Net cadmium flux and accumulation reveal tissue-specific oxidative stress and detoxification in Populus × canescens.
Identifieur interne : 002D81 ( Main/Exploration ); précédent : 002D80; suivant : 002D82Net cadmium flux and accumulation reveal tissue-specific oxidative stress and detoxification in Populus × canescens.
Auteurs : Jiali He [République populaire de Chine] ; Jingjing Qin ; Lingyun Long ; Yonglu Ma ; Hong Li ; Ke Li ; Xiangning Jiang ; Tongxian Liu ; Andrea Polle ; Zongsuo Liang ; Zhi-Bin LuoSource :
- Physiologia plantarum [ 1399-3054 ] ; 2011.
Descripteurs français
- KwdFr :
- Antioxydants (métabolisme), Cadmium (pharmacocinétique), Composés du cadmium (pharmacocinétique), Détoxication de phase I (MeSH), Espèces réactives de l'oxygène (métabolisme), Feuilles de plante (métabolisme), Métabolisme énergétique (effets des médicaments et des substances chimiques), Métaux lourds (métabolisme), Populus (effets des médicaments et des substances chimiques), Populus (métabolisme), Racines de plante (métabolisme), Rhizosphère (MeSH), Stress oxydatif (physiologie), Sulfates (pharmacocinétique), Xylème (métabolisme), Écorce (métabolisme).
- MESH :
- effets des médicaments et des substances chimiques : Métabolisme énergétique, Populus.
- métabolisme : Antioxydants, Espèces réactives de l'oxygène, Feuilles de plante, Métaux lourds, Populus, Racines de plante, Xylème, Écorce.
- pharmacocinétique : Cadmium, Composés du cadmium, Sulfates.
- physiologie : Stress oxydatif.
- Détoxication de phase I, Rhizosphère.
English descriptors
- KwdEn :
- Antioxidants (metabolism), Cadmium (pharmacokinetics), Cadmium Compounds (pharmacokinetics), Energy Metabolism (drug effects), Metabolic Detoxication, Phase I (MeSH), Metals, Heavy (metabolism), Oxidative Stress (physiology), Plant Bark (metabolism), Plant Leaves (metabolism), Plant Roots (metabolism), Populus (drug effects), Populus (metabolism), Reactive Oxygen Species (metabolism), Rhizosphere (MeSH), Sulfates (pharmacokinetics), Xylem (metabolism).
- MESH :
- chemical , metabolism : Antioxidants, Metals, Heavy, Reactive Oxygen Species.
- chemical , pharmacokinetics : Cadmium, Cadmium Compounds, Sulfates.
- drug effects : Energy Metabolism, Populus.
- metabolism : Plant Bark, Plant Leaves, Plant Roots, Populus, Xylem.
- physiology : Oxidative Stress.
- Metabolic Detoxication, Phase I, Rhizosphere.
Abstract
To characterize the dynamics of Cd²⁺ flux in the rhizosphere and to study cadmium (Cd) plant-internal partitioning in roots, wood, bark and leaves in relation to energy metabolism, reactive oxygen species (ROS) formation and antioxidants, Populus × canescens plantlets were exposed to either 0 or 50 µM CdSO₄ for up to 20 days in the nutrient solution. A strong net Cd²⁺ influx in root apex was observed after Cd exposure for 24 h, even if net Cd²⁺ influx decreased gradually in roots. A large amount of Cd was accumulated in roots. Cd ions were uploaded via the xylem to leaves and further transported to the phloem where significant accumulation was detected. Cd accumulation led to decreased photosynthetic carbon assimilation but not to the depletion in soluble carbohydrates. Increased levels of ROS were present in all tissues, except the bark of Cd-exposed poplars. To combat Cd-induced superoxide and hydrogen peroxide, P. × canescens appeared to rely mainly on the formation of soluble phenolics as these compounds showed the highest accumulation in the bark and the lowest in wood. Other potential radical scavengers such as proline, sugar alcohols and antioxidant enzymes showed tissue- and exposure time-specific responses to Cd. These results indicate a complex pattern of internal Cd allocation in P. × canescens resulting in higher ROS stress in wood than in bark and intermediate responses in roots and leaves, probably because of differential capacities of these tissues for the production of protective phenolic compounds.
