Transcriptome profiling and physiological studies reveal a major role for aromatic amino acids in mercury stress tolerance in rice seedlings
Mercury (Hg) is a serious environmental pollution threat to the planet. The accumulation of Hg in plants disrupts many cellular-level functions and inhibits growth and development, but the mechanism is not fully understood. To gain more insight into the cellular response to Hg, we performed a large-...
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| Veröffentlicht in: | PloS one 2014-05, Vol.9 (5), p.e95163 |
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| creator | Chen, Yun-An Chi, Wen-Chang Trinh, Ngoc Nam Huang, Li-Yao Chen, Ying-Chih Cheng, Kai-Teng Huang, Tsai-Lien Lin, Chung-Yi Huang, Hao-Jen |
| description | Mercury (Hg) is a serious environmental pollution threat to the planet. The accumulation of Hg in plants disrupts many cellular-level functions and inhibits growth and development, but the mechanism is not fully understood. To gain more insight into the cellular response to Hg, we performed a large-scale analysis of the rice transcriptome during Hg stress. Genes induced with short-term exposure represented functional categories of cell-wall formation, chemical detoxification, secondary metabolism, signal transduction and abiotic stress response. Moreover, Hg stress upregulated several genes involved in aromatic amino acids (Phe and Trp) and increased the level of free Phe and Trp content. Exogenous application of Phe and Trp to rice roots enhanced tolerance to Hg and effectively reduced Hg-induced production of reactive oxygen species. Hg induced calcium accumulation and activated mitogen-activated protein kinase. Further characterization of the Hg-responsive genes we identified may be helpful for better understanding the mechanisms of Hg in plants. |
| doi_str_mv | 10.1371/journal.pone.0095163 |
| format | Article |
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The accumulation of Hg in plants disrupts many cellular-level functions and inhibits growth and development, but the mechanism is not fully understood. To gain more insight into the cellular response to Hg, we performed a large-scale analysis of the rice transcriptome during Hg stress. Genes induced with short-term exposure represented functional categories of cell-wall formation, chemical detoxification, secondary metabolism, signal transduction and abiotic stress response. Moreover, Hg stress upregulated several genes involved in aromatic amino acids (Phe and Trp) and increased the level of free Phe and Trp content. Exogenous application of Phe and Trp to rice roots enhanced tolerance to Hg and effectively reduced Hg-induced production of reactive oxygen species. Hg induced calcium accumulation and activated mitogen-activated protein kinase. Further characterization of the Hg-responsive genes we identified may be helpful for better understanding the mechanisms of Hg in plants.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0095163</identifier><identifier>PMID: 24840062</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Abiotic stress ; Accumulation ; Amino acids ; Amino Acids, Aromatic - metabolism ; Analysis ; Aquatic plants ; Arabidopsis ; Biology and Life Sciences ; Calcium ; Cell walls ; Cellular signal transduction ; Cellular stress response ; Detoxification ; Environmental conditions ; Environmental pollution ; Gene expression ; Gene Expression Profiling ; Gene Expression Regulation, Plant - drug effects ; Gene Expression Regulation, Plant - genetics ; Genes ; Genomes ; Kinases ; Life sciences ; Lipid peroxidation ; MAP kinase ; Mercury ; Mercury (Planet) ; Mercury - toxicity ; Metabolism ; Oryza ; Oryza - drug effects ; Oryza - genetics ; Oryza - metabolism ; Oryza sativa ; Oxygen ; Phylogenetics ; Physical Sciences ; Physiology ; Plant Proteins - genetics ; Protein kinase ; Proteins ; Reactive oxygen species ; Rodents ; Seedlings ; Seedlings - drug effects ; Seedlings - genetics ; Seedlings - metabolism ; Stress ; Stresses ; Transcription factors ; Transduction</subject><ispartof>PloS one, 2014-05, Vol.9 (5), p.e95163</ispartof><rights>COPYRIGHT 2014 Public Library of Science</rights><rights>2014 Chen et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2014 Chen et al 2014 Chen et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c692t-96dbd73142330a51be57ef73e3a19ef294d4f8c4d6bed3715efbbf1a618342b43</citedby><cites>FETCH-LOGICAL-c692t-96dbd73142330a51be57ef73e3a19ef294d4f8c4d6bed3715efbbf1a618342b43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4026224/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4026224/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,2100,2926,23865,27923,27924,53790,53792,79371,79372</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24840062$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Wu, Keqiang</contributor><creatorcontrib>Chen, Yun-An</creatorcontrib><creatorcontrib>Chi, Wen-Chang</creatorcontrib><creatorcontrib>Trinh, Ngoc