Spatial and seasonal variation in amino compounds in the xylem sap of a mistletoe (Viscum album) and its hosts (Populus spp. and Abies alba).
Identifieur interne : 004306 ( Main/Corpus ); précédent : 004305; suivant : 004307Spatial and seasonal variation in amino compounds in the xylem sap of a mistletoe (Viscum album) and its hosts (Populus spp. and Abies alba).
Auteurs : Peter Escher ; Monika Eiblmeier ; Ilka Hetzger ; Heinz RennenbergSource :
- Tree physiology [ 0829-318X ] ; 2004.
English descriptors
- KwdEn :
- Abies (chemistry), Abies (parasitology), Abies (physiology), Amino Acids (analysis), Plant Leaves (chemistry), Plant Leaves (physiology), Plant Stems (chemistry), Plant Stems (physiology), Populus (chemistry), Populus (parasitology), Populus (physiology), Seasons (MeSH), Trees (chemistry), Trees (parasitology), Trees (physiology), Viscum (chemistry), Viscum (physiology).
- MESH :
- chemical , analysis : Amino Acids.
- chemistry : Abies, Plant Leaves, Plant Stems, Populus, Trees, Viscum.
- parasitology : Abies, Populus, Trees.
- physiology : Abies, Plant Leaves, Plant Stems, Populus, Trees, Viscum.
- Seasons.
Abstract
In a field study, the composition and concentrations of amino compounds in the xylem sap of the mistletoe, Viscum album L., and in the xylem sap of two host species, an evergreen conifer (Abies alba Mill.) and a deciduous broad-leaved tree (Populus x euramericana), were analyzed. The xylem sap of both hosts and mistletoe contained large, but similar amounts of total organic nitrogen in low molecular weight amino compounds (TONLW). Nevertheless, individual amino compounds accumulated in the xylem sap of mistletoe relative to the host xylem sap, indicating selective uptake. In the xylem sap of Populus, major amino compounds (asparagine (Asn) and glutamine (Gln)) and the bulk parameters, TONLW and proteinogenic amino acids, showed significant seasonal variation. In Abies and in mistletoe on either host, variation of amino compounds in xylem sap was largely explained by inter-annual differences, not by seasonal variation. In both hosts, TONLW in the xylem sap was dominated by Gln. There was a steady decrease in relative abundance of Gln from the host xylem sap to the mistletoe xylem sap and to the stems and leaves of mistletoe. Simultaneously, the abundance of arginine (Arg) increased. Arginine was the predominant amino compound in the stems and leaves of mistletoe, occurring at concentrations previously observed only in leaves of trees exposed to excess nitrogen. We conclude that Gln (2 mol N mol(-1)) delivered by the host xylem sap is converted, in mistletoe, to Arg (4 mol N mol(-1)) and that the organic carbon liberated from Gln contributes significantly to the parasite's heterotrophic carbon gain. Statistical analyses of the data support this conclusion. Accumulation of Arg in mistletoe is an indication of excess N supply as a result of the uptake of amino compounds from the host xylem sap and a lack of phloem uploading.
