Roles of arbuscular mycorrhizas in plant nutrition and growth: new paradigms from cellular to ecosystem scales.
Identifieur interne : 002384 ( Main/Corpus ); précédent : 002383; suivant : 002385Roles of arbuscular mycorrhizas in plant nutrition and growth: new paradigms from cellular to ecosystem scales.
Auteurs : Sally E. Smith ; F Andrew SmithSource :
- Annual review of plant biology [ 1545-2123 ] ; 2011.
English descriptors
- KwdEn :
- Ecosystem (MeSH), Hyphae (metabolism), Models, Biological (MeSH), Mycorrhizae (metabolism), Mycorrhizae (physiology), Nitrogen (metabolism), Phosphorus (metabolism), Plant Development (MeSH), Plant Roots (growth & development), Plant Roots (metabolism), Plant Roots (microbiology), Plants (metabolism), Plants (microbiology), Signal Transduction (MeSH), Symbiosis (MeSH).
- MESH :
- chemical , metabolism : Nitrogen, Phosphorus.
- growth & development : Plant Roots.
- metabolism : Hyphae, Mycorrhizae, Plant Roots, Plants.
- microbiology : Plant Roots, Plants.
- physiology : Mycorrhizae.
- Ecosystem, Models, Biological, Plant Development, Signal Transduction, Symbiosis.
Abstract
Root systems of most land plants form arbuscular mycorrhizal (AM) symbioses in the field, and these contribute to nutrient uptake. AM roots have two pathways for nutrient absorption, directly through the root epidermis and root hairs and via AM fungal hyphae into root cortical cells, where arbuscules or hyphal coils provide symbiotic interfaces. New physiological and molecular evidence shows that for phosphorus the mycorrhizal pathway (MP) is operational regardless of plant growth responses (positive or negative). Amounts delivered cannot be determined from plant nutrient contents because when responses are negative the contribution of the direct pathway (DP) is reduced. Nitrogen (N) is also delivered to roots via an MP, but the contribution to total N requirement and the costs to the plant are not clear. The functional interplay between activities of the DP and MP has important implications for consideration of AM symbioses in ecological, agronomic, and evolutionary contexts.
DOI: 10.1146/annurev-arplant-042110-103846
PubMed: 21391813
Links to Exploration step
pubmed:21391813Le document en format XML
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<author><name sortKey="Smith, Sally E" sort="Smith, Sally E" uniqKey="Smith S" first="Sally E" last="Smith">Sally E. Smith</name>
<affiliation><nlm:affiliation>Soils Group, School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Adelaide, South Australia 5005, Australia. sally.smith@adelaide.edu.au</nlm:affiliation>
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<author><name sortKey="Smith, F Andrew" sort="Smith, F Andrew" uniqKey="Smith F" first="F Andrew" last="Smith">F Andrew Smith</name>
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<series><title level="j">Annual review of plant biology</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ecosystem (MeSH)</term>
<term>Hyphae (metabolism)</term>
<term>Models, Biological (MeSH)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Mycorrhizae (physiology)</term>
<term>Nitrogen (metabolism)</term>
<term>Phosphorus (metabolism)</term>
<term>Plant Development (MeSH)</term>
<term>Plant Roots (growth & development)</term>
<term>Plant Roots (metabolism)</term>
<term>Plant Roots (microbiology)</term>
<term>Plants (metabolism)</term>
<term>Plants (microbiology)</term>
<term>Signal Transduction (MeSH)</term>
<term>Symbiosis (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Nitrogen</term>
<term>Phosphorus</term>
</keywords>
<keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Plant Roots</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Hyphae</term>
<term>Mycorrhizae</term>
<term>Plant Roots</term>
<term>Plants</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Roots</term>
<term>Plants</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Mycorrhizae</term>
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<keywords scheme="MESH" xml:lang="en"><term>Ecosystem</term>
<term>Models, Biological</term>
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<front><div type="abstract" xml:lang="en">Root systems of most land plants form arbuscular mycorrhizal (AM) symbioses in the field, and these contribute to nutrient uptake. AM roots have two pathways for nutrient absorption, directly through the root epidermis and root hairs and via AM fungal hyphae into root cortical cells, where arbuscules or hyphal coils provide symbiotic interfaces. New physiological and molecular evidence shows that for phosphorus the mycorrhizal pathway (MP) is operational regardless of plant growth responses (positive or negative). Amounts delivered cannot be determined from plant nutrient contents because when responses are negative the contribution of the direct pathway (DP) is reduced. Nitrogen (N) is also delivered to roots via an MP, but the contribution to total N requirement and the costs to the plant are not clear. The functional interplay between activities of the DP and MP has important implications for consideration of AM symbioses in ecological, agronomic, and evolutionary contexts.</div>
</front>
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<DateRevised><Year>2013</Year>
<Month>11</Month>
<Day>21</Day>
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<Title>Annual review of plant biology</Title>
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<Abstract><AbstractText>Root systems of most land plants form arbuscular mycorrhizal (AM) symbioses in the field, and these contribute to nutrient uptake. AM roots have two pathways for nutrient absorption, directly through the root epidermis and root hairs and via AM fungal hyphae into root cortical cells, where arbuscules or hyphal coils provide symbiotic interfaces. New physiological and molecular evidence shows that for phosphorus the mycorrhizal pathway (MP) is operational regardless of plant growth responses (positive or negative). Amounts delivered cannot be determined from plant nutrient contents because when responses are negative the contribution of the direct pathway (DP) is reduced. Nitrogen (N) is also delivered to roots via an MP, but the contribution to total N requirement and the costs to the plant are not clear. The functional interplay between activities of the DP and MP has important implications for consideration of AM symbioses in ecological, agronomic, and evolutionary contexts.</AbstractText>
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<QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName>
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<MeshHeading><DescriptorName UI="D015398" MajorTopicYN="N">Signal Transduction</DescriptorName>
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<MeshHeading><DescriptorName UI="D013559" MajorTopicYN="N">Symbiosis</DescriptorName>
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