Can arbuscular mycorrhizal fungi reduce the growth of agricultural weeds?
Identifieur interne : 002493 ( Main/Exploration ); précédent : 002492; suivant : 002494Can arbuscular mycorrhizal fungi reduce the growth of agricultural weeds?
Auteurs : Rita S L. Veiga [Suisse] ; Jan Jansa ; Emmanuel Frossard ; Marcel G A. Van Der HeijdenSource :
- PloS one [ 1932-6203 ] ; 2011.
Descripteurs français
- KwdFr :
- Agriculture (méthodes), Biomasse (MeSH), Développement des plantes (MeSH), Glomeromycota (métabolisme), Graines (physiologie), Mauvaises herbes (physiologie), Mycorhizes (métabolisme), Phénomènes physiologiques des plantes (MeSH), Plantes (microbiologie), Racines de plante (physiologie), Spores fongiques (physiologie), Spécificité d'espèce (MeSH), Zea mays (microbiologie), Zea mays (physiologie).
- MESH :
- microbiologie : Plantes, Zea mays.
- métabolisme : Glomeromycota, Mycorhizes.
- méthodes : Agriculture.
- physiologie : Graines, Mauvaises herbes, Racines de plante, Spores fongiques, Zea mays.
- Biomasse, Développement des plantes, Phénomènes physiologiques des plantes, Spécificité d'espèce.
English descriptors
- KwdEn :
- Agriculture (methods), Biomass (MeSH), Glomeromycota (metabolism), Mycorrhizae (metabolism), Plant Development (MeSH), Plant Physiological Phenomena (MeSH), Plant Roots (physiology), Plant Weeds (physiology), Plants (microbiology), Seeds (physiology), Species Specificity (MeSH), Spores, Fungal (physiology), Zea mays (microbiology), Zea mays (physiology).
- MESH :
- metabolism : Glomeromycota, Mycorrhizae.
- methods : Agriculture.
- microbiology : Plants, Zea mays.
- physiology : Plant Roots, Plant Weeds, Seeds, Spores, Fungal, Zea mays.
- Biomass, Plant Development, Plant Physiological Phenomena, Species Specificity.
Abstract
BACKGROUND
Arbuscular mycorrhizal fungi (AMF) are known for their beneficial effects on plants. However, there is increasing evidence that some ruderal plants, including several agricultural weeds, respond negatively to AMF colonization. Here, we investigated the effect of AMF on the growth of individual weed species and on weed-crop interactions.
METHODOLOGY/PRINCIPAL FINDINGS
First, under controlled glasshouse conditions, we screened growth responses of nine weed species and three crops to a widespread AMF, Glomus intraradices. None of the weeds screened showed a significant positive mycorrhizal growth response and four weed species were significantly reduced by the AMF (growth responses between -22 and -35%). In a subsequent experiment, we selected three of the negatively responding weed species--Echinochloa crus-galli, Setaria viridis and Solanum nigrum--and analyzed their responses to a combination of three AMF (Glomus intraradices, Glomus mosseae and Glomus claroideum). Finally, we tested whether the presence of a crop (maize) enhanced the suppressive effect of AMF on weeds. We found that the growth of the three selected weed species was also reduced by a combination of AMF and that the presence of maize amplified the negative effect of AMF on the growth of E. crus-galli.
CONCLUSIONS/SIGNIFICANCE
Our results show that AMF can negatively influence the growth of some weed species indicating that AMF have the potential to act as determinants of weed community structure. Furthermore, mycorrhizal weed growth reductions can be amplified in the presence of a crop. Previous studies have shown that AMF provide a number of beneficial ecosystem services. Taken together with our current results, the maintenance and promotion of AMF activity may thereby contribute to sustainable management of agroecosystems. However, in order to further the practical and ecological relevance of our findings, additional experiments should be performed under field conditions.
DOI: 10.1371/journal.pone.0027825
PubMed: 22164216
PubMed Central: PMC3229497
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<term>Plant Weeds (physiology)</term>
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<term>Seeds (physiology)</term>
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<term>Mauvaises herbes (physiologie)</term>
<term>Mycorhizes (métabolisme)</term>
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<term>Plantes (microbiologie)</term>
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<term>Zea mays (physiologie)</term>
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<front><div type="abstract" xml:lang="en"><p><b>BACKGROUND</b>
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<p>Arbuscular mycorrhizal fungi (AMF) are known for their beneficial effects on plants. However, there is increasing evidence that some ruderal plants, including several agricultural weeds, respond negatively to AMF colonization. Here, we investigated the effect of AMF on the growth of individual weed species and on weed-crop interactions.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>METHODOLOGY/PRINCIPAL FINDINGS</b>
</p>
<p>First, under controlled glasshouse conditions, we screened growth responses of nine weed species and three crops to a widespread AMF, Glomus intraradices. None of the weeds screened showed a significant positive mycorrhizal growth response and four weed species were significantly reduced by the AMF (growth responses between -22 and -35%). In a subsequent experiment, we selected three of the negatively responding weed species--Echinochloa crus-galli, Setaria viridis and Solanum nigrum--and analyzed their responses to a combination of three AMF (Glomus intraradices, Glomus mosseae and Glomus claroideum). Finally, we tested whether the presence of a crop (maize) enhanced the suppressive effect of AMF on weeds. We found that the growth of the three selected weed species was also reduced by a combination of AMF and that the presence of maize amplified the negative effect of AMF on the growth of E. crus-galli.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>CONCLUSIONS/SIGNIFICANCE</b>
</p>
<p>Our results show that AMF can negatively influence the growth of some weed species indicating that AMF have the potential to act as determinants of weed community structure. Furthermore, mycorrhizal weed growth reductions can be amplified in the presence of a crop. Previous studies have shown that AMF provide a number of beneficial ecosystem services. Taken together with our current results, the maintenance and promotion of AMF activity may thereby contribute to sustainable management of agroecosystems. However, in order to further the practical and ecological relevance of our findings, additional experiments should be performed under field conditions.</p>
</div>
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<AbstractText Label="METHODOLOGY/PRINCIPAL FINDINGS" NlmCategory="RESULTS">First, under controlled glasshouse conditions, we screened growth responses of nine weed species and three crops to a widespread AMF, Glomus intraradices. None of the weeds screened showed a significant positive mycorrhizal growth response and four weed species were significantly reduced by the AMF (growth responses between -22 and -35%). In a subsequent experiment, we selected three of the negatively responding weed species--Echinochloa crus-galli, Setaria viridis and Solanum nigrum--and analyzed their responses to a combination of three AMF (Glomus intraradices, Glomus mosseae and Glomus claroideum). Finally, we tested whether the presence of a crop (maize) enhanced the suppressive effect of AMF on weeds. We found that the growth of the three selected weed species was also reduced by a combination of AMF and that the presence of maize amplified the negative effect of AMF on the growth of E. crus-galli.</AbstractText>
<AbstractText Label="CONCLUSIONS/SIGNIFICANCE" NlmCategory="CONCLUSIONS">Our results show that AMF can negatively influence the growth of some weed species indicating that AMF have the potential to act as determinants of weed community structure. Furthermore, mycorrhizal weed growth reductions can be amplified in the presence of a crop. Previous studies have shown that AMF provide a number of beneficial ecosystem services. Taken together with our current results, the maintenance and promotion of AMF activity may thereby contribute to sustainable management of agroecosystems. However, in order to further the practical and ecological relevance of our findings, additional experiments should be performed under field conditions.</AbstractText>
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