DOI: 10.1093/treephys/24.6.639
PubMed: 15059764
Links to Exploration step
pubmed:15059764Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Spatial and seasonal variation in amino compounds in the xylem sap of a mistletoe (Viscum album) and its hosts (Populus spp. and Abies alba).</title><author><name sortKey="Escher, Peter" sort="Escher, Peter" uniqKey="Escher P" first="Peter" last="Escher">Peter Escher</name><affiliation><nlm:affiliation>Institute of Forest Botany and Tree Physiology, Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 053/054, D-79110 Freiburg i.B., Germany.</nlm:affiliation></affiliation></author><author><name sortKey="Eiblmeier, Monika" sort="Eiblmeier, Monika" uniqKey="Eiblmeier M" first="Monika" last="Eiblmeier">Monika Eiblmeier</name></author><author><name sortKey="Hetzger, Ilka" sort="Hetzger, Ilka" uniqKey="Hetzger I" first="Ilka" last="Hetzger">Ilka Hetzger</name></author><author><name sortKey="Rennenberg, Heinz" sort="Rennenberg, Heinz" uniqKey="Rennenberg H" first="Heinz" last="Rennenberg">Heinz Rennenberg</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2004">2004</date><idno type="RBID">pubmed:15059764</idno><idno type="pmid">15059764</idno><idno type="doi">10.1093/treephys/24.6.639</idno><idno type="wicri:Area/Main/Corpus">004306</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">004306</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Spatial and seasonal variation in amino compounds in the xylem sap of a mistletoe (Viscum album) and its hosts (Populus spp. and Abies alba).</title><author><name sortKey="Escher, Peter" sort="Escher, Peter" uniqKey="Escher P" first="Peter" last="Escher">Peter Escher</name><affiliation><nlm:affiliation>Institute of Forest Botany and Tree Physiology, Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 053/054, D-79110 Freiburg i.B., Germany.</nlm:affiliation></affiliation></author><author><name sortKey="Eiblmeier, Monika" sort="Eiblmeier, Monika" uniqKey="Eiblmeier M" first="Monika" last="Eiblmeier">Monika Eiblmeier</name></author><author><name sortKey="Hetzger, Ilka" sort="Hetzger, Ilka" uniqKey="Hetzger I" first="Ilka" last="Hetzger">Ilka Hetzger</name></author><author><name sortKey="Rennenberg, Heinz" sort="Rennenberg, Heinz" uniqKey="Rennenberg H" first="Heinz" last="Rennenberg">Heinz Rennenberg</name></author></analytic><series><title level="j">Tree physiology</title><idno type="ISSN">0829-318X</idno><imprint><date when="2004" type="published">2004</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Abies (chemistry)</term><term>Abies (parasitology)</term><term>Abies (physiology)</term><term>Amino Acids (analysis)</term><term>Plant Leaves (chemistry)</term><term>Plant Leaves (physiology)</term><term>Plant Stems (chemistry)</term><term>Plant Stems (physiology)</term><term>Populus (chemistry)</term><term>Populus (parasitology)</term><term>Populus (physiology)</term><term>Seasons (MeSH)</term><term>Trees (chemistry)</term><term>Trees (parasitology)</term><term>Trees (physiology)</term><term>Viscum (chemistry)</term><term>Viscum (physiology)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Amino Acids</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Abies</term><term>Plant Leaves</term><term>Plant Stems</term><term>Populus</term><term>Trees</term><term>Viscum</term></keywords><keywords scheme="MESH" qualifier="parasitology" xml:lang="en"><term>Abies</term><term>Populus</term><term>Trees</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Abies</term><term>Plant Leaves</term><term>Plant Stems</term><term>Populus</term><term>Trees</term><term>Viscum</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Seasons</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In a field study, the composition and concentrations of amino compounds in the xylem sap of the mistletoe, Viscum album L., and in the xylem sap of two host species, an evergreen conifer (Abies alba Mill.) and a deciduous broad-leaved tree (Populus x euramericana), were analyzed. The xylem sap of both hosts and mistletoe contained large, but similar amounts of total organic nitrogen in low molecular weight amino compounds (TONLW). Nevertheless, individual amino compounds accumulated in the xylem sap of mistletoe relative to the host xylem sap, indicating selective uptake. In the xylem sap of Populus, major amino compounds (asparagine (Asn) and glutamine (Gln)) and the bulk parameters, TONLW and proteinogenic amino acids, showed significant seasonal variation. In Abies and in mistletoe on either host, variation of amino compounds in xylem sap was largely explained by inter-annual differences, not by seasonal variation. In both hosts, TONLW in the xylem sap was dominated by Gln. There was a steady decrease in relative abundance of Gln from the host xylem sap to the mistletoe xylem sap and to the stems and leaves of mistletoe. Simultaneously, the abundance of arginine (Arg) increased. Arginine was the predominant amino compound in the stems and leaves of mistletoe, occurring at concentrations previously observed only in leaves of trees exposed to excess nitrogen. We conclude that Gln (2 mol N mol(-1)) delivered by the host xylem sap is converted, in mistletoe, to Arg (4 mol N mol(-1)) and that the organic carbon liberated from Gln contributes significantly to the parasite's heterotrophic carbon gain. Statistical analyses of the data support this conclusion. Accumulation of Arg in mistletoe is an indication of excess N supply as a result of the uptake of amino compounds from the host xylem sap and a lack of phloem uploading.