Measurements of 18 O-Pi uptake indicate fast metabolism of phosphate in tree roots.
Identifieur interne : 000849 ( Main/Exploration ); précédent : 000848; suivant : 000850Measurements of 18 O-Pi uptake indicate fast metabolism of phosphate in tree roots.
Auteurs : U. Scheerer [Allemagne] ; F. Netzer [Allemagne] ; A F Bauer [Allemagne] ; C. Herschbach [Allemagne]Source :
- Plant biology (Stuttgart, Germany) [ 1438-8677 ] ; 2019.
Descripteurs français
- KwdFr :
- MESH :
- métabolisme : Arbres, Fagus, Isotopes de l'oxygène, Phosphates, Racines de plante, Radio-isotopes du phosphore.
- Transport biologique.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Oxygen Isotopes, Phosphates, Phosphorus Radioisotopes.
- metabolism : Fagus, Plant Roots, Trees.
- Biological Transport.
Abstract
Phosphorus (P) nutrition of beech ecosystems depends on soil processes, plant internal P cycling and P acquisition. P uptake of trees in the field is currently not validated due to the lack of an experimental approach applicable in natural forests. Application of radiolabelled tracers such as 33 P and 32 P is limited to special research sites and not allowed in natural environments. Moreover, only one stable isotope of P, namely 31 P, exists. One alternative tool to measure P acquisition in the field could be the use of 18 O-labelled 31 P-phosphate (31 P18 O43- ). Phosphate (Pi ) uptake rates calculated from the 18 O enrichment of dried root material after application of 31 Pi18 O43- via nutrient solution was always lower compared to 33 P incorporation, did not show increasing rates of Pi uptake at P deficiency under controlled conditions, and did not reveal seasonal fluctuations in the field. Consequently, a clear correlation between 33 P-based and 18 O-based Pi uptake by roots could not be established. Comparison of Pi uptake rates achieved from 33 P-Pi and 18 O-Pi application led to the conclusion of high Pi metabolism in roots after Pi uptake. The replacement of 18 O by 16 O from water in 18 O-Pi during root influx, but most probably after Pi uptake into roots, due to metabolic activities, indicates high and fast turnover of Pi . Hence, the use of 18 O-Pi as an alternative tool to estimate Pi acquisition of trees in the field must consider the increase of 18 O abundance in root water that was disregarded in dried root material.
DOI: 10.1111/plb.12922
PubMed: 30311347
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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O-P<sub>i</sub>
uptake indicate fast metabolism of phosphate in tree roots.</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological Transport (MeSH)</term>
<term>Fagus (metabolism)</term>
<term>Oxygen Isotopes (metabolism)</term>
<term>Phosphates (metabolism)</term>
<term>Phosphorus Radioisotopes (metabolism)</term>
<term>Plant Roots (metabolism)</term>
<term>Trees (metabolism)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (métabolisme)</term>
<term>Fagus (métabolisme)</term>
<term>Isotopes de l'oxygène (métabolisme)</term>
<term>Phosphates (métabolisme)</term>
<term>Racines de plante (métabolisme)</term>
<term>Radio-isotopes du phosphore (métabolisme)</term>
<term>Transport biologique (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Oxygen Isotopes</term>
<term>Phosphates</term>
<term>Phosphorus Radioisotopes</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Fagus</term>
<term>Plant Roots</term>
<term>Trees</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Arbres</term>
<term>Fagus</term>
<term>Isotopes de l'oxygène</term>
<term>Phosphates</term>
<term>Racines de plante</term>
<term>Radio-isotopes du phosphore</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Biological Transport</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Transport biologique</term>
</keywords>
</textClass>
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<front><div type="abstract" xml:lang="en">Phosphorus (P) nutrition of beech ecosystems depends on soil processes, plant internal P cycling and P acquisition. P uptake of trees in the field is currently not validated due to the lack of an experimental approach applicable in natural forests. Application of radiolabelled tracers such as <sup>33</sup>
P and <sup>32</sup>
P is limited to special research sites and not allowed in natural environments. Moreover, only one stable isotope of P, namely <sup>31</sup>
P, exists. One alternative tool to measure P acquisition in the field could be the use of <sup>18</sup>
