The Experts below are selected from a list of 2073 Experts worldwide ranked by ideXlab platform
Mitsuro Hyakumachi - One of the best experts on this subject based on the ideXlab platform.
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involvement of the salicylic acid signaling pathway in the systemic resistance induced in arabidopsis by plant growth promoting fungus Fusarium equiseti gf19 1
Journal of Oleo Science, 2013Co-Authors: Hanae Kojima, Md Motaher Hossain, Mayumi Kubota, Mitsuro HyakumachiAbstract:Plant growth-promoting fungi (PGPF) are effective biocontrol agents for a number of soil-borne diseases and are known for their ability to trigger induced systemic resistance (ISR). In this study, we investigated the mechanisms triggered by PGPF Fusarium equiseti GF19-1, which is known to increase pathogen resistance in plants, by using GF19-1 spores and the culture filtrate (CF) to treat the roots of Arabidopsis thaliana. Subsequently, the leaves were challenged with Pseudomonas syringae pv tomato DC3000 (Pst) bacteria. Arabidopsis plants treated with GF19-1 spores or the CF elicited ISR against the Pst pathogen, resulting in a restriction of disease severity and suppression of pathogen proliferation. Examination of ISR in various signaling mutants and transgenic plants showed that GF19-1-induced protection was observed in the jasmonate response mutant jar1 and the ethylene response mutant etr1, whereas it was blocked in Arabidopsis plants expressing the NahG transgene or demonstrating a disruption of the NPR1 gene (npr1). Analysis of systemic gene expression revealed that GF19-1 modulates the expression of salicylic acid (SA)-responsive PR-1, PR-2, and PR-5 genes. Moreover, transient accumulation of SA was observed in GF19-1-treated plant, whereas the level was further enhanced after Pst infection of GF19-1-pretreated plants, indicating that accumulation of SA was potentiated when Arabidopsis plants were primed for disease resistance by GF19-1. In conclusion, these findings imply that the induced protective effect conferred by F. equiseti GF19-1 against the leaf pathogen Pst requires responsiveness to an SA-dependent pathway.
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the plant growth promoting fungus Fusarium equiseti and the arbuscular mycorrhizal fungus glomus mosseae induce systemic resistance against cucumber mosaic virus in cucumber plants
Plant and Soil, 2012Co-Authors: Mohsen Mohamed Elsharkawy, Hideki Takahashi, Masafumi Shimizu, Mitsuro HyakumachiAbstract:Aims The aim of this study was to elucidate the effects of the interactions between the arbuscular mycorrhizal fungus Glomus mosseae (Gm) and Fusarium equiseti GF18-3 on cucumber growth and the biocontrol of the yellow strain of Cucumber mosaic virus (CMV-Y).
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the plant growth promoting fungus Fusarium equiseti and the arbuscular mycorrhizal fungus glomus mosseae stimulate plant growth and reduce severity of anthracnose and damping off diseases in cucumber cucumis sativus seedlings
Annals of Applied Biology, 2011Co-Authors: M G B Saldajeno, Mitsuro HyakumachiAbstract:To alleviate the environmental contamination due to persistent chemical usage, approaches to integrated pest management were conceived. In this perspective, microbe-microbe interactions such as mycorrhizal relationships with other soil microbiota in the rhizosphere like the plant growth-promoting fungi (PGPF) are particularly important. Better understanding of the interactions between beneficial microbial groups is imperative in the identification of possible synergistic or antagonistic effects to improve their practical usage as biocontrol agents or biofertilizers. In this study, the consequence of co-inoculation of the arbuscular mycorrhizal fungus (AMF) Glomus mosseae (Gm) and the PGPF Fusarium equiseti (isolates GF18-3 and GF19-1) in terms of plant growth enhancement, root and rhizosphere colonisation, and development of anthracnose (Colletotrichum orbiculare) and damping-off (Rhizoctonia solani AG-4) diseases in cucumber plants was investigated under controlled conditions. The amendment of either GF18-3 or GF19-1 singly or in combination with Gm indicated a general tendency to significantly enhance the shoot dry weight (SDW) of cucumber plants at 4 weeks after planting (WAP). Similarly, Gm alone significantly enhanced SDW at 4 WAP. Gm showed a tendency to depress root colonisation by F. equiseti but such antagonistic effect was not observed in the rhizosphere soil. Both GF18-3 and GF19-1 significantly reduced percent root colonisation of Gm. However, these general tendencies may vary with the inoculum densities of AMF and PGPF. Both F. equiseti and Gm inoculated singly significantly increased percent of protection against anthracnose, but the combined inoculation was more effective in controlling the disease compared to single inoculation. The inoculation of the cucumber seedlings with GF18-3, GF19-1 or Gm, 6 or 12 days prior to damping-off pathogen inoculation, increased percent of protection against damping-off disease. This study shows that the co-inoculation of F. equiseti and Gm resulted in additive effect on the suppression of anthracnose disease in cucumber.
