Abstract
The inoculation of forest species with plant growth-promoting bacteria has grown and is increasingly sought to reduce the use of synthetic products. Thus, the objective was to evaluate the effect of the interaction between endophytic bacteria and synthetic indole butyric acid (IBA) on the initial development of Corymbia citriodora x Corymbia torelliana (CcCt) plants. The treatments were established by factorial (6 × 2) + 1, in which the mini-cuttings were inoculated with Pantoea vagans strains 7URP1-6 (B07) and 45URP4-1 (B45), Priestia megaterium (B11), Exiguobacterium sibiricum (B19), Bacillus sp. (B58) and a control treatment with the inoculation vehicle only, followed by immersion in 0 or 1,000 mg kg− 1 of synthetic IBA, plus an additional control not inoculated and treated with 2,000 mg kg− 1 of IBA. In relation to the cuttings treated only with 2,000 mg kg− 1 of IBA, cuttings inoculated with bacteria B07, B11, B19, and B58 had a similar survival rate, an increase of 29–36% in the percentage of rooting and of 27–34% in plant height, produced rooted cuttings with larger collar diameters and greater dry mass of roots and shoots, and a greater number of colony forming units of bacteria in the rhizosphere and in root and shoot tissues. The inoculation of mini-cuttings of CcCt with B07, B11, B19 and B58, followed by immersion in 1,000 mg kg− 1 of IBA improved the development of rooted cuttings relative to inoculated cuttings without IBA treatment, although it is not known if the effect is directly attributable to these bacterial strains.
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Augusto Matias de Oliveira: Data Curation, Formal Analysis, Investigation, Methodology, Project Administration, Supervision, Validation, Visualization, Writing – Original Draft Preparation, Writing – Review & Editing.Márcia Regina da Costa: Methodology, Project Administration, Resources, Supervision, Validation, Visualization, Writing – Original Draft Preparation, Writing – Review & Editing. Paulo Henrique Grazziotti: Data Curation, Methodology, Validation, Visualization, Writing – Review. Caique Menezes de Abreu: Data Curation, Formal Analysis, Methodology, Visualization. Natanielly Rodrigues Avelino: Formal Analysis, Methodology, Data Curation, Writing – Review. Lílian Alves Carvalho Reis: Formal Analysis, Investigation, Writing – Original Draft Preparation. Gabriel Faria Parreiras de Andrade: Formal Analysis, Visualization, Writing – Original Draft Preparation.June Faria Scherrer Menezes: Validation, Investigation, Writing – Review, Translation.
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de Oliveira, A.M., da Costa, M.R., Grazziotti, P.H. et al. Initial development of Corymbia citriodora x Corymbia torelliana plants inoculated with endophytic bacteria under indole butyric acid concentrations. New Forests (2024). https://doi.org/10.1007/s11056-024-10053-x
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DOI: https://doi.org/10.1007/s11056-024-10053-x