Influence of different mineral nitrogen sources (NO3(-)-N vs. NH4(+)-N) on arbuscular mycorrhiza development and N transfer in a Glomus intraradices-cowpea symbiosis.
Identifieur interne : 001F11 ( Main/Corpus ); précédent : 001F10; suivant : 001F12Influence of different mineral nitrogen sources (NO3(-)-N vs. NH4(+)-N) on arbuscular mycorrhiza development and N transfer in a Glomus intraradices-cowpea symbiosis.
Auteurs : Benard Ngwene ; Elke Gabriel ; Eckhard GeorgeSource :
- Mycorrhiza [ 1432-1890 ] ; 2013.
English descriptors
- KwdEn :
- Ammonia (metabolism), Fabaceae (metabolism), Fabaceae (microbiology), Glomeromycota (metabolism), Glomeromycota (physiology), Mycelium (metabolism), Mycorrhizae (metabolism), Mycorrhizae (physiology), Nitrates (metabolism), Nitrogen (metabolism), Plant Roots (metabolism), Plant Roots (microbiology), Symbiosis (MeSH).
- MESH :
- chemical , metabolism : Ammonia, Nitrates, Nitrogen.
- metabolism : Fabaceae, Glomeromycota, Mycelium, Mycorrhizae, Plant Roots.
- microbiology : Fabaceae, Plant Roots.
- physiology : Glomeromycota, Mycorrhizae.
- Symbiosis.
Abstract
Labeled nitrogen ((15)N) was applied to a soil-based substrate in order to study the uptake of N by Glomus intraradices extraradical mycelium (ERM) from different mineral N (NO(3)(-) vs. NH(4)(+)) sources and the subsequent transfer to cowpea plants. Fungal compartments (FCs) were placed within the plant growth substrate to simulate soil patches containing root-inaccessible, but mycorrhiza-accessible, N. The fungus was able to take up both N-forms, NO(3)(-) and NH(4)(+). However, the amount of N transferred from the FC to the plant was higher when NO(3)(-) was applied to the FC. In contrast, analysis of ERM harvested from the FC showed a higher (15)N enrichment when the FC was supplied with (15)NH(4)(+) compared with (15)NO(3)(-). The (15)N shoot/root ratio of plants supplied with (15)NO(3)(-) was much higher than that of plants supplied with (15)NH(4)(+), indicative of a faster transfer of (15)NO(3)(-) from the root to the shoot and a higher accumulation of (15)NH (4)(+) in the root and/or intraradical mycelium. It is concluded that hyphae of the arbuscular mycorrhizal fungus may absorb NH(4)(+) preferentially over NO(3)(-) but that export of N from the hyphae to the root and shoot may be greater following NO(3)(-) uptake. The need for NH(4)(+) to be assimilated into organically bound N prior to transport into the plant is discussed.
DOI: 10.1007/s00572-012-0453-z
PubMed: 22810583
PubMed Central: PMC3555231
Links to Exploration step
pubmed:22810583Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Influence of different mineral nitrogen sources (NO3(-)-N vs. NH4(+)-N) on arbuscular mycorrhiza development and N transfer in a Glomus intraradices-cowpea symbiosis.</title>
<author><name sortKey="Ngwene, Benard" sort="Ngwene, Benard" uniqKey="Ngwene B" first="Benard" last="Ngwene">Benard Ngwene</name>
<affiliation><nlm:affiliation>Leibniz-Institute of Vegetable and Ornamental Crops Grossbeeren and Erfurt e.V., Theodor-Echtermeyer-Weg 1, 14979 Grossbeeren, Germany. ngwene@igzev.de</nlm:affiliation>
</affiliation>
</author>
<author><name sortKey="Gabriel, Elke" sort="Gabriel, Elke" uniqKey="Gabriel E" first="Elke" last="Gabriel">Elke Gabriel</name>
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<author><name sortKey="George, Eckhard" sort="George, Eckhard" uniqKey="George E" first="Eckhard" last="George">Eckhard George</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Influence of different mineral nitrogen sources (NO3(-)-N vs. NH4(+)-N) on arbuscular mycorrhiza development and N transfer in a Glomus intraradices-cowpea symbiosis.</title>
<author><name sortKey="Ngwene, Benard" sort="Ngwene, Benard" uniqKey="Ngwene B" first="Benard" last="Ngwene">Benard Ngwene</name>
<affiliation><nlm:affiliation>Leibniz-Institute of Vegetable and Ornamental Crops Grossbeeren and Erfurt e.V., Theodor-Echtermeyer-Weg 1, 14979 Grossbeeren, Germany. ngwene@igzev.de</nlm:affiliation>
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<author><name sortKey="Gabriel, Elke" sort="Gabriel, Elke" uniqKey="Gabriel E" first="Elke" last="Gabriel">Elke Gabriel</name>
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<author><name sortKey="George, Eckhard" sort="George, Eckhard" uniqKey="George E" first="Eckhard" last="George">Eckhard George</name>
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<series><title level="j">Mycorrhiza</title>
<idno type="eISSN">1432-1890</idno>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ammonia (metabolism)</term>
<term>Fabaceae (metabolism)</term>
<term>Fabaceae (microbiology)</term>
<term>Glomeromycota (metabolism)</term>
<term>Glomeromycota (physiology)</term>
