All the 20 tested isolates
of Pseudomonads fluorescent were positive for the production of
siderophores in iron-deficient culture medium and HCN, while of the
20 antagonist bacteria strains, 15 strains (75%) showed positive for the
production of plant growth-promoting hormone, IAA. Isolates TS3B6
and TS3A5 produced higher IAA (20.5 and 19.0 μgml-1, respectively),
whereas all the other isolates (except TS3A1, TS3C6, TS3C9 and
TS3A2) produced IAA between 2.4 and 9.7 μgml-1 (Table 1).