DOI: 10.1111/j.1399-3054.2011.01487.x
PubMed: 21615414
Affiliations:
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Agriculture & Forestry University, Yangling, Shaanxi 712100, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>College of Life Sciences, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100</wicri:regionArea><wicri:noRegion>Shaanxi 712100</wicri:noRegion></affiliation></author><author><name sortKey="Qin, Jingjing" sort="Qin, Jingjing" uniqKey="Qin J" first="Jingjing" last="Qin">Jingjing Qin</name></author><author><name sortKey="Long, Lingyun" sort="Long, Lingyun" uniqKey="Long L" first="Lingyun" last="Long">Lingyun Long</name></author><author><name sortKey="Ma, Yonglu" sort="Ma, Yonglu" uniqKey="Ma Y" first="Yonglu" last="Ma">Yonglu Ma</name></author><author><name sortKey="Li, Hong" sort="Li, Hong" uniqKey="Li H" first="Hong" last="Li">Hong Li</name></author><author><name sortKey="Li, Ke" sort="Li, Ke" uniqKey="Li K" first="Ke" last="Li">Ke Li</name></author><author><name sortKey="Jiang, Xiangning" sort="Jiang, 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(effets des médicaments et des substances chimiques)</term><term>Populus (métabolisme)</term><term>Racines de plante (métabolisme)</term><term>Rhizosphère (MeSH)</term><term>Stress oxydatif (physiologie)</term><term>Sulfates (pharmacocinétique)</term><term>Xylème (métabolisme)</term><term>Écorce (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Antioxidants</term><term>Metals, Heavy</term><term>Reactive Oxygen Species</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacokinetics" xml:lang="en"><term>Cadmium</term><term>Cadmium Compounds</term><term>Sulfates</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Energy Metabolism</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="effets des médicaments et des substances chimiques" xml:lang="fr"><term>Métabolisme énergétique</term><term>Populus</term></keywords><keywords scheme="MESH" 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I</term><term>Rhizosphère</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To characterize the dynamics of Cd²⁺ flux in the rhizosphere and to study cadmium (Cd) plant-internal partitioning in roots, wood, bark and leaves in relation to energy metabolism, reactive oxygen species (ROS) formation and antioxidants, Populus × canescens plantlets were exposed to either 0 or 50 µM CdSO₄ for up to 20 days in the nutrient solution. A strong net Cd²⁺ influx in root apex was observed after Cd exposure for 24 h, even if net Cd²⁺ influx decreased gradually in roots. A large amount of Cd was accumulated in roots. Cd ions were uploaded via the xylem to leaves and further transported to the phloem where significant accumulation was detected. Cd accumulation led to decreased photosynthetic carbon assimilation but not to the depletion in soluble carbohydrates. Increased levels of ROS were present in all tissues, except the bark of Cd-exposed poplars. To combat Cd-induced superoxide and hydrogen peroxide, P. × canescens appeared to rely mainly on the formation of soluble phenolics as these compounds showed the highest accumulation in the bark and the lowest in wood. Other potential radical scavengers such as proline, sugar alcohols and antioxidant enzymes showed tissue- and exposure time-specific responses to Cd. These results indicate a complex pattern of internal Cd allocation in P. × canescens resulting in higher ROS stress in wood than in bark and intermediate responses in roots and leaves, probably because of differential capacities of these tissues for the production of protective phenolic compounds.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21615414</PMID><DateCompleted><Year>2012</Year><Month>01</Month><Day>10</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1399-3054</ISSN><JournalIssue CitedMedium="Internet"><Volume>143</Volume><Issue>1</Issue><PubDate><Year>2011</Year><Month>Sep</Month></PubDate></JournalIssue><Title>Physiologia plantarum</Title><ISOAbbreviation>Physiol Plant</ISOAbbreviation></Journal><ArticleTitle>Net cadmium flux and accumulation reveal tissue-specific oxidative stress and detoxification in Populus × canescens.</ArticleTitle><Pagination><MedlinePgn>50-63</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/j.1399-3054.2011.01487.x</ELocationID><Abstract><AbstractText>To characterize the dynamics of Cd²⁺ flux in the rhizosphere and to study cadmium (Cd) plant-internal partitioning in roots, wood, bark and leaves in relation to energy metabolism, reactive oxygen species (ROS) formation and antioxidants, Populus × canescens plantlets were exposed to either 0 or 50 µM CdSO₄ for up to 20 days in the nutrient solution. A strong net Cd²⁺ influx in root apex was observed after Cd exposure for 24 h, even if net Cd²⁺ influx decreased gradually in roots. A large amount of Cd was accumulated in roots. Cd ions were uploaded via the xylem to leaves and further transported to the phloem where significant accumulation was detected. Cd accumulation led to decreased photosynthetic carbon assimilation but not to the depletion in soluble carbohydrates. Increased levels of ROS were present in all tissues, except the bark of Cd-exposed poplars. To combat Cd-induced superoxide and hydrogen peroxide, P. × canescens appeared to rely mainly on the formation of soluble phenolics as these compounds showed the highest accumulation in the bark and the lowest in wood. Other potential radical scavengers such as proline, sugar alcohols and antioxidant enzymes showed tissue- and exposure time-specific responses to Cd. These results indicate a complex pattern of internal Cd allocation in P. × canescens resulting in higher ROS stress in wood than in bark and intermediate responses in roots and leaves, probably because of differential capacities of these tissues for the production of protective phenolic compounds.