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B. M. Mosse, A. S. Vincent, J. Whitney, and . Bose, The role of mycorrhiza in legume nutrition on marginal soils In: Exploiting the legume-rhizobium symbiosis in tropical agriculture College of Tropical Agriculture Miscellaneous Publication 45, pp.175-192, 1977.

D. N. Munns and B. Et-mosse, Mineral nutrition of legume crops. ln : Advances in legume sciences, pp.115-125, 1980.

L. Neilands, T. Peterson, and S. A. Et-leong, High Affinity Iron Transport in Microorganisms, pp.263-278, 1980.
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H. J. Nesbitt, N. Malajczuk, and A. R. Et-glenn, Bacterial colonization and lysis of Phytophthora cinnamomi, Transactions of the British Mycological Society, vol.77, issue.1, pp.47-54, 1981.
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P. H. Nye and P. B. Et-tinker, Solute Movement in the Soil-Root System, Soil Science, vol.127, issue.4, 1977.
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R. Pachlewski and J. Pachlewska, Studies on symbiotic properties of mycorrhizal fungi of Pine tPinus sylvestris ) with the aid of the method of mycorrhizal synthesis in pure culture on agar. Forest Research Institute St atus of applied biological control of soil borne plant pathogens, Warsaw Papavizas, G.c. Soil Biol. Biochem, vol.5, pp.709-720, 1973.

R. Perrin and J. Et-garbaye, Modification du potentiel infectueux des sols infectés par Pythium sp. sous l'effet des ectomycorhizes: résultats préliminaires. Dans : les mycorhizes: Biologie et Utilisation, pp.221-227, 1982.

R. L. Peterson, . Piche, and C. Et-plenchette, Mycorrhizae and their potential use in the agricultural and forestry industries, Biotechnology Advances, vol.2, issue.1, pp.101-120, 1984.
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Z. Prikry1, V. Vancura, and M. Et-wurst, Auxin formation by rhizosph ere bacteri a as a factor ofroot growth, pp.159-163, 1985.

A. Rambelli, The Rhizosphere of Mycorrhizae, pp.299-349, 1973.
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M. Ramstedt and K. , Protease, phenoloxidase and pectinase activities in mycorrhizal fungi, Transactions of the British Mycological Society, vol.81, issue.1, pp.157-161, 1983.
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J. A. Raven and F. A. Smith, NITROGEN ASSIMILATION AND TRANSPORT IN VASCULAR LAND PLANTS IN RELATION TO INTRACELLULAR pH REGULATION, New Phytologist, vol.16, issue.3, pp.415-431, 1976.
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E. S. Reynolds, THE USE OF LEAD CITRATE AT HIGH pH AS AN ELECTRON-OPAQUE STAIN IN ELECTRON MICROSCOPY, The Journal of Cell Biology, vol.17, issue.1, pp.208-212, 1963.
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P. Ricci and C. M. Et-messian, La dynamique des populations de Pithium dans les sols maraichers de Guadeloupe. II Facteurs du potentiel infectieux, Ann . Phytopathol, vol.8, pp.257-268, 1976.

B. N. Richards, The Microbiology of Terrestrial Ecosystems The role of vesicular-arbuscular mycorrhiza in controlling damping-off and growth reduction in cucumber caused by Pythium ultimum, 1987.

J. P. Ross, Effect of Nontreated Field Soil on Sporulation of Vesicular-Arbuscular Mycorrhizal Fungi Associated with Soybean, Phytopathology, vol.70, issue.12, pp.1200-1205, 1980.
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A. Rovira, Plant root exudates and their influence upon soil microorganisms, 1965.

A. Rovira, Interactions Between Plant Roots and Soil Microorganisms, Annual Review of Microbiology, vol.19, issue.1, 1965.
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A. Rovira, Manipulation of the rhizosphere microflora to increase plant production. Pages 185-197 in: Reviews of Rural Science 6, Biotechnology and Recombinant DNA Technology in the Animal Production Industries, 1985.

L. Salsac, M. Mention, C. Plassard, and D. Et-moussain, Données sur la nutrition azotée des champignons ectomycorhiziens, Colloq. INRA, vol.13, pp.129-140, 1982.

R. Sampangi, R. Perrin, and F. Et-le-tacon, Disease suppression and Growth promotion of Nrway Spruce and Douglas fir seedlings by the ectomycorrhizal fungus Laccaria laccata in forest nursery, Mycorrhizae: physiology and genetics, Proceeding of the 1st European symposium on mycorrhizae, 1986.

