Shading decreases plant carbon preferential allocation towards the most beneficial mycorrhizal mutualist.
Identifieur interne : 001412 ( Main/Exploration ); précédent : 001411; suivant : 001413Shading decreases plant carbon preferential allocation towards the most beneficial mycorrhizal mutualist.
Auteurs : Chaoyuan Zheng [États-Unis] ; Baoming Ji ; Junling Zhang ; Fusuo Zhang ; James D. BeverSource :
- The New phytologist [ 1469-8137 ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Allium.
- microbiologie : Allium.
- métabolisme : Carbone.
- physiologie : Allium, Glomeromycota, Mycorhizes.
- Phosphore, Radio-isotopes du carbone, Symbiose.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Carbon.
- growth & development : Allium.
- microbiology : Allium.
- physiology : Allium, Glomeromycota, Mycorrhizae.
- chemical : Carbon Radioisotopes, Phosphorus, Symbiosis.
Abstract
Preferential allocation towards the most beneficial mutualist could maintain mycorrhizal mutualism. Context dependence of preferential allocation could then determine environmental patterns in abundance of mycorrhizal mutualists. We assessed the preferential allocation of carbon (C) and differential phosphorus (P) uptake across four light treatments between the host plant Allium vineale and two arbuscular mycorrhizal (AM) fungi within a split-root system. The ratios of C allocation and P uptake between the beneficial and nonbeneficial AM fungi were measured using isotopic labelling. Allium vineale preferentially allocated more C towards roots infected with the most beneficial AM fungus in high light and, in return, received more P from the beneficial fungus. Preferential allocation declined with shading, as A. vineale allocated 25% of labelled C to roots infected with beneficial AM fungi in high light, but only 15% with shading, a similar percentage to that allocated to roots infected with nonbeneficial fungi regardless of shading. Our findings demonstrate that plant preferential allocation towards the most beneficial mycorrhizal mutualist depends upon above-ground resources, suggesting that the abundance of beneficial mycorrhizal fungi will increase with amount of above-ground resources, with implications for mycorrhizal mediation of plant productivity with anthropogenic change.
DOI: 10.1111/nph.13025
PubMed: 25243653
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<term>Allium (microbiology)</term>
<term>Allium (physiology)</term>
<term>Carbon (metabolism)</term>
<term>Carbon Radioisotopes (MeSH)</term>
<term>Glomeromycota (physiology)</term>
<term>Mycorrhizae (physiology)</term>
<term>Phosphorus (MeSH)</term>
<term>Symbiosis (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Allium (croissance et développement)</term>
<term>Allium (microbiologie)</term>
<term>Allium (physiologie)</term>
<term>Carbone (métabolisme)</term>
<term>Glomeromycota (physiologie)</term>
<term>Mycorhizes (physiologie)</term>
<term>Phosphore (MeSH)</term>
<term>Radio-isotopes du carbone (MeSH)</term>
<term>Symbiose (MeSH)</term>
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<keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Allium</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Allium</term>
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<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Carbone</term>
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<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Allium</term>
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<term>Mycorhizes</term>
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<term>Glomeromycota</term>
<term>Mycorrhizae</term>
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<term>Phosphorus</term>
<term>Symbiosis</term>
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<keywords scheme="MESH" xml:lang="fr"><term>Phosphore</term>
<term>Radio-isotopes du carbone</term>
<term>Symbiose</term>
</keywords>
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<front><div type="abstract" xml:lang="en">Preferential allocation towards the most beneficial mutualist could maintain mycorrhizal mutualism. Context dependence of preferential allocation could then determine environmental patterns in abundance of mycorrhizal mutualists. We assessed the preferential allocation of carbon (C) and differential phosphorus (P) uptake across four light treatments between the host plant Allium vineale and two arbuscular mycorrhizal (AM) fungi within a split-root system. The ratios of C allocation and P uptake between the beneficial and nonbeneficial AM fungi were measured using isotopic labelling. Allium vineale preferentially allocated more C towards roots infected with the most beneficial AM fungus in high light and, in return, received more P from the beneficial fungus. Preferential allocation declined with shading, as A. vineale allocated 25% of labelled C to roots infected with beneficial AM fungi in high light, but only 15% with shading, a similar percentage to that allocated to roots infected with nonbeneficial fungi regardless of shading. Our findings demonstrate that plant preferential allocation towards the most beneficial mycorrhizal mutualist depends upon above-ground resources, suggesting that the abundance of beneficial mycorrhizal fungi will increase with amount of above-ground resources, with implications for mycorrhizal mediation of plant productivity with anthropogenic change.</div>
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<Abstract><AbstractText>Preferential allocation towards the most beneficial mutualist could maintain mycorrhizal mutualism. Context dependence of preferential allocation could then determine environmental patterns in abundance of mycorrhizal mutualists. We assessed the preferential allocation of carbon (C) and differential phosphorus (P) uptake across four light treatments between the host plant Allium vineale and two arbuscular mycorrhizal (AM) fungi within a split-root system. The ratios of C allocation and P uptake between the beneficial and nonbeneficial AM fungi were measured using isotopic labelling. Allium vineale preferentially allocated more C towards roots infected with the most beneficial AM fungus in high light and, in return, received more P from the beneficial fungus. Preferential allocation declined with shading, as A. vineale allocated 25% of labelled C to roots infected with beneficial AM fungi in high light, but only 15% with shading, a similar percentage to that allocated to roots infected with nonbeneficial fungi regardless of shading. Our findings demonstrate that plant preferential allocation towards the most beneficial mycorrhizal mutualist depends upon above-ground resources, suggesting that the abundance of beneficial mycorrhizal fungi will increase with amount of above-ground resources, with implications for mycorrhizal mediation of plant productivity with anthropogenic change.</AbstractText>
<CopyrightInformation>© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.</CopyrightInformation>
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