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biological control of Fusarium wilt of tomato with Fusarium equiseti gf191 in both rock wool and soil systems
Biocontrol, 2011Co-Authors: Hayato Horinouchi, A Muslim, Hideki Watanabe, Yoshihiro Taguchi, Mitsuro HyakumachiAbstract:The plant growth-promoting fungus (PGPF) Fusarium equiseti GF191 was tested for its ability to control Fusarium wilt of tomato (FWT) caused by Fusarium oxysporum f. sp. lycopersici (FOL) in both a hydroponic rock wool and soil system. F. equiseti effectively controlled FWT, with protective effects based on disease severity of 66.7–88.6% in four experiments. The numbers of colony-forming units of FOL per gram fresh weight of stems were significantly reduced (P < 0.05) in plants treated with F. equiseti. Stem extracts from F. equiseti-treated and pathogen-challenged plants significantly inhibited the germination and germ-tube length of FOL microconidia and the production of FOL budding-cells. Tomatine content in tomato stems treated with F. equiseti was significantly increased compared with the non-treated control.
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biocontrol of Fusarium wilt of spinach by the plant growth promoting fungus Fusarium equiseti gf183
Journal of Plant Pathology, 2010Co-Authors: Hayato Horinouchi, A Muslim, Mitsuro HyakumachiAbstract:The plant growth promoting fungus Fusarium equiseti GF183 effectively controlled Fusarium wilt of spinach caused by Fusarium oxysporum f. sp. spinaciae in transplanting systems using paper pots. Reduction in disease severity ranged from 43.5 to 91.8%. Double application of F. equiseti GF183 increased the protective effects. The number of colony-forming units of F. oxysporum f. sp. spinaciae per gram fresh weight of roots was significantly reduced (P<0.05) in plants treated with F. equiseti. Root extracts from both F. equiseti-treated plants and F. equiseti and pathogen-treated plants significantly inhibited new production of budding-cells of F. oxysporum f. sp. spinaciae.
Luis Vicente Lopezllorca - One of the best experts on this subject based on the ideXlab platform.
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colonisation of barley roots by endophytic Fusarium equiseti and pochonia chlamydosporia effects on plant growth and disease
Annals of Applied Biology, 2009Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Laura Cristina Rosso, Aurelio Ciancio, Luis Vicente LopezllorcaAbstract:Colonisation of plant roots by endophytic fungi may confer benefits to the host such as protection against abiotic or biotic stresses or plant growth promotion. The exploitation of these properties is of great relevance at an applied level, either to increase yields of agricultural crops or in reforestation activities. Fusarium equiseti is a naturally occurring endophyte in vegetation under stress in Mediterranean ecosystems. Pochonia chlamydosporia is a nematode egg- parasitic fungus with a worldwide distribution. Both fungi have the capacity to colonise roots of non-host plants endophytically and to protect them against phytopathogenic fungi under laboratory conditions. The aim of this study was to evaluate the root population dynamics of these fungi under non-axenic practical conditions. Both fungal species were inoculated into barley roots. Their presence in roots and effects on plant growth and incidence of disease caused by the pathogen Gaeumannomyces graminis var. tritici were monitored periodically. Both fungi colonised barley roots endophytically over the duration of the experiment and competed with other existing fungal root colonisers. Furthermore, colonisation of roots by P. chlamydosporia promoted plant growth. Although a clear suppressive effect on disease could not be detected, F. equiseti isolates reduced the mean root lesion length caused by the pathogen. Results of this work suggest that both F. equiseti and P. chlamydosporia are long-term root endophytes that confer beneficial effects to the host plant.