M. A. Gianinazzi and A. C. Gaur, Production of auxins and gibberellins by phosphatedissolving microorganisms, Zentralbl. Mikrobiol, vol.142, pp.799-806, 1987.

B. Schippers, Biological control of pathogens with rhizobacteria, Phil. Trans. R, 1988.

N. M. Shema1canova, Mycotrophy of woody plants Academy of science of USSR (trans. Israel prograrn for Scientific Trans Jerusalem, 1962.

A. Simon and E. R. Et-ridge, The Use of Ampicillin in a Simplified Selective Medium for the Isolation of Fluorescent Pseudomonads, Journal of Applied Bacteriology, vol.36, issue.3, pp.459-460, 1974.
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W. A. Sinclair, D. P. Cowles, and S. M. Et-hee, Fusarium root rot of Douglas fIT seedlings: suppression by soil fumigation, fertility management, and inoculation with spores of the fungal symbiont Laccaria laccata, pp.390-399, 1975.

W. A. Sinclair, D. M. Sylvia, and A. Ü. Et-larren, Disease suppression and growth promotion in Douglas fir seedlings by the ectomycorrhizal fungus L. laccata . For. Sei, pp.51-56, 1982.

V. Slankis, V. C. Runeckless, and G. Et-krotkov, Metabolites Liberated by Roots of White Pine (Pinus strobus L.) Seedlings, Physiologia Plantarum, vol.144, issue.3, pp.301-313, 1964.
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W. H. Smith, Release of organic materials from the roots of tree seedlings, Forest Seience, vol.15, pp.138-143, 1969.

J. I. Sperber, Solution of Mineral Phosphates by Soil Bacteria, Nature, vol.33, issue.4593, pp.994-995, 1957.
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G. Straatsma and J. Et-bruinsma, Carboxylated Metabolic Intermediates as Nutritional Factors in Vegetative Growth of the Mycorrhizal Mushroom Cantharellus cibarius Fr., Journal of Plant Physiology, vol.125, issue.3-4, 1986.
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G. Straatsma, L. J. Van-griensven, and J. Et-bruinsma, Root influence on in vitro growth of hyphae of the mycorrhizal mushroom Cantharellus cibarius replaced by carbon dioxide, Physiologia Plantarum, vol.28, issue.4, pp.521-528, 1986.
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E. Strzelczyk and J. Et-leniarska, Production of ~-group vitamins by mycorrhizal fungi and actinomycetes isolated from the root zone of Pine (Pinus sylvestris L.). Plant & Soi!, pp.387-394, 1985.

E. Strzelczyk and H. Et-rozycki, Production of ~-group vitamins by bacteria isolated from soil, rhizosphere, and mycorhizosphere of Pine tPinus sylvestris L.), Zbl . Mikrobiol, vol.140, pp.293-301, 1985.

E. Strzelczyk, M. Kampert, and L. Et-michalski, Production of cytokinin like substances by mycorrhizal fungi of Pine (Pinus sylvestris L.) in cultures with and without metabolites of actinornycetes, Acta Microbiologica Polonica, vol.34, pp.177-186, 1985.

S. Rao, N. S. Tilak, K. B. Singh, and C. S. , Ecology of non-symbiotic dinitrogen fixers, Progress in Microbial Ecology. Print House (India), 1985.

S. Rao, N. S. Tilak, K. V. Singh, and C. S. , Synergistic effect of vesicular-arbuscular mycorrhizas and Azospirillum brasilense on the growth of barley in pots, Soil Biology and biochemistry, vol.17, pp.119-121, 1985.

R. C. Summerbell, THE INHIBITORY EFFECT OF TRICHODERMA SPECIES AND OTHER SOIL MICROFUNGI ON FORMATION OF MYCORRHIZA BY LACCARIA BICOLOR IN VITRO, New Phytologist, vol.24, issue.3, pp.437-448, 1987.
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R. C. Summerbell, Microfungi associated with the mycorrhizal mantle and adjacent microhabitats within the rhizosphere of black spruce. Can o1, Bot, vol.67, pp.1085-1095, 1989.

J. R. Thomas, M. Neil, M. Darvill, A. G. Et-albersheim, and P. , Structure of Plant Cell Walls : XIX. Isolation and Characterization of Wall Polysaccharides from Suspension-Cultured Douglas Fir Cells, PLANT PHYSIOLOGY, vol.83, issue.3, pp.659-671, 1987.
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L. S. Thomashow and D. M. Et-weller, Role of phenazine antibiotic from Pseudomonas fluorescens in biological control of Gaeunnomyces graminis var, 1988.

