MycorrhizaeV1, Main, Exploration, bibRecord, 003154

Transport of radiocaesium by arbuscular mycorrhizal fungi to Medicago truncatula under in vitro conditions.

Identifieur interne : 003154 ( Main/Exploration ); précédent : 003153; suivant : 003155

Transport of radiocaesium by arbuscular mycorrhizal fungi to Medicago truncatula under in vitro conditions.

Auteurs : Hervé Dupré De Boulois [Belgique] ; Liesbeth Voets ; Bruno Delvaux ; Iver Jakobsen ; Stéphane Declerck

Source :

Environmental microbiology [ 1462-2912 ] ; 2006.

RBID : pubmed:17014492

Descripteurs français

KwdFr :
- Hyphae (croissance et développement), Hyphae (métabolisme), Medicago truncatula (croissance et développement), Medicago truncatula (microbiologie), Medicago truncatula (métabolisme), Mycelium (croissance et développement), Mycelium (métabolisme), Mycorhizes (croissance et développement), Mycorhizes (métabolisme), Phosphore (métabolisme), Radio-isotopes du césium (métabolisme), Transport biologique (MeSH), Écosystème (MeSH).
MESH :
- croissance et développement : Hyphae, Medicago truncatula, Mycelium, Mycorhizes.
- microbiologie : Medicago truncatula.
- métabolisme : Hyphae, Medicago truncatula, Mycelium, Mycorhizes, Phosphore, Radio-isotopes du césium.
- Transport biologique, Écosystème.

English descriptors

KwdEn :
- Biological Transport (MeSH), Cesium Radioisotopes (metabolism), Ecosystem (MeSH), Hyphae (growth & development), Hyphae (metabolism), Medicago truncatula (growth & development), Medicago truncatula (metabolism), Medicago truncatula (microbiology), Mycelium (growth & development), Mycelium (metabolism), Mycorrhizae (growth & development), Mycorrhizae (metabolism), Phosphorus (metabolism).
MESH :
- chemical , metabolism : Cesium Radioisotopes, Phosphorus.
- growth & development : Hyphae, Medicago truncatula, Mycelium, Mycorrhizae.
- metabolism : Hyphae, Medicago truncatula, Mycelium, Mycorrhizae.
- microbiology : Medicago truncatula.
- Biological Transport, Ecosystem.

Abstract

The capacity of arbuscular mycorrhizal (AM) fungi to take up and translocate radiocaesium (Cs) to their host has been shown using the root-organ culture (ROC) system. However, the absence of photosynthetic tissues, lack of a normal root hormonal balance and incomplete source-sink relationships may bias the bidirectional transfer of elements at the symbiotic interface and complicate transport studies. Accordingly, we developed a novel culture system [i.e. the Arbuscular Mycorrhizal-Plant (AM-P) in vitro culture system], where AM fungi and an autotrophic host plant develop under strict in vitro conditions. With this system, we unambiguously demonstrated the capacity of AM fungi to transport Cs. The extraradical fungal hyphae took up 21.0% of the initial supply of 134Cs. Translocation to the plant represented 83.6% of the 134Cs taken up. Distribution of 134Cs in the host plant was 89.8% in the mycorrhizal roots and 10.2% in the shoot. These results confirm that AM fungi can take up, translocate and accumulate Cs. They further demonstrate unambiguously and for the first time that Cs can be transferred from AM fungi to host tissues. These results suggest a potential involvement of AM fungi in Cs biogeochemical cycle and in plant Cs accumulation.

DOI: 10.1111/j.1462-2920.2006.01070.x
PubMed: 17014492

Affiliations:

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Le document en format XML

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<term>Cesium Radioisotopes (metabolism)</term>
<term>Ecosystem (MeSH)</term>
<term>Hyphae (growth & development)</term>
<term>Hyphae (metabolism)</term>
<term>Medicago truncatula (growth & development)</term>
<term>Medicago truncatula (metabolism)</term>
<term>Medicago truncatula (microbiology)</term>
<term>Mycelium (growth & development)</term>
<term>Mycelium (metabolism)</term>
<term>Mycorrhizae (growth & development)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Phosphorus (metabolism)</term>
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<term>Hyphae (métabolisme)</term>
<term>Medicago truncatula (croissance et développement)</term>
<term>Medicago truncatula (microbiologie)</term>
<term>Medicago truncatula (métabolisme)</term>
<term>Mycelium (croissance et développement)</term>
<term>Mycelium (métabolisme)</term>
<term>Mycorhizes (croissance et développement)</term>
<term>Mycorhizes (métabolisme)</term>
<term>Phosphore (métabolisme)</term>
<term>Radio-isotopes du césium (métabolisme)</term>
<term>Transport biologique (MeSH)</term>
<term>Écosystème (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Cesium Radioisotopes</term>
<term>Phosphorus</term>
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<term>Medicago truncatula</term>
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<term>Mycorrhizae</term>
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<term>Mycorhizes</term>
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<front><div type="abstract" xml:lang="en">The capacity of arbuscular mycorrhizal (AM) fungi to take up and translocate radiocaesium (Cs) to their host has been shown using the root-organ culture (ROC) system. However, the absence of photosynthetic tissues, lack of a normal root hormonal balance and incomplete source-sink relationships may bias the bidirectional transfer of elements at the symbiotic interface and complicate transport studies. Accordingly, we developed a novel culture system [i.e. the Arbuscular Mycorrhizal-Plant (AM-P) in vitro culture system], where AM fungi and an autotrophic host plant develop under strict in vitro conditions. With this system, we unambiguously demonstrated the capacity of AM fungi to transport Cs. The extraradical fungal hyphae took up 21.0% of the initial supply of 134Cs. Translocation to the plant represented 83.6% of the 134Cs taken up. Distribution of 134Cs in the host plant was 89.8% in the mycorrhizal roots and 10.2% in the shoot. These results confirm that AM fungi can take up, translocate and accumulate Cs. They further demonstrate unambiguously and for the first time that Cs can be transferred from AM fungi to host tissues. These results suggest a potential involvement of AM fungi in Cs biogeochemical cycle and in plant Cs accumulation.</div>
</front>
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<Abstract><AbstractText>The capacity of arbuscular mycorrhizal (AM) fungi to take up and translocate radiocaesium (Cs) to their host has been shown using the root-organ culture (ROC) system. However, the absence of photosynthetic tissues, lack of a normal root hormonal balance and incomplete source-sink relationships may bias the bidirectional transfer of elements at the symbiotic interface and complicate transport studies. Accordingly, we developed a novel culture system [i.e. the Arbuscular Mycorrhizal-Plant (AM-P) in vitro culture system], where AM fungi and an autotrophic host plant develop under strict in vitro conditions. With this system, we unambiguously demonstrated the capacity of AM fungi to transport Cs. The extraradical fungal hyphae took up 21.0% of the initial supply of 134Cs. Translocation to the plant represented 83.6% of the 134Cs taken up. Distribution of 134Cs in the host plant was 89.8% in the mycorrhizal roots and 10.2% in the shoot. These results confirm that AM fungi can take up, translocate and accumulate Cs. They further demonstrate unambiguously and for the first time that Cs can be transferred from AM fungi to host tissues. These results suggest a potential involvement of AM fungi in Cs biogeochemical cycle and in plant Cs accumulation.</AbstractText>
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Transport of radiocaesium by arbuscular mycorrhizal fungi to Medicago truncatula under in vitro conditions.

Transport of radiocaesium by arbuscular mycorrhizal fungi to Medicago truncatula under in vitro conditions.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki