Uso de diferentes gelificantes e de um esterilizante em cultura de segmentos nodais de batata-doce

Abstract

Sweet potato culture has a high potential for human and animal feeding; and for this last purpose the branches can be used as hay. Is a high yield root, rich in nutrients which occupy marginal crop lands. The propagation is highly vegetative using branches or shoots from roots, what can affect it by disseminating pathogens. The main objective of this work was to evaluate the effect of gelling agents and a systemic disinfectant in sweet potato tissue culture. Two experiments were done; one with different doses of gelling agents (Agar and Phytagel®) and another with a response curve of isothiazolinones (Kathon®CG). Shoots and roots Length and dry weight, their development rates; biochemical parameters as proline accumulation and Superoxide Dismutase were evaluated. Sweet potato did not respond to different gelling agents, and the recommendation is to use the low cost effective. Kathon®CG reduced the growth in the different concentrations. The return to the medium without Kathon®CG improved the plantlet growth.