinese Academy of Sciences [kzcx2-yw-q07-02, kscx2-ew-g-12c, kscx2-yw-z-1024, kscx2-sw-132]
- key projects in the National Science and Technology Pillar Program [2009badb2b0606]
- National 908 project [908-02-04-04]
Effects of N deficiency and salinity on root anatomy, permeability and metal (Pb, Zn and Cu) translocation and tolerance were investigated using mangrove seedlings of Rhizophora stylosa. The results showed that salt could directly reduce radial oxygen loss (ROL) by stimulation of lignification within exodermis. N deficiency, oppositely, would reduce lignification. Such an alteration in root permeability may also influence metal tolerance by plants. The data indicated that a moderate salinity could stimulate a lignified exodermis that delayed the entry of metals into the roots and thereby contributed to a higher metal tolerance, while N deficiency would aggravate metal toxicity. The results from sand pot trail further confirmed this issue. This study provides a barrier property of the exodermis in dealing with environments. The plasticity of root anatomy is likely an adaptive strategy to regulate the fluxes of gases, nutrients and toxins at root soil interface. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据