Promotion of Eucalyptus sp. Seedling Growth by Phosphate-Solubilizing Bacteria under Different Phosphorus Doses and Sources
Abstract
Well-developed eucalyptus plantations rely on high-quality seedlings, which benefit from shorter nursery periods. However, seedlings in nurseries face numerous diseases and environmental stresses that can hinder growth. Therefore, rhizobacteria offer an effective, sustainable alternative to improve seedling development. In particular, phosphate-solubilizing bacteria enhance phosphorus availability, boosting nutrient uptake, accelerating growth, and reducing nursery time. This study aimed to evaluate the growth promotion of Eucalyptus benthamii seedlings by phosphate-solubilizing bacteria applied to seeds and substrate, and their interaction with different phosphorus sources and doses. The experiment followed a completely randomized design in a triple factorial arrangement: factor 1 – bacterial strains (RB023, RB030, RB041, isolated from the rhizosphere, and a control); factor 2 – phosphorus source (monoammonium phosphate and simple superphosphate); and factor 3 – phosphorus dose (0%, 50%, and 100% of the recommended level). On average, inoculated seedlings showed a 23% increase in total biomass compared to the control. Simple superphosphate resulted in greater diameter, fresh weight of the aboveground part, aboveground biomass, and total biomass. Surprisingly, the 0% phosphorus dose produced the highest averages, highlighting the potential of phosphate-solubilizing bacteria to promote seedling growth even under low phosphorus conditions.
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How to cite
Marcolin, G.; Gomes, C. A. F. C.; Portela, R. M.; Garcia, F. A. D. O. (2026). Promotion of Eucalyptus sp. Seedling Growth by Phosphate-Solubilizing Bacteria under Different Phosphorus Doses and Sources. TreeDimensional Journal, 16(e026278), 1-13. https://doi.org/10.55746/treed.2026.05.278.
@article{marcolin2026,
title={Promotion of Eucalyptus sp. Seedling Growth by Phosphate-Solubilizing Bacteria under Different Phosphorus Doses and Sources},
author={Marcolin, Giovanna and Gomes, Caio Augusto Fidelix Carneiro and Portela, Renan Marcelo and Garcia, Flávio Augusto de Oliveira},
journal={TreeDimensional Journal},
year={2026},
volume={16},
number={e026278},
pages={1-13},
doi={10.55746/treed.2026.05.278}
}TY - JOUR AU - Marcolin, Giovanna AU - Gomes, Caio Augusto Fidelix Carneiro AU - Portela, Renan Marcelo AU - Garcia, Flávio Augusto de Oliveira TI - Promotion of Eucalyptus sp. Seedling Growth by Phosphate-Solubilizing Bacteria under Different Phosphorus Doses and Sources JO - TreeDimensional Journal PY - 2026 VL - 16 IS - e026278 SP - 1 EP - 13 DO - 10.55746/treed.2026.05.278 AB - Well-developed eucalyptus plantations rely on high-quality seedlings, which benefit from shorter nursery periods. However, seedlings in nurseries face numerous diseases and environmental stresses that can hinder growth. Therefore, rhizobacteria offer an effective, sustainable alternative to improve seedling development. In particular, phosphate-solubilizing bacteria enhance phosphorus availability, boosting nutrient uptake, accelerating growth, and reducing nursery time. This study aimed to evaluate the growth promotion of Eucalyptus benthamii seedlings by phosphate-solubilizing bacteria applied to seeds and substrate, and their interaction with different phosphorus sources and doses. The experiment followed a completely randomized design in a triple factorial arrangement: factor 1 – bacterial strains (RB023, RB030, RB041, isolated from the rhizosphere, and a control); factor 2 – phosphorus source (monoammonium phosphate and simple superphosphate); and factor 3 – phosphorus dose (0%, 50%, and 100% of the recommended level). On average, inoculated seedlings showed a 23% increase in total biomass compared to the control. Simple superphosphate resulted in greater diameter, fresh weight of the aboveground part, aboveground biomass, and total biomass. Surprisingly, the 0% phosphorus dose produced the highest averages, highlighting the potential of phosphate-solubilizing bacteria to promote seedling growth even under low phosphorus conditions. KW - Phosphorus KW - Seedling fertilization KW - Rhizobacteria KW - Plant growth-promoting bacteria. ER -
Marcolin, G.; Gomes, C. A. F. C.; Portela, R. M.; Garcia, F. A. D. O. (2026). Promotion of Eucalyptus sp. Seedling Growth by Phosphate-Solubilizing Bacteria under Different Phosphorus Doses and Sources. TreeDimensional Journal, 16(e026278), 1-13. https://doi.org/10.55746/treed.2026.05.278. Import via Mendeley Web Importer using DOI 10.55746/treed.2026.05.278
Add to Zotero using DOI 10.55746/treed.2026.05.278 Marcolin, G.; Gomes, C. A. F. C.; Portela, R. M.; Garcia, F. A. D. O. (2026). Promotion of Eucalyptus sp. Seedling Growth by Phosphate-Solubilizing Bacteria under Different Phosphorus Doses and Sources. TreeDimensional Journal, 16(e026278), 1-13. https://doi.org/10.55746/treed.2026.05.278.
Marcolin, G.; Gomes, C. A. F. C.; Portela, R. M.; Garcia, F. A. D. O. (2026). Promotion of Eucalyptus sp. Seedling Growth by Phosphate-Solubilizing Bacteria under Different Phosphorus Doses and Sources. TreeDimensional Journal, 16(e026278), 1-13. https://doi.org/10.55746/treed.2026.05.278.