title: Effect of an arbuscular mycorrhizal fungus, Glomus mosseae, and a rock-phosphate-solubilizing fungus, Penicillium thomii, on Mentha piperita growth in a soilless medium.
abstract: Rock phosphate effect on English mint (Mentha piperita L.) grown on steamed perlite:vermiculite (1:1, v:v) substrate, with and without rock phosphate, was evaluated in greenhouse experiments. Five treatments were carried out by inoculation with an arbuscular mycorrhizal fungus Glomus mosseae and a phosphorus solubilizing microorganism Penicillium thomii. Plant aerial biomass, phosphorus concentration in plant tissue, and P available in the substrate, were evaluated upon two harvests. After the first harvest, plant aerial biomass did not show significant differences between treatments using rock phosphate as fertilizer, although P content in plants inoculated with P. thomii was higher. The second harvest revealed a higher biomass and plant tissue P content in treatments inoculated with G. mosseae. P. thomii increased P available in the substrate, whereas in the absence of G. mosseae, it did not enhance plant tissue P content. Mycorrhizal colonization was not affected by P. thomii. Microbial inoculation effect on English mint growth was also evaluated. The microbial effect was positive in all treatments when compared with the control without rock phosphate.
authors.affiliation: Instituto Spegazzini, Facultad de Ciencias Naturales y Museo U. N. L. P. Ave. 53 No 477, B1900AVJ, La Plata, Argentina. mcabello@netverk.com.ar
authors.forename: Marta
authors.initials: M
authors.lastname: Cabello
authors.forename: Gabriela
authors.initials: G
authors.lastname: Irrazabal
authors.forename: Ana Maria
authors.initials: AM
authors.lastname: Bucsinszky
authors.forename: Mario
authors.initials: M
authors.lastname: Saparrat
authors.forename: Santiago
authors.initials: S
authors.lastname: Schalamuk
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D018533:Biomass; D005658:Fungi / Q000254:growth & development* / Q000378:metabolism; D036142:Mentha piperita / Q000254:growth & development* / Q000382:microbiology*; D038821:Mycorrhizae / Q000254:growth & development* / Q000378:metabolism; D010407:Penicillium / Q000254:growth & development* / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism*; D012822:Silicon Dioxide / Q000737:chemistry
chemical_list: C003076:Perlite; D010758:Phosphorus; D012822:Silicon Dioxide; D000537:Aluminum Oxide