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real time pcr quantification and live cell imaging of endophytic colonization of barley hordeum vulgare roots by Fusarium equiseti and pochonia chlamydosporia
New Phytologist, 2009Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Nicholas J Talbot, Luis Vicente LopezllorcaAbstract:*New tools were developed for the study of the endophytic development of the fungal species Fusarium equiseti and Pochonia chlamydosporia in barley (Hordeum vulgare) roots. These were applied to monitor the host colonization patterns of these potential candidates for biocontrol of root pathogens. * Molecular beacons specific for either F. equiseti or P. chlamydosporia were designed and used in real-time polymerase chain reaction (PCR) quantification of fungal populations in roots. Genetic transformation of isolates with the green fluorescent protein (GFP) gene was carried out using an Agrobacterium tumefaciens-mediated transformation protocol, and spatial patterns of root colonization were investigated by laser confocal microscopy. * Quantification of endophytes by real-time PCR in roots of barley gave similar results for all fungi, and was more accurate than culturing methods. Conversely, monitoring of root colonization by GFP-expressing transformants showed differences in the endophytic behaviours of the two species, and provided evidence of a plant response against endophyte colonization. * Both F. equiseti and P. chlamydosporia colonized barley roots endophytically, escaping attempts by the host to prevent fungal growth within root tissues. This strongly supports a balanced antagonism between the virulence of the colonizing endophyte and the plant defence response. Development of real-time PCR techniques and GFP transformants of these fungal species will facilitate future work to determine their biocontrol capacity.
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colonization of barley roots by endophytic fungi and their reduction of take all caused by gaeumannomyces graminis var tritici
Canadian Journal of Microbiology, 2008Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Kurt Mendgenk Mendgen, Luis Vicente LopezllorcaAbstract:Fungal root endophytes obtained from natural vegetation were tested for antifungal activity in dual culture tests against the root pathogen Gaeumannomyces graminis var. tritici. Fifteen isolates, including Acremonium blochii, Acremo- nium furcatum, Aspergillus fumigatus, Cylindrocarpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveillei, and a sterile mycelium, selected based on the dual culture test, were inoculated on bar- ley roots in growth tubes under axenic conditions, both in the absence and presence of G. graminis var. tritici. All isolates colonized the rhizosphere and very often the root cortex without causing disease symptoms and without affecting plant growth. Eight isolates significantly reduced the symptoms caused by G. graminis var. tritici, and 6 of them reduced its presence in the roots. Resume´ : L'activiteantifongique d'endophytes fongiques racinaires isolesd e la vegetation naturelle envers le pathogene racinaire Gaeumannomyces graminis var. tritici aetetestee par un essai en double culture. Quinze isolats choisis sur la base du test en double culture, comprenant Acremonium blochii, Acremonium furcatum, Aspergillus fumigatus, Cylindro- carpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveilli et un myce ´- lium sterile, ont eteinocules dans des racines d'orge cultivees en tube sous des conditions axeniques, en presence ou en absence de G. graminis var. tritici. Tous les isolats ont colonisela rhizosphere et, souvent, le cortex des racines, sans cau- ser l'apparition de symptomes de maladie et sans affecter la croissance des plants. Huit isolats ont significativement reduit les symptomes causes par G. graminis var. tritici et 6 d'entre eux ont reduit sa presence dans les racines.
