Diversity and characterization of Cd-tolerant dark septate endophytes (DSEs) associated with the roots of Nepal alder (Alnus nepalensis) in a metal mine tailing of southwest China
Xu,Runbing; Li,Tao; Cui,Hongliang; Wang,Junling; Yu,Xin; Ding,Yanhua; Wang,Chaojun; Yang,Zhuliang; Zhao,Zhiwei; Zhao,ZW (reprint author),Yunnan Univ,Minist Educ,Lab Conservat & Utilizat Bioresources,Key Lab Microbial Div Southwest China,Kunming 650091,Peoples R China.; zhaozhw@ynu.edu.cn
2015-09-01
发表期刊APPLIED SOIL ECOLOGY
卷号93页码:11-18
摘要Nepal alder (Alnus nepalensis), being an ideal and fast-growing pioneer species to accelerate ecological restoration of the degraded habitats in eastern Himalayas, have received extensive attention. In the present study, colonization characteristics, diversity and cadmium tolerance of dark septate endophytes (DSEs) colonizing the roots of Nepal alders were assessed along environmental gradients in a Pb, Zn, and Cd mine tailing, southwestern China. All Nepal alder roots surveyed were conspicuously colonized by DSEs with 23.1-35.8% colonization intensity. In total, 72 culturable strains of melanized root-associated fungi were isolated from the 45 root samples. Most strains were closely related to well-known DSE fungi, such as fungi belonging to the genera Phialophora, Leptodontidium, Cladosporium, and Exophiala. DSEs from heavily metal-polluted sites showed a higher Cd2+ tolerance in vitro than those from the slightly polluted plots. These findings stressed that DSE was an integral component of the root system of Nepal alder growing in metal-contaminated soils, and it is more feasible to obtain heavy metal (HM) tolerant DSEs from mining areas than from no HM-polluted environments for their potential application in phytoremediation. We concluded with a discussion of further research for addressing the unresolved roles of DSEs in A. nepalensis restoration during the early stage of plant establishment in the freshly metal-exposed mining soils. (C) 2015 Elsevier B.V. All rights reserved.
关键词Dark Septate Endophyte (Dse) Diversity Cd Tolerance Alnus Nepalensis
资助信息National Natural Science Foundation of China [31160009, 41161083, 31460114, 41461073]; Key Project of Applied Basic Research of Yunnan [2013FA001]; Young Academic and Technical Leader Raising Foundation of Yunnan Province [2012HB006]
学科领域Soil Science
DOI10.1016/j.apsoil.2015.03.013
收录类别SCI
语种英语
WOS研究方向Agriculture
WOS类目Soil Science
WOS记录号WOS:000354785300002
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/21150
专题中国科学院东亚植物多样性与生物地理学重点实验室
通讯作者Zhao,ZW (reprint author),Yunnan Univ,Minist Educ,Lab Conservat & Utilizat Bioresources,Key Lab Microbial Div Southwest China,Kunming 650091,Peoples R China.; zhaozhw@ynu.edu.cn
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Xu,Runbing,Li,Tao,Cui,Hongliang,et al. Diversity and characterization of Cd-tolerant dark septate endophytes (DSEs) associated with the roots of Nepal alder (Alnus nepalensis) in a metal mine tailing of southwest China[J]. APPLIED SOIL ECOLOGY,2015,93:11-18.
APA Xu,Runbing.,Li,Tao.,Cui,Hongliang.,Wang,Junling.,Yu,Xin.,...&zhaozhw@ynu.edu.cn.(2015).Diversity and characterization of Cd-tolerant dark septate endophytes (DSEs) associated with the roots of Nepal alder (Alnus nepalensis) in a metal mine tailing of southwest China.APPLIED SOIL ECOLOGY,93,11-18.
MLA Xu,Runbing,et al."Diversity and characterization of Cd-tolerant dark septate endophytes (DSEs) associated with the roots of Nepal alder (Alnus nepalensis) in a metal mine tailing of southwest China".APPLIED SOIL ECOLOGY 93(2015):11-18.
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