Biodiversity and biocontrol ability of Trichoderma natural populations in soil vineyards from Castilla y León region (Spain)
Trichoderma is a microorganism present in many agricultural soils and some of its species could be used as natural biological control agents. In this work, the presence of natural populations of Trichoderma was estimated in soil vineyard and its biocontrol capacity against Phaeoacremonium minimum, one of the main agent causals of grapevine trunk diseases instead of using pesticides. Moreover, physicochemical variables in soil such as pH, organic matter and nutrients were evaluated to determine a possible correlation to natural populations of Trichoderma.
Ten different plots were selected from Castilla y León region in order to estimate the natural presence of Trichodermain soil vineyards. Samples were collected during winter at 10-30 cm depth. After, the presence of Trichoderma and main physical and chemical characteristics were evaluated in these soils. Moreover, in vitro tests of Trichoderma were done against P. minimum.
This work showed that Trichoderma soil abundance was higher in a vineyard from PDO Bierzo and none Trichoderma was found in 2 vineyards from PDO Ribera del Duero. A Principal Component analysis was performed to evaluate the possible relationship to physicochemical values of soil and presence of Trichoderma. We obtained that extractable iron was positively correlated (p<0.05) to Trichoderma populations in soil and pH was negatively correlated (p<0.05) to the presence of Trichoderma in soil. Also, autochthonous strains showed a significant in vitro biocontrol against the pathogen P. minimum.
These results indicate that populations of Trichoderma in soil could be used as biological control agents in soil and are influenced by abiotic conditions.
Thanks to Pago de Carraovejas winery and the project LOWPHWINE, reference IDI-20210391.
1) Carro-Huerga. et al. (2023) Vineyard Management and Physicochemical Parameters of Soil Affect Native Trichoderma Populations, Sources of Biocontrol Agents against Phaeoacremonium minimum. Plants 2023, 12(4), 887, https://doi.org/10.3390/plants12040887
Issue: ICGWS 2023
1Grupo de Investigación de Ingeniería y Agricultura Sostenible. Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad, Universidad de León Av. Portugal 41, 24071 León, España.
2Grupo Universitario de Investigación en Ingeniería y Agricultura Sostenible (GUIIAS), Área de Microbiología, Escuela de Ingeniería Agraria y Forestal, Campus de Ponferrada, Universidad de León, Avenida Astorga s/n, 24400 Ponferrada, Spain