Nam</creatorcontrib><creatorcontrib>Huang, Li-Yao</creatorcontrib><creatorcontrib>Chen, Ying-Chih</creatorcontrib><creatorcontrib>Cheng, Kai-Teng</creatorcontrib><creatorcontrib>Huang, Tsai-Lien</creatorcontrib><creatorcontrib>Lin, Chung-Yi</creatorcontrib><creatorcontrib>Huang, Hao-Jen</creatorcontrib><title>Transcriptome profiling and physiological studies reveal a major role for aromatic amino acids in mercury stress tolerance in rice seedlings</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>Mercury (Hg) is a serious environmental pollution threat to the planet. The accumulation of Hg in plants disrupts many cellular-level functions and inhibits growth and development, but the mechanism is not fully understood. To gain more insight into the cellular response to Hg, we performed a large-scale analysis of the rice transcriptome during Hg stress. Genes induced with short-term exposure represented functional categories of cell-wall formation, chemical detoxification, secondary metabolism, signal transduction and abiotic stress response. Moreover, Hg stress upregulated several genes involved in aromatic amino acids (Phe and Trp) and increased the level of free Phe and Trp content. Exogenous application of Phe and Trp to rice roots enhanced tolerance to Hg and effectively reduced Hg-induced production of reactive oxygen species. Hg induced calcium accumulation and activated mitogen-activated protein kinase. Further characterization of the Hg-responsive genes we identified may be helpful for better understanding the mechanisms of Hg in plants.</description><subject>Abiotic stress</subject><subject>Accumulation</subject><subject>Amino acids</subject><subject>Amino Acids, Aromatic - metabolism</subject><subject>Analysis</subject><subject>Aquatic plants</subject><subject>Arabidopsis</subject><subject>Biology and Life Sciences</subject><subject>Calcium</subject><subject>Cell walls</subject><subject>Cellular signal transduction</subject><subject>Cellular stress response</subject><subject>Detoxification</subject><subject>Environmental conditions</subject><subject>Environmental pollution</subject><subject>Gene expression</subject><subject>Gene Expression Profiling</subject><subject>Gene Expression Regulation, Plant - drug effects</subject><subject>Gene Expression Regulation, Plant - genetics</subject><subject>Genes</subject><subject>Genomes</subject><subject>Kinases</subject><subject>Life sciences</subject><subject>Lipid peroxidation</subject><subject>MAP kinase</subject><subject>Mercury</subject><subject>Mercury (Planet)</subject><subject>Mercury - 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The accumulation of Hg in plants disrupts many cellular-level functions and inhibits growth and development, but the mechanism is not fully understood. To gain more insight into the cellular response to Hg, we performed a large-scale analysis of the rice transcriptome during Hg stress. Genes induced with short-term exposure represented functional categories of cell-wall formation, chemical detoxification, secondary metabolism, signal transduction and abiotic stress response. Moreover, Hg stress upregulated several genes involved in aromatic amino acids (Phe and Trp) and increased the level of free Phe and Trp content. Exogenous application of Phe and Trp to rice roots enhanced tolerance to Hg and effectively reduced Hg-induced production of reactive oxygen species. Hg induced calcium accumulation and activated mitogen-activated protein kinase. Further characterization of the Hg-responsive genes we identified may be helpful for better understanding the mechanisms of Hg in plants.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>24840062</pmid><doi>10.1371/journal.pone.0095163</doi><oa>free_for_read</oa></addata></record> |
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| source | MEDLINE; Full-Text Journals in Chemistry (Open access); DOAJ Directory of Open Access Journals; Public Library of Science; PubMed Central; EZB Electronic Journals Library |
| subjects | Abiotic stress Accumulation Amino acids Amino Acids, Aromatic - metabolism Analysis Aquatic plants Arabidopsis Biology and Life Sciences Calcium Cell walls Cellular signal transduction Cellular stress response Detoxification Environmental conditions Environmental pollution Gene expression Gene Expression Profiling Gene Expression Regulation, Plant - drug effects Gene Expression Regulation, Plant - genetics Genes Genomes Kinases Life sciences Lipid peroxidation MAP kinase Mercury Mercury (Planet) Mercury - toxicity Metabolism Oryza Oryza - drug effects Oryza - genetics Oryza - metabolism Oryza sativa Oxygen Phylogenetics Physical Sciences Physiology Plant Proteins - genetics Protein kinase Proteins Reactive oxygen species Rodents Seedlings Seedlings - drug effects Seedlings - genetics Seedlings - metabolism Stress Stresses Transcription factors Transduction |
| title | Transcriptome profiling and physiological studies reveal a major role for aromatic amino acids in mercury stress tolerance in rice seedlings |
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