Growth promotion of blackcurrant softwood cuttings by recombinant strain Pseudomonas fluorescens BSP53a synthesizing an increased amount of indole-3-acetic acid

Two isogenic Pseudomonas ftuorescens strains differing in plant hormone production were used to inoculate softwood cuttings. Production of bacterial indole-3-acetic add (IAA) was shown to have a stimulatory effect on the root development of blackcurrant softwood cuttings, whereas for sour cherry it was inhibitory. The size of the population of the inoculated strain on the root surface of the cuttings correlated with the effect observed.