The role of radial oxygen loss and root anatomy on zinc uptake and tolerance in mangrove seedlings
Cheng, H; Liu, Y; Tam, NFY; Wang, X; Li, SY; Chen, GZ; Ye, ZH; Issyzhh@mail.sysu.edu.cn
2010
发表期刊ENVIRONMENTAL POLLUTION
ISSN0269-7491
卷号158期号:5页码:1189-1196
摘要Root anatomy, radial oxygen loss (ROL) and zinc (Zn) uptake and tolerance in mangrove plants were investigated using seedlings of Aegiceras corniculatum, Bruguiera gymnorrhiza and Rhizophora stylosa. The results revealed that B. gymnorrhiza, which possessed the 'tightest barrier' in ROL spatial patterns among the three species studied, took up the least Zn and showed the highest Zn tolerance. Furthermore, zinc significantly decreased the ROL of all three plants by inhibition of root permeability, which included an obvious thickening of outer cortex and significant increases of lignification in cell walls. The results of SEM X-ray microanalysis further confirmed that such an inducible, low permeability of roots was likely an adaptive strategy to metal stress by direct prevention of excessive Zn entering into the root. The present study proposes new evidence of structural adaptive strategy on metal tolerance by mangrove seedlings. (C) 2010 Elsevier Ltd. All rights reserved.
部门归属[Cheng, H.; Wang, X.; Ye, Z. H.] Sun Yat Sen Univ, State Key Lab Biocontrol, Guangzhou 510006, Guangdong, Peoples R China; [Cheng, H.; Wang, X.; Ye, Z. H.] Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510006, Guangdong, Peoples R China; [Liu, Y.] Chinese Acad Fishery Sci, Minist Agr, Key Lab Mariculture Ecol & Prod Qual & Safety, S China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China; [Tam, N. F. Y.] City Univ Hong Kong, Dept Biol & Chem, Hong Kong, Hong Kong, Peoples R China; [Li, S. Y.; Chen, G. Z.] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
关键词Radial Oxygen Loss Root Anatomy Sem X-ray Microanalysis Heavy Metals Mangrove Plants
学科领域Environmental Sciences
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收录类别sci
资助项目LED
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/6301
专题热带海洋环境国家重点实验室(LTO)
通讯作者Issyzhh@mail.sysu.edu.cn
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Cheng, H,Liu, Y,Tam, NFY,et al. The role of radial oxygen loss and root anatomy on zinc uptake and tolerance in mangrove seedlings[J]. ENVIRONMENTAL POLLUTION,2010,158(5):1189-1196.
APA Cheng, H.,Liu, Y.,Tam, NFY.,Wang, X.,Li, SY.,...&Issyzhh@mail.sysu.edu.cn.(2010).The role of radial oxygen loss and root anatomy on zinc uptake and tolerance in mangrove seedlings.ENVIRONMENTAL POLLUTION,158(5),1189-1196.
MLA Cheng, H,et al."The role of radial oxygen loss and root anatomy on zinc uptake and tolerance in mangrove seedlings".ENVIRONMENTAL POLLUTION 158.5(2010):1189-1196.
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