Plant biostimulants are substances that can increase plant germination growth, and development, acting on the stimulation of cell division. This study aimed to evaluate the in vitro action of two commercial biostimulants AgroRaiz® and Stimulate® on the physiological quality of seeds of Phaseolus vulgaris cultivar TAA Marhe. Seeds of the TAA Marhe cultivar were used at the usual concentration of both biostimulants AgroRaiz® 0.3 L 100 kg-1 and Stimulate® 0.5 L 100 kg-1 seeds. Classic germination test, dry matter, root length and accelerated aging test were performed. The experimental design was completely randomized with three treatments and four replications. The usual doses of biostimulators did not influence the germination rate and dry mass by the classical method; however, Stimulate® demonstrated action on mean root length. For the aging assay, AgroRaiz® proved to be superior to Stimulate® in germination and seedling dry matter.
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