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colonization of barley roots by endophytic fungi and their reduction of take all caused by gaeumannomyces graminis var tritici
Canadian Journal of Microbiology, 2008Co-Authors: Jose G Maciavicente, Kurt Mendgenk Mendgen, Luis Vicente Lopezllorca, Hansborje Janssonh B JanssonAbstract:Fungal root endophytes obtained from natural vegetation were tested for antifungal activity in dual culture tests against the root pathogen Gaeumannomyces graminis var. tritici. Fifteen isolates, including Acremonium blochii, Acremonium furcatum, Aspergillus fumigatus, Cylindrocarpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveillei, and a sterile mycelium, selected based on the dual culture test, were inoculated on barley roots in growth tubes under axenic conditions, both in the absence and presence of G. graminis var. tritici. All isolates colonized the rhizosphere and very often the root cortex without causing disease symptoms and without affecting plant growth. Eight isolates significantly reduced the symptoms caused by G. graminis var. tritici, and 6 of them reduced its presence in the roots.
Jose G Maciavicente - One of the best experts on this subject based on the ideXlab platform.
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colonisation of barley roots by endophytic Fusarium equiseti and pochonia chlamydosporia effects on plant growth and disease
Annals of Applied Biology, 2009Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Laura Cristina Rosso, Aurelio Ciancio, Luis Vicente LopezllorcaAbstract:Colonisation of plant roots by endophytic fungi may confer benefits to the host such as protection against abiotic or biotic stresses or plant growth promotion. The exploitation of these properties is of great relevance at an applied level, either to increase yields of agricultural crops or in reforestation activities. Fusarium equiseti is a naturally occurring endophyte in vegetation under stress in Mediterranean ecosystems. Pochonia chlamydosporia is a nematode egg- parasitic fungus with a worldwide distribution. Both fungi have the capacity to colonise roots of non-host plants endophytically and to protect them against phytopathogenic fungi under laboratory conditions. The aim of this study was to evaluate the root population dynamics of these fungi under non-axenic practical conditions. Both fungal species were inoculated into barley roots. Their presence in roots and effects on plant growth and incidence of disease caused by the pathogen Gaeumannomyces graminis var. tritici were monitored periodically. Both fungi colonised barley roots endophytically over the duration of the experiment and competed with other existing fungal root colonisers. Furthermore, colonisation of roots by P. chlamydosporia promoted plant growth. Although a clear suppressive effect on disease could not be detected, F. equiseti isolates reduced the mean root lesion length caused by the pathogen. Results of this work suggest that both F. equiseti and P. chlamydosporia are long-term root endophytes that confer beneficial effects to the host plant.
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real time pcr quantification and live cell imaging of endophytic colonization of barley hordeum vulgare roots by Fusarium equiseti and pochonia chlamydosporia
New Phytologist, 2009Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Nicholas J Talbot, Luis Vicente LopezllorcaAbstract:*New tools were developed for the study of the endophytic development of the fungal species Fusarium equiseti and Pochonia chlamydosporia in barley (Hordeum vulgare) roots. These were applied to monitor the host colonization patterns of these potential candidates for biocontrol of root pathogens. * Molecular beacons specific for either F. equiseti or P. chlamydosporia were designed and used in real-time polymerase chain reaction (PCR) quantification of fungal populations in roots. Genetic transformation of isolates with the green fluorescent protein (GFP) gene was carried out using an Agrobacterium tumefaciens-mediated transformation protocol, and spatial patterns of root colonization were investigated by laser confocal microscopy. * Quantification of endophytes by real-time PCR in roots of barley gave similar results for all fungi, and was more accurate than culturing methods. Conversely, monitoring of root colonization by GFP-expressing transformants showed differences in the endophytic behaviours of the two species, and provided evidence of a plant response against endophyte colonization. * Both F. equiseti and P. chlamydosporia colonized barley roots endophytically, escaping attempts by the host to prevent fungal growth within root tissues. This strongly supports a balanced antagonism between the virulence of the colonizing endophyte and the plant defence response. Development of real-time PCR techniques and GFP transformants of these fungal species will facilitate future work to determine their biocontrol capacity.