O-labelled <sup>31</sup>
P-phosphate (<sup>31</sup>
P<sup>18</sup>
O<sub>4</sub>
<sup>3-</sup>
). Phosphate (P<sub>i</sub>
) uptake rates calculated from the <sup>18</sup>
O enrichment of dried root material after application of <sup>31</sup>
P<sub>i</sub>
<sup>18</sup>
O<sub>4</sub>
<sup>3-</sup>
via nutrient solution was always lower compared to <sup>33</sup>
P incorporation, did not show increasing rates of P<sub>i</sub>
uptake at P deficiency under controlled conditions, and did not reveal seasonal fluctuations in the field. Consequently, a clear correlation between <sup>33</sup>
P-based and <sup>18</sup>
O-based P<sub>i</sub>
uptake by roots could not be established. Comparison of P<sub>i</sub>
uptake rates achieved from <sup>33</sup>
P-P<sub>i</sub>
and <sup>18</sup>
O-P<sub>i</sub>
application led to the conclusion of high P<sub>i</sub>
metabolism in roots after P<sub>i</sub>
uptake. The replacement of <sup>18</sup>
O by <sup>16</sup>
O from water in <sup>18</sup>
O-P<sub>i</sub>
during root influx, but most probably after P<sub>i</sub>
uptake into roots, due to metabolic activities, indicates high and fast turnover of P<sub>i</sub>
. Hence, the use of <sup>18</sup>
O-P<sub>i</sub>
as an alternative tool to estimate P<sub>i</sub>
acquisition of trees in the field must consider the increase of <sup>18</sup>
O abundance in root water that was disregarded in dried root material.</div>
</front>
</TEI>
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<DateCompleted><Year>2019</Year>
<Month>08</Month>
<Day>02</Day>
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<Month>08</Month>
<Day>02</Day>
</DateRevised>
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<JournalIssue CitedMedium="Internet"><Volume>21</Volume>
<Issue>4</Issue>
<PubDate><Year>2019</Year>
<Month>Jul</Month>
</PubDate>
</JournalIssue>
<Title>Plant biology (Stuttgart, Germany)</Title>
<ISOAbbreviation>Plant Biol (Stuttg)</ISOAbbreviation>
</Journal>
<ArticleTitle>Measurements of <sup>18</sup>
O-P<sub>i</sub>
uptake indicate fast metabolism of phosphate in tree roots.</ArticleTitle>
<Pagination><MedlinePgn>565-570</MedlinePgn>
</Pagination>
<ELocationID EIdType="doi" ValidYN="Y">10.1111/plb.12922</ELocationID>
<Abstract><AbstractText>Phosphorus (P) nutrition of beech ecosystems depends on soil processes, plant internal P cycling and P acquisition. P uptake of trees in the field is currently not validated due to the lack of an experimental approach applicable in natural forests. Application of radiolabelled tracers such as <sup>33</sup>
P and <sup>32</sup>
P is limited to special research sites and not allowed in natural environments. Moreover, only one stable isotope of P, namely <sup>31</sup>
P, exists. One alternative tool to measure P acquisition in the field could be the use of <sup>18</sup>
O-labelled <sup>31</sup>
P-phosphate (<sup>31</sup>
P<sup>18</sup>
O<sub>4</sub>
<sup>3-</sup>
). Phosphate (P<sub>i</sub>
) uptake rates calculated from the <sup>18</sup>
O enrichment of dried root material after application of <sup>31</sup>
P<sub>i</sub>
<sup>18</sup>
O<sub>4</sub>
<sup>3-</sup>
via nutrient solution was always lower compared to <sup>33</sup>
P incorporation, did not show increasing rates of P<sub>i</sub>
uptake at P deficiency under controlled conditions, and did not reveal seasonal fluctuations in the field. Consequently, a clear correlation between <sup>33</sup>
P-based and <sup>18</sup>
O-based P<sub>i</sub>
uptake by roots could not be established. Comparison of P<sub>i</sub>
uptake rates achieved from <sup>33</sup>
P-P<sub>i</sub>
and <sup>18</sup>
O-P<sub>i</sub>
application led to the conclusion of high P<sub>i</sub>
metabolism in roots after P<sub>i</sub>
uptake. The replacement of <sup>18</sup>
O by <sup>16</sup>
O from water in <sup>18</sup>
O-P<sub>i</sub>
during root influx, but most probably after P<sub>i</sub>
uptake into roots, due to metabolic activities, indicates high and fast turnover of P<sub>i</sub>
. Hence, the use of <sup>18</sup>
O-P<sub>i</sub>
as an alternative tool to estimate P<sub>i</sub>
acquisition of trees in the field must consider the increase of <sup>18</sup>
O abundance in root water that was disregarded in dried root material.</AbstractText>
<CopyrightInformation>© 2018 German Society for Plant Sciences and The Royal Botanical Society of the Netherlands.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Scheerer</LastName>
<ForeName>U</ForeName>
<Initials>U</Initials>
