Multifunctional characteristics of Acinetobacter lwoffii Bac109 for growth promotion and colonization in micropropagated sugarcane

ABSTRACT Endophytic bacteria with multifunctional characteristics can benefit plants through different mechanisms, as well promoting growth in an efficient, low-cost and ecofriendly way. This study analyzed the potential of endophytic isolate Acinetobacter lwoffii Bac109 early vitro sugarcane seedlings. The strain showed to solubilize phosphate a solid medium (solubilization index: 3.73). In addition, bacterium was efficient biocontrol agent against phytopathogenic fungi Rhizoctonia sp., Fusarium oxysporum, Phoma sp. Bipolaris papendorfii, showing performance equal or better than commercial antifungal hygromycin B. An assay confirmed biofilm production, which increased presence root extract. Additionally, A. strong adhesion roots. inoculation this micropropagated seedlings shoot length (35 %) regulated nonphotochemical energy dissipation after 28 days cultivation. At end experiment, great for survival, 5.72 × 107 CFU mL-1 recovered from substrate, what is crucial plant interaction. results biotechnology application by evaluating traits promotion specific interactions sugarcane, may help improve micropropagation protocols crop.