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. 2022 Apr 29;38(6):101. doi: 10.1007/s11274-022-03283-8

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Fig. 3 — Biofilm formation (i.e., optical density at 492 nm ± SE) of the Azospirillum oryzae NBT506 strain in different media (each media is also applied as a control without bacteria and represented with white bars). Different letters highlight significant differences among media (P < 0.05). Azospirillum = Azospirillum oryzae Nfb-NO3 = N-free semi-solid media with nitrate ; OAB = minimal liquid medium ; TSB = tryptic soy broth ; NB = nutrient broth; LB = Luria broth. ; PBS = phosphate-buffered saline