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colonization of barley roots by endophytic fungi and their reduction of take all caused by gaeumannomyces graminis var tritici
Canadian Journal of Microbiology, 2008Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Kurt Mendgenk Mendgen, Luis Vicente LopezllorcaAbstract:Fungal root endophytes obtained from natural vegetation were tested for antifungal activity in dual culture tests against the root pathogen Gaeumannomyces graminis var. tritici. Fifteen isolates, including Acremonium blochii, Acremo- nium furcatum, Aspergillus fumigatus, Cylindrocarpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveillei, and a sterile mycelium, selected based on the dual culture test, were inoculated on bar- ley roots in growth tubes under axenic conditions, both in the absence and presence of G. graminis var. tritici. All isolates colonized the rhizosphere and very often the root cortex without causing disease symptoms and without affecting plant growth. Eight isolates significantly reduced the symptoms caused by G. graminis var. tritici, and 6 of them reduced its presence in the roots. Resume´ : L'activiteantifongique d'endophytes fongiques racinaires isolesd e la vegetation naturelle envers le pathogene racinaire Gaeumannomyces graminis var. tritici aetetestee par un essai en double culture. Quinze isolats choisis sur la base du test en double culture, comprenant Acremonium blochii, Acremonium furcatum, Aspergillus fumigatus, Cylindro- carpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveilli et un myce ´- lium sterile, ont eteinocules dans des racines d'orge cultivees en tube sous des conditions axeniques, en presence ou en absence de G. graminis var. tritici. Tous les isolats ont colonisela rhizosphere et, souvent, le cortex des racines, sans cau- ser l'apparition de symptomes de maladie et sans affecter la croissance des plants. Huit isolats ont significativement reduit les symptomes causes par G. graminis var. tritici et 6 d'entre eux ont reduit sa presence dans les racines.
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colonization of barley roots by endophytic fungi and their reduction of take all caused by gaeumannomyces graminis var tritici
Canadian Journal of Microbiology, 2008Co-Authors: Jose G Maciavicente, Kurt Mendgenk Mendgen, Luis Vicente Lopezllorca, Hansborje Janssonh B JanssonAbstract:Fungal root endophytes obtained from natural vegetation were tested for antifungal activity in dual culture tests against the root pathogen Gaeumannomyces graminis var. tritici. Fifteen isolates, including Acremonium blochii, Acremonium furcatum, Aspergillus fumigatus, Cylindrocarpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveillei, and a sterile mycelium, selected based on the dual culture test, were inoculated on barley roots in growth tubes under axenic conditions, both in the absence and presence of G. graminis var. tritici. All isolates colonized the rhizosphere and very often the root cortex without causing disease symptoms and without affecting plant growth. Eight isolates significantly reduced the symptoms caused by G. graminis var. tritici, and 6 of them reduced its presence in the roots.
Mohsen Mohamed Elsharkawy - One of the best experts on this subject based on the ideXlab platform.
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the plant growth promoting fungus Fusarium equiseti and the arbuscular mycorrhizal fungus glomus mosseae induce systemic resistance against cucumber mosaic virus in cucumber plants
Plant and Soil, 2012Co-Authors: Mohsen Mohamed Elsharkawy, Hideki Takahashi, Masafumi Shimizu, Mitsuro HyakumachiAbstract:Aims The aim of this study was to elucidate the effects of the interactions between the arbuscular mycorrhizal fungus Glomus mosseae (Gm) and Fusarium equiseti GF18-3 on cucumber growth and the biocontrol of the yellow strain of Cucumber mosaic virus (CMV-Y).
Hans-börje Jansson - One of the best experts on this subject based on the ideXlab platform.
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colonisation of barley roots by endophytic Fusarium equiseti and pochonia chlamydosporia effects on plant growth and disease
Annals of Applied Biology, 2009Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Laura Cristina Rosso, Aurelio Ciancio, Luis Vicente LopezllorcaAbstract:Colonisation of plant roots by endophytic fungi may confer benefits to the host such as protection against abiotic or biotic stresses or plant growth promotion. The exploitation of these properties is of great relevance at an applied level, either to increase yields of agricultural crops or in reforestation activities. Fusarium equiseti is a naturally occurring endophyte in vegetation under stress in Mediterranean ecosystems. Pochonia chlamydosporia is a nematode egg- parasitic fungus with a worldwide distribution. Both fungi have the capacity to colonise roots of non-host plants endophytically and to protect them against phytopathogenic fungi under laboratory conditions. The aim of this study was to evaluate the root population dynamics of these fungi under non-axenic practical conditions. Both fungal species were inoculated into barley roots. Their presence in roots and effects on plant growth and incidence of disease caused by the pathogen Gaeumannomyces graminis var. tritici were monitored periodically. Both fungi colonised barley roots endophytically over the duration of the experiment and competed with other existing fungal root colonisers. Furthermore, colonisation of roots by P. chlamydosporia promoted plant growth. Although a clear suppressive effect on disease could not be detected, F. equiseti isolates reduced the mean root lesion length caused by the pathogen. Results of this work suggest that both F. equiseti and P. chlamydosporia are long-term root endophytes that confer beneficial effects to the host plant.
