|Title||Phosphorus mobilization and biocontrol of plant pathogens combined in one strain – results of a fungus and a bacterial inoculant|
|Author(s)||Postma, J.; Nijhuis, E.H.|
|Event||7th International Symposium Plant Protection and Plant Health in Europe: The "principal mode of action" of micro-organisms as agents between fertilization and plant protection, Berlin, 2015-03-12/2015-03-13|
PRI Bioint Entomology & Disease Management
|Publication type||Abstract in scientific journal or proceedings|
|Abstract||Mycorrhizal fungi are mainly known for supporting phosphorous uptake by plants, whereas Pseudomonas species are often selected as biocontrol strains. However, both microbial groups have also other mode of actions.
Our research showed that by inoculating peat substrate with the mycorrhizal fungus Rhizophagus irregularis strawberry roots were colonized by mycorrhiza, which was not the case in non‐inoculated peat substrate. These mycorrhiza‐colonized strawberry plants showed significantly reduced Phythophthora
cactorum infections. An antagonistic Pseudomonas chloraraphis strain was selected for its phosphorous (P) mobilisation capacity.
In greenhouse assays, this strain elevated P levels in young tomato plants, and infection due to Pythium aphanidermatum was repeatedly reduced.
These two examples demonstrate the multiple mode of actions of one fungal and one bacterial inoculant, both combining P mobilisation and biocontrol of plant pathogens