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Comparative transcriptome analysis of duckweed (Landoltia punctata) in response to cadmium provides insights into molecular mechanisms underlying hyperaccumulation
Xu, Hua1; Yu, Changjiang1,2; Xia, Xinli3; Li, Mingliang1; Li, Huiguang3; Wang, Yu1; Wang, Shumin1; Wang, Congpeng1; Ma, Yubin1; Zhou, Gongke1
2018
Source PublicationCHEMOSPHERE
Volume190Pages:154-165
AbstractCadmium (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.
SubtypeArticle
KeywordCadmium Duckweed Transcriptome Detoxification Sequestration Phytoremediation
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.chemosphere.2017.09.146
WOS KeywordLEMNA-MINOR ; PHYSIOLOGICAL-RESPONSES ; ENVIRONMENTAL-STRESS ; GENE-EXPRESSION ; MISMATCH REPAIR ; PLANT-GROWTH ; HEAVY-METALS ; WASTE-WATER ; DNA-REPAIR ; POPULUS X
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
Funding OrganizationNatural 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)
WOS SubjectEnvironmental Sciences
WOS IDWOS:000414881600017
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qibebt.ac.cn/handle/337004/9686
Collection资源植物与环境工程研究组
Affiliation1.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
GB/T 7714
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.
APA Xu, Hua.,Yu, Changjiang.,Xia, Xinli.,Li, Mingliang.,Li, Huiguang.,...&Zhou, Gongke.(2018).Comparative transcriptome analysis of duckweed (Landoltia punctata) in response to cadmium provides insights into molecular mechanisms underlying hyperaccumulation.CHEMOSPHERE,190,154-165.
MLA Xu, Hua,et al."Comparative transcriptome analysis of duckweed (Landoltia punctata) in response to cadmium provides insights into molecular mechanisms underlying hyperaccumulation".CHEMOSPHERE 190(2018):154-165.
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