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real time pcr quantification and live cell imaging of endophytic colonization of barley hordeum vulgare roots by Fusarium equiseti and pochonia chlamydosporia
New Phytologist, 2009Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Nicholas J Talbot, Luis Vicente LopezllorcaAbstract:*New tools were developed for the study of the endophytic development of the fungal species Fusarium equiseti and Pochonia chlamydosporia in barley (Hordeum vulgare) roots. These were applied to monitor the host colonization patterns of these potential candidates for biocontrol of root pathogens. * Molecular beacons specific for either F. equiseti or P. chlamydosporia were designed and used in real-time polymerase chain reaction (PCR) quantification of fungal populations in roots. Genetic transformation of isolates with the green fluorescent protein (GFP) gene was carried out using an Agrobacterium tumefaciens-mediated transformation protocol, and spatial patterns of root colonization were investigated by laser confocal microscopy. * Quantification of endophytes by real-time PCR in roots of barley gave similar results for all fungi, and was more accurate than culturing methods. Conversely, monitoring of root colonization by GFP-expressing transformants showed differences in the endophytic behaviours of the two species, and provided evidence of a plant response against endophyte colonization. * Both F. equiseti and P. chlamydosporia colonized barley roots endophytically, escaping attempts by the host to prevent fungal growth within root tissues. This strongly supports a balanced antagonism between the virulence of the colonizing endophyte and the plant defence response. Development of real-time PCR techniques and GFP transformants of these fungal species will facilitate future work to determine their biocontrol capacity.
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colonization of barley roots by endophytic fungi and their reduction of take all caused by gaeumannomyces graminis var tritici
Canadian Journal of Microbiology, 2008Co-Authors: Jose G Maciavicente, Hans-börje Jansson, Kurt Mendgenk Mendgen, Luis Vicente LopezllorcaAbstract:Fungal root endophytes obtained from natural vegetation were tested for antifungal activity in dual culture tests against the root pathogen Gaeumannomyces graminis var. tritici. Fifteen isolates, including Acremonium blochii, Acremo- nium furcatum, Aspergillus fumigatus, Cylindrocarpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveillei, and a sterile mycelium, selected based on the dual culture test, were inoculated on bar- ley roots in growth tubes under axenic conditions, both in the absence and presence of G. graminis var. tritici. All isolates colonized the rhizosphere and very often the root cortex without causing disease symptoms and without affecting plant growth. Eight isolates significantly reduced the symptoms caused by G. graminis var. tritici, and 6 of them reduced its presence in the roots. Resume´ : L'activiteantifongique d'endophytes fongiques racinaires isolesd e la vegetation naturelle envers le pathogene racinaire Gaeumannomyces graminis var. tritici aetetestee par un essai en double culture. Quinze isolats choisis sur la base du test en double culture, comprenant Acremonium blochii, Acremonium furcatum, Aspergillus fumigatus, Cylindro- carpon sp., Cylindrocarpon destructans, Dactylaria sp., Fusarium equiseti, Phoma herbarum, Phoma leveilli et un myce ´- lium sterile, ont eteinocules dans des racines d'orge cultivees en tube sous des conditions axeniques, en presence ou en absence de G. graminis var. tritici. Tous les isolats ont colonisela rhizosphere et, souvent, le cortex des racines, sans cau- ser l'apparition de symptomes de maladie et sans affecter la croissance des plants. Huit isolats ont significativement reduit les symptomes causes par G. graminis var. tritici et 6 d'entre eux ont reduit sa presence dans les racines.
