Mexican Journal
of Phytopathology

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• Phytopathological note

Biostimulant effect of native Trichoderma strains on the germination of four varieties of basil

By Juanita Guadalupe Hollman Aragón, Mirella Romero Bastidas*, Pablo Misael Arce Amezquita, Alejandro Palacios Espinosa

* Corresponding Author. Email: - / Institution: Universidad Autónoma de Baja California Sur

Accepted: 09/December/2023 – Published: 19/December/2023 – DOI: https://doi.org/10.18781/R.MEX.FIT.2303-1

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Abstract Objetive/antecedents. Trichoderma is an efficient tool as biostimulant in basil crop. However, only few species have been studied in specific cultivars. Therefore, the objective of this research was to evaluate the biostimulant efficacy of native Trichoderma strains on the germination and growth of four varieties of basil.

Materials and Methods. Seven strains of Trichoderma (T. asperellum, atroviride, viride, longibrachiatum, harzianum, koningii and Trichoderma sp.), a commercial Trichoderma (T. harzianum), synthetic fertilizer (T17) and the control were used in the study. 30 seeds of the Purple Ruffles, Lemon, Siam Queen and Nufar varieties were treated with a spore suspension of each Trichoderma. 48 h later, the seeds were sown and incubated at 28 °C with a 12 h light/dark photoperiod. The variables evaluated were; Rate and percentage of germination, biomass and length of seedlings.

Results. T. atroviride presented the greatest biostimulant effect on germination (95%). While T. asperellum registered an increased efficiency in biomass (≥ 0.120 g) and length (≥ 1.0 cm) of the plant in the four varieties. The action of commercial T. was lower in all cases.

Conclusion. This study demonstrated that the native strains of Trichoderma have a biostimulant effect on plants and are more effective than commercial species.

Keywords: Antagonist, in vitro, vegetative growth

Figure 1. Biostimulating action of native Trichodermas in the percentage of germinated seeds of four varieties of basil

Figure 2. Main Trichoderma treatments with the highest positive (1st. and 2nd. photo from the left) or negative response (3rd. photo on the right) in the growth of four basil cultivars

Table 1. Morphometric parameters of basil Var. Purple Ruffles seedlings against the effect of different Trichoderma isolates

Table 2. Morphometric parameters of basil Var. Lemon against the effect of different Trichoderma isolates.

Table 3. Morphometric parameters of basil Var. Siam Queen against the effect of different Trichoderma isolates

Table 4. Morphometric parameters of basil Var. Nufar against the effect of different Trichoderma isolates