Chemical analysis of phenolic glycosides: art, facts, and artifacts.
Identifieur interne : 004D66 ( Main/Exploration ); précédent : 004D65; suivant : 004D67Chemical analysis of phenolic glycosides: art, facts, and artifacts.
Auteurs : R L Lindroth [États-Unis] ; M S Pajutee [États-Unis]Source :
- Oecologia [ 1432-1939 ] ; 1987.
Abstract
Phenolic glycosides have been the subject of considerable interest in recent ecological and systematic studies, especially those involving the Salicaceae. But these compounds are markedly labile in aqueous media, and the consequences of spontaneous degradation for valid interpretation of results have been largely ignored by researchers. We found that freeze-drying and oven-drying of leaf samples from several Populus and Salix species produced dramatic changes in the total and relative concentrations of specific phenolic glycosides, when compared to analyses of fresh material. Extraction in aqueous and alcoholic media for extended (24 h) periods also effected changes in glycoside concentrations. Alterations in phenolic glycoside concentrations, interconversions among glycosides, and production of artifactual glycosides result from a series of hydrolytic reactions. These deleterious effects can be best (but not entirely) avoided by the use of fresh plant material, cold, nonaqueous extraction solvents, and short extraction times. Because individual phenolic glycosides exhibit very different biological activities against herbivores, we caution ecologists to use utmost care in the performance and interpretation of phenolic glycoside assays.
DOI: 10.1007/BF00377359
PubMed: 28310428
Affiliations:
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But these compounds are markedly labile in aqueous media, and the consequences of spontaneous degradation for valid interpretation of results have been largely ignored by researchers. We found that freeze-drying and oven-drying of leaf samples from several Populus and Salix species produced dramatic changes in the total and relative concentrations of specific phenolic glycosides, when compared to analyses of fresh material. Extraction in aqueous and alcoholic media for extended (24 h) periods also effected changes in glycoside concentrations. Alterations in phenolic glycoside concentrations, interconversions among glycosides, and production of artifactual glycosides result from a series of hydrolytic reactions. These deleterious effects can be best (but not entirely) avoided by the use of fresh plant material, cold, nonaqueous extraction solvents, and short extraction times. Because individual phenolic glycosides exhibit very different biological activities against herbivores, we caution ecologists to use utmost care in the performance and interpretation of phenolic glycoside assays.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">28310428</PMID><DateRevised><Year>2019</Year><Month>11</Month><Day>20</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1432-1939</ISSN><JournalIssue CitedMedium="Internet"><Volume>74</Volume><Issue>1</Issue><PubDate><Year>1987</Year><Month>Nov</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Chemical analysis of phenolic glycosides: art, facts, and artifacts.</ArticleTitle><Pagination><MedlinePgn>144-148</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/BF00377359</ELocationID><Abstract><AbstractText>Phenolic glycosides have been the subject of considerable interest in recent ecological and systematic studies, especially those involving the Salicaceae. But these compounds are markedly labile in aqueous media, and the consequences of spontaneous degradation for valid interpretation of results have been largely ignored by researchers. We found that freeze-drying and oven-drying of leaf samples from several Populus and Salix species produced dramatic changes in the total and relative concentrations of specific phenolic glycosides, when compared to analyses of fresh material. Extraction in aqueous and alcoholic media for extended (24 h) periods also effected changes in glycoside concentrations. Alterations in phenolic glycoside concentrations, interconversions among glycosides, and production of artifactual glycosides result from a series of hydrolytic reactions. These deleterious effects can be best (but not entirely) avoided by the use of fresh plant material, cold, nonaqueous extraction solvents, and short extraction times. Because individual phenolic glycosides exhibit very different biological activities against herbivores, we caution ecologists to use utmost care in the performance and interpretation of phenolic glycoside assays.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Lindroth</LastName><ForeName>R L</ForeName><Initials>RL</Initials><AffiliationInfo><Affiliation>Department of Entomology, University of Wisconsin, 1630 Linden Drive, 53706, Madison, WI, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pajutee</LastName><ForeName>M S</ForeName><Initials>MS</Initials><AffiliationInfo><Affiliation>Department of Entomology, University of Wisconsin, 1630 Linden Drive, 53706, Madison, WI, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Oecologia</MedlineTA><NlmUniqueID>0150372</NlmUniqueID><ISSNLinking>0029-8549</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Phenolic glycosides</Keyword><Keyword MajorTopicYN="N">Phytochemical assays</Keyword><Keyword MajorTopicYN="N">Populus</Keyword><Keyword MajorTopicYN="N">Salicaceae</Keyword><Keyword MajorTopicYN="N">Salix</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>1987</Year><Month>04</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>3</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>1987</Year><Month>11</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1987</Year><Month>11</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28310428</ArticleId><ArticleId IdType="doi">10.1007/BF00377359</ArticleId><ArticleId IdType="pii">10.1007/BF00377359</ArticleId></ArticleIdList><ReferenceList><Reference><Citation>J Chromatogr. 1972 Sep 20;71(3):435-41</Citation><ArticleIdList><ArticleId IdType="pubmed">5074280</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1984 Apr;62(1):26-30</Citation><ArticleIdList><ArticleId IdType="pubmed">28310733</ArticleId></ArticleIdList></Reference><Reference><Citation>Pharmazie. 1971 Apr;26(4):227-31</Citation><ArticleIdList><ArticleId IdType="pubmed">5103360</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1985 Feb;65(3):319-323</Citation><ArticleIdList><ArticleId IdType="pubmed">28310435</ArticleId></ArticleIdList></Reference><Reference><Citation>J Chromatogr. 1969 Apr 8;40(3):370-6</Citation><ArticleIdList><ArticleId IdType="pubmed">5780514</ArticleId></ArticleIdList></Reference><Reference><Citation>J Chromatogr. 1968 Jul 23;36(1):22-30</Citation><ArticleIdList><ArticleId IdType="pubmed">5669556</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1985 Aug;67(1):52-56</Citation><ArticleIdList><ArticleId IdType="pubmed">28309845</ArticleId></ArticleIdList></Reference><Reference><Citation>Pharmazie. 1970 Dec;25(12):780-9</Citation><ArticleIdList><ArticleId IdType="pubmed">5499285</ArticleId></ArticleIdList></Reference><Reference><Citation>Planta Med. 1967 Feb;15(1):35-40</Citation><ArticleIdList><ArticleId IdType="pubmed">5604522</ArticleId></ArticleIdList></Reference><Reference><Citation>Science. 1985 Aug 16;229(4714):649-51</Citation><ArticleIdList><ArticleId IdType="pubmed">17739376</ArticleId></ArticleIdList></Reference><Reference><Citation>J Chromatogr. 1973 Sep 26;84(2):315-8</Citation><ArticleIdList><ArticleId IdType="pubmed">4745801</ArticleId></ArticleIdList></Reference><Reference><Citation>J Chromatogr. 1972 Sep 20;71(3):427-34</Citation><ArticleIdList><ArticleId IdType="pubmed">5074279</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Wisconsin</li></region></list><tree><country name="États-Unis"><region name="Wisconsin"><name sortKey="Lindroth, R L" sort="Lindroth, R L" uniqKey="Lindroth R" first="R L" last="Lindroth">R L Lindroth</name></region><name sortKey="Pajutee, M S" sort="Pajutee, M S" uniqKey="Pajutee M" first="M S" last="Pajutee">M S Pajutee</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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