Recherches sur la résistance des sols aux maladies. XII. - Activité respiratoire dans un sol résistant et un sol sensible aux fusarioses vasculaires enrichis en glucose

Couteaudier, Yvonne; Jp, Louvet

doi:10.1051/agro:19850110

Cited by 21 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These observations are in agreement with previous findings showing that the carbohydrates are unequally furnished by the root (Rovira and Davey 1971). These results are also in agreement with other observations that meristematic tissues attract and stimulate zoospore germination of Phytophthora and Pythium (Campbell and Hendrix 1971), and that Fusarium activity and development are attributed to the presence of nutrients (Alabouvette et al 1984;Cugudda and Garibaldi 1987).…”

Section: Discussionsupporting

confidence: 93%

Early dynamic interactions between Fusarium oxysporum f.sp. lini and the roots of Linum usitatissimum as revealed by transgenic GUS-marked hyphae

Turlier¹,

Eparvier²

1994

Can. J. Bot.

Self Cite

View full text Add to dashboard Cite

The aim of this study was to accurately describe the initial processes of flax-root infection by Fusarium oxysporum f.sp. lini. A strain transformed with a GUS gene could be detected by the intense turquoise staining when metabolism was active. The stained fungus was observed on root surfaces in zones where exudation occurred: tips, hairs, rootlets, and wounds. Elsewhere, the mycelium was unstained. The external mycelium penetrated into undifferentiated cells, such as the renewed protodermis cells of the mature root, and the young apical cap cells of the emerging rootlets. The fungus grew and reached the subapical meristem and remained as a permanent internal site of infection. Hyphae grew in and between the undifferentiated cells of the root. When these cells differentiated, the fungus was destroyed in some cells (cortex with endodermis, phloem tubes) but not in others, which became infected cells. The protodermis became the infected cells and hairs of the epidermis. The hyphae did not grow transversely from the epidermis to the stele nor acropetally from apex to the tracheids or vessels. The xylem tissue became infected when it was an undifferentiated group of cells just formed from subapical initials.

show abstract

Section: Discussionsupporting

confidence: 93%

Early dynamic interactions between Fusarium oxysporum f.sp. lini and the roots of Linum usitatissimum as revealed by transgenic GUS-marked hyphae

Turlier¹,

Eparvier²

1994

Can. J. Bot.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Indeed, the intensity of the carbon and iron competition has been demonstrated to be higher in the suppressive soil than in the conducive soil. This difference was related both to the higher levels of microbial activity and reactivity and to the low concentration of available iron (1,27). Fluorescent pseudomonads associated with each of the two plant species, flax and tomato, differed between the two soils.…”

Section: Discussionmentioning

confidence: 95%

The composition of fluorescent pseudomonad populations associated with roots is influenced by plant and soil type

Latour¹,

Corberand²,

Laguerre³

et al. 1996

Appl Environ Microbiol

239

View full text Add to dashboard Cite

The diversities of fluorescent pseudomonads, from two uncultivated soils and from the roots of two plant species cultivated in these two soils, were compared. The phenotypic diversity of the bacterial isolates was characterized on the basis of biochemical and physiological tests and on the basis of their ability to utilize 147 different organic compounds. The genotypic diversity of the isolates was characterized on the basis of the types of 16S genes coding for rRNA (rDNA), their repetitive extragenic palindromic patterns by PCR, and plasmid profiles. Taxonomic identification of the isolates was achieved with both biochemical and physiological tests and by comparing their 16S rDNA types to those of reference and type strains of fluorescent Pseudomonas spp. Numerical analysis of phenotypic characteristics allowed the clustering of isolates that showed high levels of similarity. This analysis indicated that both soil type and host plant had an effect on the diversity of fluorescent pseudomonads. However, of the two factors studied, the soil was clearly the dominating one. Indeed, the populations associated with the roots of each plant species varied from one soil to the other. This variation could possibly be ascribed to the differences recorded between the phenotypically diverse populations of fluorescent pseudomonads from the two uncultivated soils. The plant selection was, at least partly, plant specific. It was not related to bacterial species and biovars or to the presence of plasmid DNA. The phenotypic clustering of isolates was well correlated with genotypic characterization by repetitive extragenic palindrome-PCR fingerprinting.

show abstract

“…But TOUSSOUN (1975) was the first to state that soil suppressive to Fusarium wilts supported large populations of non pathogenic Fusarium spp. The same type of observation was made in the suppressive soil from Châteaurenard which harbored high populations of F. oxysporum and F. solani (LOUVET et al 1976). The involvement of the non pathogenic populations of Fusarium spp.…”

Section: Introductionmentioning

confidence: 54%

“…More precisely the hypothesis of competition for the carbon source was proposed based on the fact that a single addition of glucose to a suppressive soil was sufficient to make it conducive (LOUVET et al 1976).…”

Section: Direct Interactions In Soil and The Rhizospherementioning

confidence: 99%

Modes of action of non-pathogenic strains of Fusarium oxysporum in controlling Fusarium wilts

Olivain¹

2002

Plant Prot. Sci.

View full text Add to dashboard Cite

Many studies have demonstrated the capacity of non-pathogenic strains of F. oxysporum to control Fusarium diseases. These non-pathogenic strains show several modes of action contributing to their biocontrol capacity. They are able to compete for nutrients in the soil, affecting the rate of chlamydospore germination and the saprophytic growth of the pathogen, diminishing the probability for the pathogen to reach the root surface. They are competing with the pathogen at the root surface for colonization of infection sites, and inside the root where they induce plant defence reactions. By triggering the defence reactions, they induce systemic resistance of the plant. Depending on the strain, and on the plant species, these mechanisms are more or less important, leading to a more or less efficient biocontrol efficacy.

show abstract

Recherches sur la résistance des sols aux maladies. XII. - Activité respiratoire dans un sol résistant et un sol sensible aux fusarioses vasculaires enrichis en glucose

Cited by 21 publications

References 2 publications

Early dynamic interactions between Fusarium oxysporum f.sp. lini and the roots of Linum usitatissimum as revealed by transgenic GUS-marked hyphae

Early dynamic interactions between Fusarium oxysporum f.sp. lini and the roots of Linum usitatissimum as revealed by transgenic GUS-marked hyphae

The composition of fluorescent pseudomonad populations associated with roots is influenced by plant and soil type

Modes of action of non-pathogenic strains of Fusarium oxysporum in controlling Fusarium wilts

Contact Info

Product

Resources

About