Phosphate uptake, transport and transfer by the arbuscular mycorrhizal fungus Glomus intraradices is stimulated by increased carbohydrate availability.
Identifieur interne : 003607 ( Main/Corpus ); précédent : 003606; suivant : 003608Phosphate uptake, transport and transfer by the arbuscular mycorrhizal fungus Glomus intraradices is stimulated by increased carbohydrate availability.
Auteurs : Heike Bücking ; Yair Shachar-HillSource :
- The New phytologist [ 0028-646X ] ; 2005.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Glucose, Phosphates, Sucrose.
- metabolism : Daucus carota, Mycorrhizae.
- microbiology : Daucus carota.
- Biological Transport, Active, Time Factors.
Abstract
* The influence of carbohydrate availability to mycorrhizal roots on uptake, metabolism and translocation of phosphate (P) by the fungus was examined in axenic cultures of transformed carrot (Daucus carota) roots in symbiosis with Glomus intraradices. * 14C-labelled carbohydrates, 33P-phosphate and energy dispersive X-ray microanalysis were used to follow the uptake and transfer of C and P in the arbuscular mycorrhizal (AM) symbiosis. * The uptake of P by the extraradical mycelium (ERM) and its translocation to the mycorrhizal roots was stimulated and the metabolic and spatial distribution of P within the fungus were altered in response to increased carbohydrate availability. Sucrose supply resulted in a decrease of polyphosphates and an increased incorporation into phospholipids and other growth-related P pools and also caused elevated cytoplasmic P levels in the intraradical mycelium (IRM) within the root and higher cytoplasmic P levels in the root cortex. * These findings indicate that the uptake of P by the fungus and its transfer to the host is also stimulated by the transfer of carbon from plant to fungus across the mycorrhizal interface.
DOI: 10.1111/j.1469-8137.2004.01274.x
PubMed: 15720701
Links to Exploration step
pubmed:15720701Le document en format XML
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<author><name sortKey="Bucking, Heike" sort="Bucking, Heike" uniqKey="Bucking H" first="Heike" last="Bücking">Heike Bücking</name>
<affiliation><nlm:affiliation>Michigan State University, Department of Plant Biology, East Lansing, MI 48824-1312, USA. bucking@camden.rutgers.edu</nlm:affiliation>
</affiliation>
</author>
<author><name sortKey="Shachar Hill, Yair" sort="Shachar Hill, Yair" uniqKey="Shachar Hill Y" first="Yair" last="Shachar-Hill">Yair Shachar-Hill</name>
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<affiliation><nlm:affiliation>Michigan State University, Department of Plant Biology, East Lansing, MI 48824-1312, USA. bucking@camden.rutgers.edu</nlm:affiliation>
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<author><name sortKey="Shachar Hill, Yair" sort="Shachar Hill, Yair" uniqKey="Shachar Hill Y" first="Yair" last="Shachar-Hill">Yair Shachar-Hill</name>
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<series><title level="j">The New phytologist</title>
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<imprint><date when="2005" type="published">2005</date>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological Transport, Active (MeSH)</term>
<term>Daucus carota (metabolism)</term>
<term>Daucus carota (microbiology)</term>
<term>Glucose (metabolism)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Phosphates (metabolism)</term>
<term>Sucrose (metabolism)</term>
<term>Time Factors (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Glucose</term>
<term>Phosphates</term>
<term>Sucrose</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Daucus carota</term>
<term>Mycorrhizae</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Daucus carota</term>
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<keywords scheme="MESH" xml:lang="en"><term>Biological Transport, Active</term>
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<front><div type="abstract" xml:lang="en">* The influence of carbohydrate availability to mycorrhizal roots on uptake, metabolism and translocation of phosphate (P) by the fungus was examined in axenic cultures of transformed carrot (Daucus carota) roots in symbiosis with Glomus intraradices. * 14C-labelled carbohydrates, 33P-phosphate and energy dispersive X-ray microanalysis were used to follow the uptake and transfer of C and P in the arbuscular mycorrhizal (AM) symbiosis. * The uptake of P by the extraradical mycelium (ERM) and its translocation to the mycorrhizal roots was stimulated and the metabolic and spatial distribution of P within the fungus were altered in response to increased carbohydrate availability. Sucrose supply resulted in a decrease of polyphosphates and an increased incorporation into phospholipids and other growth-related P pools and also caused elevated cytoplasmic P levels in the intraradical mycelium (IRM) within the root and higher cytoplasmic P levels in the root cortex. * These findings indicate that the uptake of P by the fungus and its transfer to the host is also stimulated by the transfer of carbon from plant to fungus across the mycorrhizal interface.</div>
</front>
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<DateRevised><Year>2020</Year>
<Month>09</Month>
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<Title>The New phytologist</Title>
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<ArticleTitle>Phosphate uptake, transport and transfer by the arbuscular mycorrhizal fungus Glomus intraradices is stimulated by increased carbohydrate availability.</ArticleTitle>
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<Abstract><AbstractText>* The influence of carbohydrate availability to mycorrhizal roots on uptake, metabolism and translocation of phosphate (P) by the fungus was examined in axenic cultures of transformed carrot (Daucus carota) roots in symbiosis with Glomus intraradices. * 14C-labelled carbohydrates, 33P-phosphate and energy dispersive X-ray microanalysis were used to follow the uptake and transfer of C and P in the arbuscular mycorrhizal (AM) symbiosis. * The uptake of P by the extraradical mycelium (ERM) and its translocation to the mycorrhizal roots was stimulated and the metabolic and spatial distribution of P within the fungus were altered in response to increased carbohydrate availability. Sucrose supply resulted in a decrease of polyphosphates and an increased incorporation into phospholipids and other growth-related P pools and also caused elevated cytoplasmic P levels in the intraradical mycelium (IRM) within the root and higher cytoplasmic P levels in the root cortex. * These findings indicate that the uptake of P by the fungus and its transfer to the host is also stimulated by the transfer of carbon from plant to fungus across the mycorrhizal interface.</AbstractText>
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<ChemicalList><Chemical><RegistryNumber>0</RegistryNumber>
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<Chemical><RegistryNumber>57-50-1</RegistryNumber>
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<MeshHeading><DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D010710" MajorTopicYN="N">Phosphates</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
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<MeshHeading><DescriptorName UI="D013395" MajorTopicYN="N">Sucrose</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
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<MeshHeading><DescriptorName UI="D013997" MajorTopicYN="N">Time Factors</DescriptorName>
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