<term>Mycelium (metabolism)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Mycorrhizae (physiology)</term>
<term>Nitrates (metabolism)</term>
<term>Nitrogen (metabolism)</term>
<term>Plant Roots (metabolism)</term>
<term>Plant Roots (microbiology)</term>
<term>Symbiosis (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Ammonia</term>
<term>Nitrates</term>
<term>Nitrogen</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Fabaceae</term>
<term>Glomeromycota</term>
<term>Mycelium</term>
<term>Mycorrhizae</term>
<term>Plant Roots</term>
</keywords>
<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Fabaceae</term>
<term>Plant Roots</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Glomeromycota</term>
<term>Mycorrhizae</term>
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<keywords scheme="MESH" xml:lang="en"><term>Symbiosis</term>
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<front><div type="abstract" xml:lang="en">Labeled nitrogen ((15)N) was applied to a soil-based substrate in order to study the uptake of N by Glomus intraradices extraradical mycelium (ERM) from different mineral N (NO(3)(-) vs. NH(4)(+)) sources and the subsequent transfer to cowpea plants. Fungal compartments (FCs) were placed within the plant growth substrate to simulate soil patches containing root-inaccessible, but mycorrhiza-accessible, N. The fungus was able to take up both N-forms, NO(3)(-) and NH(4)(+). However, the amount of N transferred from the FC to the plant was higher when NO(3)(-) was applied to the FC. In contrast, analysis of ERM harvested from the FC showed a higher (15)N enrichment when the FC was supplied with (15)NH(4)(+) compared with (15)NO(3)(-). The (15)N shoot/root ratio of plants supplied with (15)NO(3)(-) was much higher than that of plants supplied with (15)NH(4)(+), indicative of a faster transfer of (15)NO(3)(-) from the root to the shoot and a higher accumulation of (15)NH (4)(+) in the root and/or intraradical mycelium. It is concluded that hyphae of the arbuscular mycorrhizal fungus may absorb NH(4)(+) preferentially over NO(3)(-) but that export of N from the hyphae to the root and shoot may be greater following NO(3)(-) uptake. The need for NH(4)(+) to be assimilated into organically bound N prior to transport into the plant is discussed.</div>
</front>
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<DateRevised><Year>2018</Year>
<Month>11</Month>
<Day>13</Day>
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<Title>Mycorrhiza</Title>
<ISOAbbreviation>Mycorrhiza</ISOAbbreviation>
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<ArticleTitle>Influence of different mineral nitrogen sources (NO3(-)-N vs. NH4(+)-N) on arbuscular mycorrhiza development and N transfer in a Glomus intraradices-cowpea symbiosis.</ArticleTitle>
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<Abstract><AbstractText>Labeled nitrogen ((15)N) was applied to a soil-based substrate in order to study the uptake of N by Glomus intraradices extraradical mycelium (ERM) from different mineral N (NO(3)(-) vs. NH(4)(+)) sources and the subsequent transfer to cowpea plants. Fungal compartments (FCs) were placed within the plant growth substrate to simulate soil patches containing root-inaccessible, but mycorrhiza-accessible, N. The fungus was able to take up both N-forms, NO(3)(-) and NH(4)(+). However, the amount of N transferred from the FC to the plant was higher when NO(3)(-) was applied to the FC. In contrast, analysis of ERM harvested from the FC showed a higher (15)N enrichment when the FC was supplied with (15)NH(4)(+) compared with (15)NO(3)(-). The (15)N shoot/root ratio of plants supplied with (15)NO(3)(-) was much higher than that of plants supplied with (15)NH(4)(+), indicative of a faster transfer of (15)NO(3)(-) from the root to the shoot and a higher accumulation of (15)NH (4)(+) in the root and/or intraradical mycelium. It is concluded that hyphae of the arbuscular mycorrhizal fungus may absorb NH(4)(+) preferentially over NO(3)(-) but that export of N from the hyphae to the root and shoot may be greater following NO(3)(-) uptake. The need for NH(4)(+) to be assimilated into organically bound N prior to transport into the plant is discussed.</AbstractText>
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<ForeName>Benard</ForeName>
<Initials>B</Initials>
<AffiliationInfo><Affiliation>Leibniz-Institute of Vegetable and Ornamental Crops Grossbeeren and Erfurt e.V., Theodor-Echtermeyer-Weg 1, 14979 Grossbeeren, Germany. ngwene@igzev.de</Affiliation>
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<Author ValidYN="Y"><LastName>George</LastName>
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<Language>eng</Language>
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