SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Effects of copper on growth, radial oxygen loss and root permeability of seedlings of the mangroves Bruguiera gymnorrhiza and Rhizophora stylosa
Cheng, H; Tam, NFY; Wang, YS; Li, SY; Chen, GZ; Ye, ZH; lssyzhh@mail.sysu.edu.cn
2012
Source PublicationPLANT AND SOIL
ISSN0032-079X
Volume359Issue:41276Pages:255-266
AbstractMangrove wetlands have experienced significant contaminant input such as copper (Cu), aggravated by rapid urban development. This study aimed to investigate the possible function of root permeability in metal detoxification. Pot trials were conducted to evaluate the responses of root permeability in relation to metal (Cu) exposure in seedlings of two mangroves: Bruguiera gymnorrhiza and Rhizophora stylosa. Copper inhibited plant growth and root permeability of the two species significantly (due to decreases in root porosity, thickening of exodermis and increases in lignification), leading to a significant reduction in radial oxygen loss (ROL). A negative correlation between soil Cu and ROL from root tip was also observed. The observed metal uptake by excised roots further indicated that increased lignification would directly prevent excessive Cu from further entering into the roots. In summary, the two mangroves reacted to Cu by producing an impermeable barrier in roots. Such an inducible barrier to ROL is likely to be an adaptive strategy against Cu toxicity. This study reveals new evidence of a structural adaptive strategy for metal tolerance by mangrove plants.
Department[Cheng, Hao; Ye, Zhihong] Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510006, Guangdong, Peoples R China; [Cheng, Hao; Ye, Zhihong] Sun Yat Sen Univ, Sch Life Sci, Guangdong Key Lab Plant Resources, Guangzhou 510006, Guangdong, Peoples R China; [Cheng, Hao; Wang, Youshao] Chinese Acad Sci, S China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Cheng, Hao; Wang, Youshao] Chinese Acad Sci, S China Sea Inst Oceanol, Daya Bay Marine Biol Res Stn, Guangzhou 510301, Guangdong, Peoples R China; [Tam, Nora Fung-Yee] City Univ Hong Kong, Dept Biol & Chem, Hong Kong, Hong Kong, Peoples R China; [Li, Shiyu; Chen, Guizhu] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
KeywordHeavy Metal Mangrove Plant Radial Oxygen Loss Root Anatomy Root Porosity
Subject AreaAgronomy ; Plant Sciences ; Soil Science
Language英语
Funding ProjectLTO
WOS IDWOS:000308960800020
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/10103
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorlssyzhh@mail.sysu.edu.cn
Recommended Citation
GB/T 7714
Cheng, H,Tam, NFY,Wang, YS,et al. Effects of copper on growth, radial oxygen loss and root permeability of seedlings of the mangroves Bruguiera gymnorrhiza and Rhizophora stylosa[J]. PLANT AND SOIL,2012,359(41276):255-266.
APA Cheng, H.,Tam, NFY.,Wang, YS.,Li, SY.,Chen, GZ.,...&lssyzhh@mail.sysu.edu.cn.(2012).Effects of copper on growth, radial oxygen loss and root permeability of seedlings of the mangroves Bruguiera gymnorrhiza and Rhizophora stylosa.PLANT AND SOIL,359(41276),255-266.
MLA Cheng, H,et al."Effects of copper on growth, radial oxygen loss and root permeability of seedlings of the mangroves Bruguiera gymnorrhiza and Rhizophora stylosa".PLANT AND SOIL 359.41276(2012):255-266.
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