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Title:
Comparative transcriptome analysis of duckweed (Landoltia punctata) in response to cadmium provides insights into molecular mechanisms underlying hyperaccumulation
Author: Xu, Hua1; Yu, Changjiang1,2; Xia, Xinli3; Li, Mingliang1; Li, Huiguang3; Wang, Yu1; Wang, Shumin1; Wang, Congpeng1; Ma, Yubin1; Zhou, Gongke1
Source: CHEMOSPHERE
Issued Date: 2018
Volume: 190, Pages:154-165
Keyword: Cadmium ; Duckweed ; Transcriptome ; Detoxification ; Sequestration ; Phytoremediation
DOI: 10.1016/j.chemosphere.2017.09.146
DOC Type: Article
English Abstract: Cadmium (Cd) is a detrimental environmental pollutant. Duckweeds have been considered promising candidates for Cd phytoremediation. Although many physiological studies have been conducted, the molecular mechanisms underlying Cd hyperaccumulation in duckweeds are largely unknown. In this study, clone 6001 of Landoltia punctata, which showed high Cd tolerance, was obtained by large-scale screening of over 200 duckweed clones. Subsequently, its growth, Cd flux, Cd accumulation, and Cd distribution characteristics were investigated. To further explore the global molecular mechanism, a comprehensive transcriptome analysis was performed. For RNA-Seq, samples were treated with 20 mu M CdCl2 for 0,1, 3, and 6 days. In total, 9,461, 9,847, and 9615 differentially expressed unigenes (DEGs) were discovered between Cd-treated and control (0 day) samples. DEG clustering and enrichment analysis identified several biological processes for coping with Cd stress. Genes involved in DNA repair acted as an early response to Cd, while RNA and protein metabolism would be likely to respond as well. Furthermore, the carbohydrate metabolic flux tended to be modulated in response to Cd stress, and upregulated genes involved in sulfur and ROS metabolism might cause high Cd tolerance. Vacuolar sequestration most likely played an important role in Cd detoxification in L punctata 6001. These novel findings provided important clues for molecular assisted screening and breeding of Cd hyperaccumulating cultivars for phytoremediation. (C) 2017 Elsevier Ltd. All rights reserved.
WOS Headings: Science & Technology ; Life Sciences & Biomedicine
WOS Subject: Environmental Sciences
WOS Subject Extended: Environmental Sciences & Ecology
WOS Keyword Plus: LEMNA-MINOR ; PHYSIOLOGICAL-RESPONSES ; ENVIRONMENTAL-STRESS ; GENE-EXPRESSION ; MISMATCH REPAIR ; PLANT-GROWTH ; HEAVY-METALS ; WASTE-WATER ; DNA-REPAIR ; POPULUS X
Indexed Type: SCI
Funder: Natural Science Foundation of China (NSFC)(51509237 ; National Key Technology Research and Development Program of China(2015BAD15B01) ; Natural Science Foundation of Shandong Province(ZR2015PE012) ; Key Project of Research and Development Plan of Shandong Province(2016GNC113020) ; Taishan Scholar Program of Shandong ; U1632140)
Language: 英语
WOS ID: WOS:000414881600017
Citation statistics:
Content Type: 期刊论文
URI: http://ir.qibebt.ac.cn/handle/337004/9686
Appears in Collections:植物代谢工程团队_期刊论文

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description.institution: 1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Engn Res Ctr Biomass Resources & Environm, Key Lab Biofuels,Shandong Prov Key Lab Energy Gen, Qingdao 266101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Natl Engn Lab Tree Breeding, Beijing 100084, Peoples R China

Recommended Citation:
Xu, Hua,Yu, Changjiang,Xia, Xinli,et al. Comparative transcriptome analysis of duckweed (Landoltia punctata) in response to cadmium provides insights into molecular mechanisms underlying hyperaccumulation[J]. CHEMOSPHERE,2018,190:154-165.
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