Forest ecosystems are a source of microbial resources with biotechnological potential in agriculture. In this research, six bacterial strains from sporomes of the ectomycorrhizal fungus Lactarius salmonicolor R. Heim & Leclairde were isolated in order to study their growth promoter capacity in vegetables using Serrano chilli (Capsicum annuum L.) as an indicator plant. Strains were grown in culture media to determine phosphate solubilization, indole and siderophore production, and antifungal activity, three strains were included as comparison controls. In addition, a greenhouse experiment was established to determine the effect of the strains on chilli seedlings. Of the six isolated strains, five were species of the genus Pseudomonas and another was the species Rouxiella silvae. All strains solubilized phosphate being the best of them OLsSf1. In the case of indoles, the highest production corresponded to OLsSf1 and the control strain P61. The three control strains and the OLsSf3 inhibited in more than 40% the growth of Rhizoctonia sp., most of them produced siderophores. The highest seed germination (70%) was with the strain OLsSf3. Greater elongation of the radicle was observed with the strain OLsAu2.3. The OLsSf5, OLsAu1, OLsAu2.3 and the control strain A46 increased the dry weight of seedlings by more than 60%, significantly exceeding the control without inoculation. This work showed that rhizobacteria isolated from sporomes of ectomycorrhizal fungi can be used in agricultural crops such as Serrano chilli to increase seedling growth and even to overcome rhizobacteria strains isolated from cultivated plant species.

Pineda‑Mendoza DY, Almaraz JJ, Lara‑Hernandez ME, Arteaga‑Garibay R, Silva‑Rojas HV (2019). Cepas de bacterias aisladas de esporomas de hongos ectomicorrízicos promueven el crecimiento vegetal. ITEA‑Información Técnica Económica Agraria 115(1): 4‑17. https://doi.org/10.12706/itea.2018.027