02614naa a2200265 a 450000100080000000500110000800800410001902200140006002400360007410000190011024501520012926000090028152017680029065300240205865300170208265300300209965300220212965300280215170000200217970000250219970000190222470000200224370000150226377300700227821549062023-07-12       2023    bl uuuu     u00u1 u    #d  a1878-81817 a10.1016/j.bcab.2023.1027342DOI1 aMOREIRA, F. M.  aOptimal growth and N use efficiency enhancements by growth- promoting rhizobacteria in seedlings banana under N2 deficiency.h[electronic resource]  c2023  aBanana crops require higher amounts of chemical fertilizers to meet the demand of productivity international markets, which represent high costs and can be hazardous to the environment. Plant growth-promoting rhizobacteria can improve the nutrients use efficiency through their bio-chemical abilities, eventually, partially replace chemical fertilizers without reducing productiv-ity. So, this study was aimed to evaluate the agronomic efficiency of several bacterial strains, in combination with levels of N fertilization, on morphophysiological, biochemical, and nutritional characteristics related to the growth of banana seedlings, Prata Ana cultivar. The experiment was conducted in greenhouse in a 6 x 5 factorial scheme with the following factors: (1) inoculation with BR11005, BR11674, BR12137, BR12157 or BR12158, and a treatment without inoculation; and (2) doses of N (0, 50, 100, 150 or 200 mg kg-1 of substrate). Bacterial strains were character-ized with respect to genetical, biochemical and physiological aspects. Ninety days after trans-planting, plant height, pseudostem diameter, number of leaves, total leaf area, root volume, total dry mass, total content of chlorophyll, carotenoids, and proline contents, N concentrations and their use efficiency were evaluated. Only strains BR11005 (Azospirillum baldaniorum) and BR12157 (Bacillus velezensis) showed potential to improve the performance of growth-related morphophysiological traits and N use eficiency. The strains are effective for biological N fixation, potassium, and phosphate solubilization, auxin synthesis, and production of siderophores, and hydrolytic enzymes. The performance of plants treated with these strains exceeded those of fertil-ization with 200 mg kg-1 of N treatment.  aBacillus velezensis  aBioinoculant  aGrowth-stimulate bacteria  aMineral nutrition  aNitrogen use efficiency1 aCAIRO, P. A. R.1 aNASCIMENTO, L. R. DO1 aROSA, R. C. C.1 aROCHA, L. de S.1 aHADDAD, F.  tBiocatalysis and Agricultural Biotechnologygv. 50, 102734, 2023.