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">15059764</PMID><DateCompleted><Year>2005</Year><Month>12</Month><Day>28</Day></DateCompleted><DateRevised><Year>2019</Year><Month>05</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0829-318X</ISSN><JournalIssue CitedMedium="Print"><Volume>24</Volume><Issue>6</Issue><PubDate><Year>2004</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Spatial and seasonal variation in amino compounds in the xylem sap of a mistletoe (Viscum album) and its hosts (Populus spp. and Abies alba).</ArticleTitle><Pagination><MedlinePgn>639-50</MedlinePgn></Pagination><Abstract><AbstractText>In a field study, the composition and concentrations of amino compounds in the xylem sap of the mistletoe, Viscum album L., and in the xylem sap of two host species, an evergreen conifer (Abies alba Mill.) and a deciduous broad-leaved tree (Populus x euramericana), were analyzed. The xylem sap of both hosts and mistletoe contained large, but similar amounts of total organic nitrogen in low molecular weight amino compounds (TONLW). Nevertheless, individual amino compounds accumulated in the xylem sap of mistletoe relative to the host xylem sap, indicating selective uptake. In the xylem sap of Populus, major amino compounds (asparagine (Asn) and glutamine (Gln)) and the bulk parameters, TONLW and proteinogenic amino acids, showed significant seasonal variation. In Abies and in mistletoe on either host, variation of amino compounds in xylem sap was largely explained by inter-annual differences, not by seasonal variation. In both hosts, TONLW in the xylem sap was dominated by Gln. There was a steady decrease in relative abundance of Gln from the host xylem sap to the mistletoe xylem sap and to the stems and leaves of mistletoe. Simultaneously, the abundance of arginine (Arg) increased. Arginine was the predominant amino compound in the stems and leaves of mistletoe, occurring at concentrations previously observed only in leaves of trees exposed to excess nitrogen. We conclude that Gln (2 mol N mol(-1)) delivered by the host xylem sap is converted, in mistletoe, to Arg (4 mol N mol(-1)) and that the organic carbon liberated from Gln contributes significantly to the parasite's heterotrophic carbon gain. Statistical analyses of the data support this conclusion. Accumulation of Arg in mistletoe is an indication of excess N supply as a result of the uptake of amino compounds from the host xylem sap and a lack of phloem uploading.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Escher</LastName><ForeName>Peter</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>Institute of Forest Botany and Tree Physiology, Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 053/054, D-79110 Freiburg i.B., Germany.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Eiblmeier</LastName><ForeName>Monika</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Hetzger</LastName><ForeName>Ilka</ForeName><Initials>I</Initials></Author><Author ValidYN="Y"><LastName>Rennenberg</LastName><ForeName>Heinz</ForeName><Initials>H</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>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D000596">Amino Acids</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D028202" MajorTopicYN="N">Abies</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000469" MajorTopicYN="Y">parasitology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D000596" MajorTopicYN="N">Amino Acids</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000469" MajorTopicYN="Y">parasitology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012621" MajorTopicYN="N">Seasons</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000469" MajorTopicYN="Y">parasitology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D028181" MajorTopicYN="N">Viscum</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2004</Year><Month>4</Month><Day>3</Day><Hour>5</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2005</Year><Month>12</Month><Day>29</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2004</Year><Month>4</Month><Day>3</Day><Hour>5</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">15059764</ArticleId><ArticleId IdType="doi">10.1093/treephys/24.6.639</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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