From overall results, we found three plant growth-promoting traits – i.e. antagonism to fungal plant pathogens, antifungal volatile compound production and a moderate level of IAA production (4.9 mg g−1 DCW) – in Torulaspora globosa DMKU-RP31, whereas Rhodotorula paludigenum DMKU-RP301 showed a much higher IAA production (29.3 mg g−1 DCW) with some production of siderophore as an additional character. We therefore propose that T. globosa DMKU-RP31 might be used in two ways: enhancing plant growth and acting as a biocontrol agent. However, we also found high levels of IAA production (7.2–9.7 mg g−1 DCW) in four Cryptococcus flavus strains, accompanied with NH3 production as well as CMCase activity. These yeasts are also strains of interest for optimal IAA production.