THE INFLUENCE OF MYCORRHIZAL FUNGI AND RHIZOBACTERIA ON GROWTH AND DEVELOPMENT OF MICROPROPAGATED BANANA AND BIOCONTROL OF FUSARIUM WILT AND NEMATODES
HUNTER3, AB PATISSON4 KG PEGG1 and NY MOORE1
1 DPI, Qld Horticulture Institute, Indooroopilly, Queensland 4068, Australia; 2DPI, Maroochy Research Station, Nambour, Queensland 4560, Australia; 3 DPI, Redlands Research Station, Cleveland, Queensland 4163, Australia; 4DPI, Centre for Wet Tropics Agriculture, South Johnstone, Queensland 4859, Australia
Background and objectives
Some soils are suppressive to nematodes and fusarium wilt. Conventional vegetative planting material (i.e. suckers and rhizome pieces) from such soils may be protected by beneficial microorganisms such as mycorrhizal fungi and bacteria which are not available to micropropagated plants raised in an aseptic environment. Research has shown that micropropagated bananas inoculated with mycorrhizal fungi show significant increases in nutrient content and plant growth compared to uninoculated controls  and, as a result of this increased vigour, a lower incidence of nematode damage. Rhizobacteria such as fluorescent pseudomonads have been effective in reducing the severity of Fusarium diseases in several crops and significantly reduce infectivity of parasitic nematodes.
This study aims to isolate beneficial microorganisms from plantations growing in wilt- and nematode-suppressive soils and introduce them to micropropagated plants before planting in infested fields, in order to obtain more vigorous plants better able to utilize nutrients and with greater protection against disease.
Materials and methods
Results and conclusions
Bacterial isolates and mycorrhizal fungi are being evaluated in vitro and in glasshouse trials for colonization ability, antagonism towards Foc and nematodes, effect on plant growth and disease control.