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学科主题: Forestry
题名: Metal (Pb, Zn and Cu) uptake and tolerance by mangroves in relation to root anatomy and lignification/suberization
作者: Cheng, H ; Jiang, ZY ; Liu, Y ; Ye, ZH ; Wu, ML ; Sun, CC ; Sun, FL ; Fei, J ; Wang, YS
通讯作者: yswang@scsio.ac.cn
关键词: exodermis ; heavy metals ; mangrove plants
刊名: TREE PHYSIOLOGY
发表日期: 2014
卷: 34, 期:6, 页:646-656
收录类别: sci
部门归属: [Cheng, Hao ; Jiang, Zhao-Yu ; Wu, Mei-Lin ; Sun, Cui-Ci ; Sun, Fu-Lin ; Fei, Jiao ; Wang, You-Shao] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Cheng, Hao ; Jiang, Zhao-Yu ; Wu, Mei-Lin ; Sun, Cui-Ci ; Sun, Fu-Lin ; Fei, Jiao ; Wang, You-Shao] Chinese Acad Sci, South China Sea Inst Oceanol, Daya Bay Marine Biol Res Stn, Guangzhou 510301, Guangdong, Peoples R China ; [Liu, Yong] Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab Exploitat & Utilizat Marine Fisheries Res, Minist Agr, Guangzhou 510300, Guangdong, Peoples R China ; [Ye, Zhi-Hong] Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510006, Guangdong, Peoples R China
项目归属: LTO
资助者: National Natural Science Foundation of China [41106103, 41076070, 41176101]; specialized Research Fund for the Doctoral Program of Higher Education of China [20100171110035]; Fund of Key Laboratory for Exploitation & Utilization of Marine Fisheries Resource in South China Sea, Ministry of Agriculture [LSF2013-5]; National Science & Technology Pillar Program in the Eleventh Five-year Plan Period [2012BAC07B0402]
摘要: Metal pollution has been widely reported in mangrove wetlands; however, the mechanisms involved in metal detoxification by mangroves are still poorly understood. This study aimed to investigate the possible function of root anatomy and lignification/suberization on metal uptake and tolerance in seedlings of six species of mangroves. The results revealed that the three rhizophoraceous species (Bruguiera gymnorrhiza (L.) Poir, Kandelia obovata Sheue, Liu & Yong and Rhizophora stylosa Griff) consistently exhibited higher metal tolerances than the three pioneer species (Aegiceras corniculatum (Linn.) Blanco, Acanthus ilicifolius L. and Avicennia marina (Forsk.) Viern.). Moreover, metal-tolerant species often exhibited a thick exodermis with high lignification and suberization. The tolerance indices of the mangroves were found to be positively correlated with the amounts of lignin and suberin deposition within the exodermal cell walls. The observed metal uptake by the excised roots further illustrated that a lignified/suberized exodermis directly delayed the entry of metals into the roots, and thereby contributed to a higher tolerance to heavy metals. In summary, the present study proposes a barrier property of the lignified/suberized exodermis in dealing with the stresses of heavy metals, such that the mangroves which possessed more extensive lignification/suberization within the exodermis appeared to exhibit higher metal tolerance.
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WOS记录号: WOS:000339722900009
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10544
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Cheng, H; Jiang, ZY; Liu, Y; Ye, ZH; Wu, ML; Sun, CC; Sun, FL; Fei, J; Wang, YS.Metal (Pb, Zn and Cu) uptake and tolerance by mangroves in relation to root anatomy and lignification/suberization,TREE PHYSIOLOGY,2014,34(6):646-656
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