@article{fdi:010046143, title = {{R}esponses of {P}inus halepensis growth, soil microbial catabolic functions and phosphate-solubilizing bacteria after rock phosphate amendment and ectomycorrhizal inoculation}, author = {{O}uahmane, {L}. and {R}evel, {J}. {C}. and {H}afidi, {M}. and {T}hioulouse, {J}. and {P}rin, {Y}. and {G}aliana, {A}. and {D}reyfus, {B}ernard and {D}uponnois, {R}obin}, editor = {}, language = {{ENG}}, abstract = {{W}e examined the effects of an ectomycorrhizal ({EM}) fungus, {P}isolithus sp., on of the growth of {P}inus halepensis ({A}llepo pine) seedlings, soil microbial functions and rock phosphate solubilization in a un-disinfected soil amended or not with a {M}oroccan rock phosphate. {A}llepo pine seedlings were inoculated with an {EM} fungus ({P}isolithus sp. strain {PH}4) isolated from a {P}. halepensis plantation and selected for its high ability to mobilize {P} from an inorganic form of phosphate. {A}fter 4 month's culture in a disinfected substrate, plants were transferred in 10 l-containers filled with a natural forest soil and amended or not with rock phosphate powder. {A}fter 12 month's culturing, the growth, needle nutrient concentrations of {P}. halepensis plants were measured. {S}oil microbial catabolic diversity was assessed by measuring {CO}2 production of substrate induced respiration responses. {F}luorescent pseudomonads were isolated from each soil treatment and tested in axenic conditions for their ability to solubilize a source of inorganic phosphate. {T}he results clearly showed that (i) {P}. halepensis growth was greatly promoted by the presence of the ectomycorrhizal fungus {P}isolithus strain {PH}4 in a disinfected soil/vermiculite mixture and in a non disinfected soil, (ii) ectomycorrhizal inoculation induced significant changes in the functions of soil microbial communities and selected microorganisms potentially beneficial to the plant growth (i.e. phosphate-solubilizing fluorescent pseudomonad) and (iii) rock phosphate solubilisation was mainly dependent on {EM} inoculation and mycorrhizosphere microorganisms. {T}hese results were in accordance with previous studies where it was demonstrated that {EM} symbiosis has a beneficial effect on plant growth through a direct effect on the host plant but also an indirect effect via a selective pressure on soil microbiota that favours microorganisms potentially beneficial to plant growth.}, keywords = {{B}acteria ; {E}ctomycorrhizosphere effect ; {F}luorescent pseudomonads ; {P}inus halepensis ; {P}isolithus sp. ; {R}ock phosphate ; {S}oil functional abilities ; {M}orocco}, booktitle = {}, journal = {{P}lant and {S}oil}, volume = {320}, numero = {1-2}, pages = {169--179}, ISSN = {0032-079{X}}, year = {2009}, DOI = {10.1007/s11104-008-9882-z}, URL = {https://www.documentation.ird.fr/hor/fdi:010046143}, }