Pseudomonas: allies in the biocontrol of nematodes

Different species of Pseudomonas, such as P. fluorescens, P. protegens, P. putida, and P. chlororaphis, have demonstrated significant potential for nematode control, acting on multiple hosts. The mechanism of action of these bacteria involves the production of secondary metabolites that interfere with the motility, hatching, and survival of nematodes, as well as volatile compounds that reinforce the antagonistic effect. Other complementary factors include quorum sensing signaling, which activates biosynthetic genes and strengthens biofilm formation; competition and root colonization by siderophores and adhesion structures; and the production of lytic enzymes capable of degrading nematode eggs and cuticles. These actions are enhanced by the induction of systemic resistance (ISR), elevating plant defense enzymes and proteins and strengthening physical and chemical barriers. To transform laboratory results into field results in Brazil, three fronts are essential: genetic selection of ...