02198naa a2200265 a 450000100080000000500110000800800410001902200140006002400520007410000290012624501760015526000090033152013030034065000110164365000370165465000170169170000270170870000260173570000290176170000290179070000170181970000190183670000200185577300570187521441272022-06-15       2022    bl uuuu     u00u1 u    #d  a1098-53367 ahttps://doi.org/10.1007/s42770-021-00651-82DOI1 aSILVA, M. S. R. de A. da  aStimulatory effects of defective and effective 3-indoleacetic acid-producing bacterial strains on rice in an advanced stage of its vegetative cyclE.h[electronic resource]  c2022  aThe production of 3-indoleacetic acid (IAA) by plant growth-promoting bacteria (PGPR) stimulates root development and plant growth. In addition, morphological changes such as an increased root ramification and root hair production improves nutrient absorption and biomass accumulation. The objective of this work was to evaluate the effect of IAA-producing strains on rice in an advanced stage of its vegetative cycle. Rice was inoculated with Gluconacetobacter diazotrophicus PAL 5 and its lao- mutant, deficient in auxin production, Azospirillum baldaniorum Sp 245, and Escherichia coli DH10b. Both the mutant and wild-type G. diazotrophicus stimulated root elongation, area, volume, and diameter. However, the lao- mutant strain was the only one capable of increasing the number of roots. In turn, inoculation with A. baldaniorum had no significant effect on plant development. The inoculation with E. coli led to changes in root volume, area, and diameter, and a response that may be related to the stress caused by its presence. We conclude that the inoculation with G. diazotrophicus stimulates the root system?s growth independently of their IAA production ability, suggesting that a metabolite other than IAA is responsible for this effect at advanced stages of the rice?s vegetative cycle.  aAuxins  aGluconacetobacter diazotrophicus  aOryza Sativa1 aHUERTAS TAVARES, O. C.1 aOLIVEIRA, I. S. R. de1 aSILVA, C. S. R. de A. da1 aSILVA, C. S. R. de A. da1 aVIDAL, M. S.1 aBALDANI, J. I.1 aJESUS, E. da C.  tEnvironmental Microbiologygv. 53, p. 281?288, 2022.