</AbstractText><CopyrightInformation>Copyright © Physiologia Plantarum 2011.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>He</LastName><ForeName>Jiali</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>College of Life Sciences, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Qin</LastName><ForeName>Jingjing</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Long</LastName><ForeName>Lingyun</ForeName><Initials>L</Initials></Author><Author ValidYN="Y"><LastName>Ma</LastName><ForeName>Yonglu</ForeName><Initials>Y</Initials></Author><Author ValidYN="Y"><LastName>Li</LastName><ForeName>Hong</ForeName><Initials>H</Initials></Author><Author ValidYN="Y"><LastName>Li</LastName><ForeName>Ke</ForeName><Initials>K</Initials></Author><Author ValidYN="Y"><LastName>Jiang</LastName><ForeName>Xiangning</ForeName><Initials>X</Initials></Author><Author ValidYN="Y"><LastName>Liu</LastName><ForeName>Tongxian</ForeName><Initials>T</Initials></Author><Author ValidYN="Y"><LastName>Polle</LastName><ForeName>Andrea</ForeName><Initials>A</Initials></Author><Author ValidYN="Y"><LastName>Liang</LastName><ForeName>Zongsuo</ForeName><Initials>Z</Initials></Author><Author ValidYN="Y"><LastName>Luo</LastName><ForeName>Zhi-Bin</ForeName><Initials>ZB</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2011</Year><Month>06</Month><Day>15</Day></ArticleDate></Article><MedlineJournalInfo><Country>Denmark</Country><MedlineTA>Physiol Plant</MedlineTA><NlmUniqueID>1256322</NlmUniqueID><ISSNLinking>0031-9317</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D000975">Antioxidants</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D019187">Cadmium Compounds</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D019216">Metals, Heavy</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D017382">Reactive Oxygen Species</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D013431">Sulfates</NameOfSubstance></Chemical><Chemical><RegistryNumber>00BH33GNGH</RegistryNumber><NameOfSubstance UI="D002104">Cadmium</NameOfSubstance></Chemical><Chemical><RegistryNumber>947UNF3Z6O</RegistryNumber><NameOfSubstance UI="C037123">cadmium sulfate</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000975" MajorTopicYN="N">Antioxidants</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002104" MajorTopicYN="N">Cadmium</DescriptorName><QualifierName UI="Q000493" MajorTopicYN="Y">pharmacokinetics</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D019187" MajorTopicYN="N">Cadmium Compounds</DescriptorName><QualifierName UI="Q000493" MajorTopicYN="N">pharmacokinetics</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D004734" MajorTopicYN="N">Energy Metabolism</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D050216" MajorTopicYN="N">Metabolic Detoxication, Phase I</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D019216" MajorTopicYN="N">Metals, Heavy</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018384" MajorTopicYN="N">Oxidative Stress</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D024301" MajorTopicYN="N">Plant Bark</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017382" MajorTopicYN="N">Reactive Oxygen Species</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D058441" MajorTopicYN="N">Rhizosphere</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013431" MajorTopicYN="N">Sulfates</DescriptorName><QualifierName UI="Q000493" MajorTopicYN="N">pharmacokinetics</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2011</Year><Month>5</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2011</Year><Month>5</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>1</Month><Day>11</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21615414</ArticleId><ArticleId IdType="doi">10.1111/j.1399-3054.2011.01487.x</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>République populaire de Chine</li></country></list><tree><noCountry><name sortKey="Jiang, Xiangning" sort="Jiang, Xiangning" uniqKey="Jiang X" first="Xiangning" last="Jiang">Xiangning Jiang</name><name sortKey="Li, Hong" sort="Li, Hong" uniqKey="Li H" first="Hong" last="Li">Hong Li</name><name sortKey="Li, Ke" sort="Li, Ke" uniqKey="Li K" first="Ke" last="Li">Ke Li</name><name sortKey="Liang, Zongsuo" sort="Liang, Zongsuo" uniqKey="Liang Z" first="Zongsuo" last="Liang">Zongsuo Liang</name><name sortKey="Liu, Tongxian" sort="Liu, Tongxian" uniqKey="Liu T" first="Tongxian" last="Liu">Tongxian Liu</name><name sortKey="Long, Lingyun" sort="Long, Lingyun" uniqKey="Long L" first="Lingyun" last="Long">Lingyun Long</name><name sortKey="Luo, Zhi Bin" sort="Luo, Zhi Bin" uniqKey="Luo Z" first="Zhi-Bin" last="Luo">Zhi-Bin Luo</name><name sortKey="Ma, Yonglu" sort="Ma, Yonglu" uniqKey="Ma Y" first="Yonglu" last="Ma">Yonglu Ma</name><name sortKey="Polle, Andrea" sort="Polle, Andrea" uniqKey="Polle A" first="Andrea" last="Polle">Andrea Polle</name><name sortKey="Qin, Jingjing" sort="Qin, Jingjing" uniqKey="Qin J" first="Jingjing" last="Qin">Jingjing Qin</name></noCountry><country name="République populaire de Chine"><noRegion><name sortKey="He, Jiali" sort="He, Jiali" uniqKey="He J" first="Jiali" last="He">Jiali 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