Native Trichoderma harzianum strains from Argentina produce indole-3 acetic acid and phosphorus solubilization, promote growth and control wilt disease on tomato (Solanum lycopersicum L.)

BADER, ARACELI; SALERNO, GRACIELA L.; COVACEVICH, F.; CONSOLO, V. F.

Saudi Journal of Biolgical Sciences

Elsevier

Año: 2019

1018-3647

richodermafungiareconsideredassuitablebiofertilizers,sincetheycouldincreasetheefficiencyoftheuseof nutrients in plants and are used as biocontrol agents against plant pathogen. The aim of this study was tocharacterize a set ofTrichodermastrains isolated from horticultural and near-pristine soils from theArgentine Pampas, and to evaluate their potentiality as a growth promoter and as a biocontroller ofFusariumwilt disease on tomato. Nineteen collected strains, identified asT. brevicompactum, T. gamsiiandT. harzianum, were tested for their ability to produce the auxin indole 3-acetic acid (IAA), solubilizephosphate and biocontrolF. oxysporum. Twelve strains reduced growth of pathogenic fungus over 50%and four of them (named FCCT 16, FCCT 58, FCCT 199-2 and FCCT 363-2) exhibited IAA highest production(ranging 13.38?21.14mg/ml) and were able to solubilize phosphate (ranging 215.80?288.18mg/ml of cal-cium phosphate). Tomato plants inoculated with those four strains increased chlorophyll content, shootlength, fresh and dry weight of shoot and roots, and reducedF. oxysporumwilt disease between 10 and30%. On the basis of our results, we conclude that soils of the Argentine Pampas harborTrichodermastrainswith beneficial dual effects which could be of interest for the development of commercial products.Ó2019 Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open accessarticle under the CC BY-NC-ND license