K. B. Tilak, Interaction of vesicular-arbuscular mycorrhizae and nitrogen fixers, Proceedings of the Soil Biology Symposium, pp.219-226, 1985.

K. B. Tilak, C. Y. Li, and . Ho, Recovery of nitrcgen-fixing Azospirillum from spores of VA mycorrhizal fungi, 1987.

K. V. Tilak and . Ho, Occurence of nitrogen fixing Azospirillum on surface sterilized mycorrhizal roots of green onion (Alliwn cepa), Proceedings of the 7th North American Conference on, 1987.

P. B. Tinker, The role of microorganisms in mediating and facilitating the uptake of plant nutrients from soil, Plant & Soif, vol.76, pp.77-91, 1984.

I. E. Tommerup, Spore dormancy in vesicular-arbuscular mycorrhizal fungi, Transactions of the British Mycological Society, vol.81, issue.1, pp.37-45, 1983.
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I. C. Tommerup, Inhibition of spore germination of vesicular-arbuscular mycorrhizal fungi in soil, Transactions of the British Mycological Society, vol.85, issue.2, pp.267-278, 1985.
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A. Turfreijer, Pyverdinen de groene fluorescende Kelurstoffen von Pdeudomonas fluorescens . Thesis, British Abstract, vol.16, pp.165-178, 1942.

R. E. Valentines, ) Conrra st enhancement in the electron micro scop y of viruses, 1961.

V. Vancura and A. Et-hovadik, Root exudates of plants. II. Composition of root exud ates of sorne vegetables, p.21, 1965.

N. Villeneuve, F. Le-tacon, and D. Et-bouchard, Survival of inoculated La ccaria bicolor in competition with native ectomycorrhizal fungi and effects on the growth of ourplanted Dou glas fir seedlings, pp.95-107, 1991.

H. Voiry, Classification morphologique des ectomycorhizes du ch??ne et du h??tre dans le nord-est de la France, European Journal of Forest Pathology, vol.13, issue.5-6, pp.284-299, 1981.
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J. L. Wahl, Les bactéries associées au champignon ectomycorhizien Laccaria laccata et leurs effets sur l'établissement de la symbiose, p.94, 1989.

K. R. Walden and C. P. Selitrenni-koff, Plant and bacterial chitinases differ in antifungal activit y. 1, Gen. Microbiol, vol.134, pp.169-176, 1988.

T. Watanabe, W. Oyanagi, K. Suzuki, and H. Tanaka, Chitinase system of Bacillus circulans WL-12 and importance of chitinase A1 in chitin degradation., Journal of Bacteriology, vol.172, issue.7, pp.4017-4023, 1990.
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D. M. Weiler, Biological Control of Soilborne Plant Pathogens in the Rhizosphere with Bacteria, Annual Review of Phytopathology, vol.26, issue.1, pp.379-407, 1988.
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S. J. Williams and E. Et-davies, Use of Antibiotics for Selective Isolation and Enumeration of Actinomycetes in Soil, Journal of General Microbiology, vol.38, issue.2, pp.251-261, 1965.
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G. W. Wilson, B. A. Herrick, and D. G. Et-kitt, Suppression of Mycorrhizal Growth Response of Big Bluestem by Non-Sterile Soil, Mycologia, vol.80, issue.3, pp.338-343, 1988.
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B. Zak, Classification of ectornycorrhizae, in: Ectomycorrhizae, their Ecology and Physiology, pp.43-78, 1973.

D. Au and . Mécanismes, effet des bactéries par voie gazeuse et aqueuse sur la croissance saprophytique de divers syrnbiotes fongiques. L'acide citrique produit par une bactérie intervient dans la stimulation de hi. croissance de L. laccata . D'autres voies de recherche ont été abordées (production d'hon-nones, d'enzymes et solubilisation de phosphates peu solubles

L. Bam and . B~, utilisées avec succès dans les techniques de mycorhizaticn contrôlée en pépinière forestière SUT sol désinfecté, Elles permettent d'augmente, significativemcut la myccrhizarion du Douglas par L. laccata .D'autre part les résultats obtenus sur sol non désinfecté permettent d'envisager raisonnablement le remplacement du désinfectant

. Pseudotsuga-menziesii, Laccaria laccata , bactéries, ectornycorhizes, rhizosphère, interaccons microbiennes