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学科主题: Plant Sciences
题名: Interactions among Fe2+, S2-, and Zn2+ tolerance, root anatomy, and radial oxygen loss in mangrove plants
作者: Cheng, H ; Chen, DT ; Tam, NFY ; Chen, GZ ; Li, SY ; Ye, ZH
通讯作者: lssyzhh@mail.sysu.edu.cn
关键词: apoplasmic barrier ; co-tolerance ; mangrove ; radial oxygen loss ; root anatomy
刊名: JOURNAL OF EXPERIMENTAL BOTANY
发表日期: 2012
卷: 63, 期:7, 页:2619-2630
部门归属: [Cheng, Hao; Chen, Dan-Ting; Ye, Zhi-Hong] Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol & Guangdong Key Lab Plan, Guangzhou 510006, Guangdong, Peoples R China; [Cheng, Hao] Chinese Acad Sci, S China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Tam, Nora Fung-Yee] City Univ Hong Kong, Dept Biol & Chem, Hong Kong, Hong Kong, Peoples R China; [Chen, Gui-Zhu; Li, Shi-Yu] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
项目归属: LTO
摘要: Root anatomy, radial oxygen loss (ROL), and tolerances to ferrous (Fe2+), sulphide (S2-), and zinc (Zn2+) ions were investigated in seedlings of eight species of mangrove, including three pioneer species, three rhizophoraceous and two landward semi-mangrove species. The results showed an interesting co-tolerance to Fe2+, S2-, and Zn2+. The three rhizophoraceous species (Bruguiera gymnorrhiza, Kandelia obovata and Rhizophora stylosa), which possessed the thickest lignified exodermis and the 'tightest barrier' in ROL spatial pattern, consistently exhibited the highest tolerance to Fe2+, S2-, and Zn2+. B. gymnorrhiza could directly reduce ROL by increasing lignification within the exodermis. Such an induced barrier to ROL is a probable defence response to prevent further invasion and spread of toxins within plants. The data also indicated that, in B. gymnorrhiza, Fe2+ or S2-, or both, induced a lignified exodermis that delayed the entry of Zn2+ into the roots and thereby contributed to a higher tolerance to Zn2+. This study provides new evidence of exclusive strategies of mangrove seedling roots in dealing with contaminations. The information is also important in the selection and cultivation of tolerant species for the bioremediation of contaminated waters or soils.
语种: 英语
WOS记录号: WOS:000304052300019
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10187
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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Recommended Citation:
Cheng, H; Chen, DT; Tam, NFY; Chen, GZ; Li, SY; Ye, ZH.Interactions among Fe2+, S2-, and Zn2+ tolerance, root anatomy, and radial oxygen loss in mangrove plants,JOURNAL OF EXPERIMENTAL BOTANY,2012,63(7):2619-2630
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