title: Regulation of plants' phosphate uptake in common mycorrhizal networks: Role of intraradical fungal phosphate transporters.
abstract: We have recently identified two genes coding for inorganic phosphate transporters (Pht) in sorghum (Sorghum bicolor) and flax (Linum usitatissimum) that were induced in roots colonized by arbuscular mycorrhizal (AM) fungi. Mycorrhizal acquisition of inorganic phosphorus (Pi) was strongly affected by the combination of plant and AM fungal species, but the expression level of these genes coding for AM-inducible Pi transporters did not explain differences in plant phosphorus acquisition where flax and sorghum are sharing a common mycorrhizal network. In the present study, we investigated the possible role of fungal Pi transporters in the regulation of mycorrhizal Pi acquisition by measuring their expression in roots of flax and sorghum. One Pi transporter of Rhizophagus irregularis (RiPT5) showed a positive correlation with mycorrhizal Pi acquisition of sorghum. This indicates that a possible involvement in the regulation of mycorrhizal Pi acquisition. In general, expression of AMF Pi transporters was more related to mycorrhizal Pi acquisition of sorghum than of flax, indicating plant species-specific differences in the regulation of mycorrhizal Pi acquisition.
authors.affiliation: a Department of Environmental Sciences , Botany, Zurich-Basel Plant Science Center, University of Basel , Basel , Switzerland.|b Plant-Soil-Interactions, Institute of Sustainability Science Agroscope , Zurich , Switzerland.
authors.forename: Florian
authors.initials: F
authors.lastname: Walder
authors.affiliation: a Department of Environmental Sciences , Botany, Zurich-Basel Plant Science Center, University of Basel , Basel , Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Boller
authors.affiliation: a Department of Environmental Sciences , Botany, Zurich-Basel Plant Science Center, University of Basel , Basel , Switzerland.
authors.forename: Andres
authors.initials: A
authors.lastname: Wiemken
authors.affiliation: a Department of Environmental Sciences , Botany, Zurich-Basel Plant Science Center, University of Basel , Basel , Switzerland.|c Department of Biology , University of Fribourg , Fribourg , Switzerland.
authors.forename: Pierre-Emmanuel
authors.initials: PE
authors.lastname: Courty
mesh_terms: D019597:Flax / Q000378:metabolism* / Q000382:microbiology; D005656:Fungal Proteins / Q000378:metabolism / Q000502:physiology*; D038821:Mycorrhizae / Q000378:metabolism*; D028061:Phosphate Transport Proteins / Q000378:metabolism / Q000502:physiology*; D010710:Phosphates / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism; D045868:Sorghum / Q000378:metabolism* / Q000382:microbiology; D013045:Species Specificity
chemical_list: D005656:Fungal Proteins; D028061:Phosphate Transport Proteins; D010710:Phosphates; D010758:Phosphorus
keywords: Arbuscular mycorrhizal fungi; common mycorrhizal networks; fungal inorganic phosphate transporters; phosphate uptake; resource exchange