Bioprospecting of microorganisms with growth-promoting potential in lettuce (Lactuca sativa)
DOI:
https://doi.org/10.33837/msj.v9i1.1758Keywords:
inoculants, growth-promoting microorganisms, bioinputs, L. sativaAbstract
Lettuce (Lactuca sativa L.) is a widely cultivated vegetable crop whose productivity can be affected by edaphoclimatic factors and the presence of soilborne pathogens. In this context, the use of beneficial microorganisms has emerged as a sustainable alternative to promote plant growth and reduce dependence on chemical inputs. This study aimed to carry out the bioprospecting of microorganisms and evaluate their efficiency in seed inoculation and in the development of curly lettuce (Lactuca sativa) var. Crispa. Microorganisms were isolated from soil and root samples collected in different anthropized environments in the municipality of Cristalina, Goiás, Brazil. A fungal isolate belonging to the genus Trichoderma, obtained from areas near waterfalls, was selected. Based on this isolate, seed inoculation and substrate application assays were conducted to evaluate germination potential and plant development. Treatments were tested at concentrations of 2.0 × 10⁸ and 4.5 × 10⁹ CFU mL⁻¹, including a commercial isolate of Trichoderma harzianum as a standard, as well as a control without application. The experiment was conducted in a completely randomized design with four treatments and ten replicates. No statistically significant differences (p > 0.05) were observed among treatments for germination and agronomic traits, such as number of leaves, plant height, and shoot fresh mass. Nevertheless, the Trichoderma isolate shows potential for future studies under different conditions and crops, aiming at its use as a sustainable agricultural bioinput.
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Copyright (c) 2026 Raissa Cristiny Pereira Silva, Davy Odair Pedroso Aguiar , Marcos Vinícius MArques, Miriam Almeida Marques
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