Is stimulation of carotenoid biosynthesis in arbuscular mycorrhizal roots a general phenomenon?
Identifieur interne : 003507 ( Main/Corpus ); précédent : 003506; suivant : 003508Is stimulation of carotenoid biosynthesis in arbuscular mycorrhizal roots a general phenomenon?
Auteurs : Thomas Fester ; Victor Wray ; Manfred Nimtz ; Dieter StrackSource :
- Phytochemistry [ 0031-9422 ] ; 2005.
English descriptors
- KwdEn :
- MESH :
- chemical , biosynthesis : Carotenoids.
- metabolism : Mycorrhizae, Plant Roots.
- Kinetics, Magnetic Resonance Spectroscopy.
Abstract
The identification and quantification of cyclohexenone glycoside derivatives from the model legume Lotus japonicus revealed far higher levels than expected according to the stoichiometric relation to another, already determined carotenoid cleavage product, i.e., mycorradicin. Mycorradicin is responsible for the yellow coloration of many arbuscular mycorrhizal (AM) roots and is usually esterified in a complex way to other compounds. After liberation from such complexes it has been detected in AM roots of many, but not of all plants examined. The non-stoichiometric occurrence of this compound compared with other carotenoid cleavage products suggested that carotenoid biosynthesis might be activated upon mycorrhization even in plant species without detectable levels of mycorradicin. This assumption has been supported by inhibition of a key enzyme of carotenoid biosynthesis (phytoene desaturase) and quantification of the accumulating enzymic substrate (phytoene). Our observations suggest that the activation of carotenoid biosynthesis in AM roots is a general phenomenon and that quantification of mycorradicin is not always a good indicator for this activation.
DOI: 10.1016/j.phytochem.2005.05.009
PubMed: 16002104
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pubmed:16002104Le document en format XML
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Mycorradicin is responsible for the yellow coloration of many arbuscular mycorrhizal (AM) roots and is usually esterified in a complex way to other compounds. After liberation from such complexes it has been detected in AM roots of many, but not of all plants examined. The non-stoichiometric occurrence of this compound compared with other carotenoid cleavage products suggested that carotenoid biosynthesis might be activated upon mycorrhization even in plant species without detectable levels of mycorradicin. This assumption has been supported by inhibition of a key enzyme of carotenoid biosynthesis (phytoene desaturase) and quantification of the accumulating enzymic substrate (phytoene). Our observations suggest that the activation of carotenoid biosynthesis in AM roots is a general phenomenon and that quantification of mycorradicin is not always a good indicator for this activation.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">16002104</PMID><DateCompleted><Year>2005</Year><Month>10</Month><Day>27</Day></DateCompleted><DateRevised><Year>2006</Year><Month>11</Month><Day>15</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0031-9422</ISSN><JournalIssue CitedMedium="Print"><Volume>66</Volume><Issue>15</Issue><PubDate><Year>2005</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Phytochemistry</Title><ISOAbbreviation>Phytochemistry</ISOAbbreviation></Journal><ArticleTitle>Is stimulation of carotenoid biosynthesis in arbuscular mycorrhizal roots a general phenomenon?</ArticleTitle><Pagination><MedlinePgn>1781-6</MedlinePgn></Pagination><Abstract><AbstractText>The identification and quantification of cyclohexenone glycoside derivatives from the model legume Lotus japonicus revealed far higher levels than expected according to the stoichiometric relation to another, already determined carotenoid cleavage product, i.e., mycorradicin. Mycorradicin is responsible for the yellow coloration of many arbuscular mycorrhizal (AM) roots and is usually esterified in a complex way to other compounds. After liberation from such complexes it has been detected in AM roots of many, but not of all plants examined. The non-stoichiometric occurrence of this compound compared with other carotenoid cleavage products suggested that carotenoid biosynthesis might be activated upon mycorrhization even in plant species without detectable levels of mycorradicin. This assumption has been supported by inhibition of a key enzyme of carotenoid biosynthesis (phytoene desaturase) and quantification of the accumulating enzymic substrate (phytoene). Our observations suggest that the activation of carotenoid biosynthesis in AM roots is a general phenomenon and that quantification of mycorradicin is not always a good indicator for this activation.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Fester</LastName><ForeName>Thomas</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>Department of Secondary Metabolism, Leibniz Institute of Plant Biochemistry (IPB), Weinberg 3, D-06120 Halle, Germany. tfester@ipb-halle.de</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wray</LastName><ForeName>Victor</ForeName><Initials>V</Initials></Author><Author ValidYN="Y"><LastName>Nimtz</LastName><ForeName>Manfred</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Strack</LastName><ForeName>Dieter</ForeName><Initials>D</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></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Phytochemistry</MedlineTA><NlmUniqueID>0151434</NlmUniqueID><ISSNLinking>0031-9422</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>36-88-4</RegistryNumber><NameOfSubstance UI="D002338">Carotenoids</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002338" MajorTopicYN="N">Carotenoids</DescriptorName><QualifierName UI="Q000096" MajorTopicYN="Y">biosynthesis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D007700" MajorTopicYN="N">Kinetics</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009682" MajorTopicYN="N">Magnetic Resonance Spectroscopy</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2004</Year><Month>12</Month><Day>10</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2005</Year><Month>05</Month><Day>04</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2005</Year><Month>05</Month><Day>04</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2005</Year><Month>7</Month><Day>9</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2005</Year><Month>10</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2005</Year><Month>7</Month><Day>9</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">16002104</ArticleId><ArticleId IdType="pii">S0031-9422(05)00226-8</ArticleId><ArticleId IdType="doi">10.1016/j.phytochem.2005.05.009</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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