<AffiliationInfo><Affiliation>Chair of Tree Physiology, Institute of Forest Sciences, Albert-Ludwigs-University Freiburg, Freiburg, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Netzer</LastName>
<ForeName>F</ForeName>
<Initials>F</Initials>
<AffiliationInfo><Affiliation>Chair of Tree Physiology, Institute of Forest Sciences, Albert-Ludwigs-University Freiburg, Freiburg, Germany.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>Chair of Ecosystem Physiology, Institute of Forest Sciences, Albert-Ludwigs-University Freiburg, Freiburg, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Bauer</LastName>
<ForeName>A F</ForeName>
<Initials>AF</Initials>
<AffiliationInfo><Affiliation>Chair of Tree Physiology, Institute of Forest Sciences, Albert-Ludwigs-University Freiburg, Freiburg, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Herschbach</LastName>
<ForeName>C</ForeName>
<Initials>C</Initials>
<Identifier Source="ORCID">https://orcid.org/0000-0003-1930-4576</Identifier>
<AffiliationInfo><Affiliation>Chair of Tree Physiology, Institute of Forest Sciences, Albert-Ludwigs-University Freiburg, Freiburg, Germany.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>Chair of Ecosystem Physiology, Institute of Forest Sciences, Albert-Ludwigs-University Freiburg, Freiburg, Germany.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<GrantList CompleteYN="Y"><Grant><GrantID>HE 3003/6-1 and HE 3003/6-2</GrantID>
<Agency>Deutsche Forschungsgemeinschaft</Agency>
<Country></Country>
</Grant>
</GrantList>
<PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType>
</PublicationTypeList>
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<Month>01</Month>
<Day>25</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo><Country>England</Country>
<MedlineTA>Plant Biol (Stuttg)</MedlineTA>
<NlmUniqueID>101148926</NlmUniqueID>
<ISSNLinking>1435-8603</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList><Chemical><RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D010103">Oxygen Isotopes</NameOfSubstance>
</Chemical>
<Chemical><RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D010710">Phosphates</NameOfSubstance>
</Chemical>
<Chemical><RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D010761">Phosphorus Radioisotopes</NameOfSubstance>
</Chemical>
</ChemicalList>
<MeshHeadingList><MeshHeading><DescriptorName UI="D001692" MajorTopicYN="N">Biological Transport</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D029964" MajorTopicYN="N">Fagus</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D010103" MajorTopicYN="N">Oxygen Isotopes</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D010710" MajorTopicYN="N">Phosphates</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D010761" MajorTopicYN="N">Phosphorus Radioisotopes</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">18O-phosphate uptake</Keyword>
<Keyword MajorTopicYN="N">33P-phosphate uptake</Keyword>
<Keyword MajorTopicYN="N">Fagus sylvatica
</Keyword>
<Keyword MajorTopicYN="N">Populus x canescens
</Keyword>
<Keyword MajorTopicYN="N">Michaelis-Menten kinetics</Keyword>
<Keyword MajorTopicYN="N">excised non-mycorrhizal roots</Keyword>
<Keyword MajorTopicYN="N">field study</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData><History><PubMedPubDate PubStatus="received"><Year>2018</Year>
<Month>07</Month>
<Day>20</Day>
</PubMedPubDate>
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<Month>10</Month>
<Day>07</Day>
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</country>
<region><li>Bade-Wurtemberg</li>
<li>District de Fribourg-en-Brisgau</li>
</region>
<settlement><li>Fribourg-en-Brisgau</li>
</settlement>
</list>
<tree><country name="Allemagne"><region name="Bade-Wurtemberg"><name sortKey="Scheerer, U" sort="Scheerer, U" uniqKey="Scheerer U" first="U" last="Scheerer">U. Scheerer</name>
</region>
<name sortKey="Bauer, A F" sort="Bauer, A F" uniqKey="Bauer A" first="A F" last="Bauer">A F Bauer</name>
<name sortKey="Herschbach, C" sort="Herschbach, C" uniqKey="Herschbach C" first="C" last="Herschbach">C. Herschbach</name>
<name sortKey="Herschbach, C" sort="Herschbach, C" uniqKey="Herschbach C" first="C" last="Herschbach">C. Herschbach</name>
<name sortKey="Netzer, F" sort="Netzer, F" uniqKey="Netzer F" first="F" last="Netzer">F. Netzer</name>
<name sortKey="Netzer, F" sort="Netzer, F" uniqKey="Netzer F" first="F" last="Netzer">F. Netzer</name>
</country>
</tree>
</affiliations>
</record>
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