Oliveira et al., Phytochemistry Letters 15 (2016) 152–158
Plants react to aggressions through different defence responses. Mechanical barriers consist in the increase of production and deposition of substances capable of containing pathogen invasion. Chemical
barriers consist in the increase of concentration or activity of defence proteins and synthesis of phenolic
compounds and phytoalexins. Elicitor substances have been widely used in plant disease control showing
impressive results and a low impact to the environment and man. This review contains information about plant defence mechanisms and shows the use of inducers of resistance in the control of pathogens and
prospects of advance towards sustainable agriculture.