Cultivable bacterial microbiota of roots, stalks and rhizosphere of Saccharum officinarum: a new reservoir of plant growth-promoting bacteria (PGPB)?

CINA L; ALIBRANDI; MONACO; MICHAVELA, M.G.; FILIPPONE M.P,; CASTAGNARO; RACEDO, J.; CIACCIO AND PUFFIA

Palermo

Congreso; II° WORKSHOP NAZIONALE: "Creare valore: La ricerca biotech per la competitività delle imprese; 2018

Microorganisms are widespread inhabitants of rhizosphere and plant tissues and have been shown to assist plant growth and health. However, studies evaluating the diversity, structure and impact of the microbiota in economic important crops are still rare. In this work, we aimed to isolate, identify and characterize the microbiota of roots, stalks and rhizosphere of Saccharum officinarum a sugarcane widely cultivated in Argentine on industrial scale for sugar and biofuel production. All isolated bacterial strains were taxonomically characterized on the base of their 16S rRNA gene sequence. Furthermore, plant growthpromoting (PGP) properties of all the strains were assayed. Most strains produced indole acetic acid (IAA) and siderophores. Moreover, they exhibited a variable capacity for phosphate solubilization, nitrogenfixation, antibiotic production and resistance to water and salt stresses. These results indicate that microbial isolates of S.officinarum may have a key role to improve plant growth and can be used as inoculants to establish a sustainable crop production system