In addition to the action of Copper, Chitosan adds the activation of powerful metabolic pathways complementary to those activated by Copper. These complementary pathways converge in producing defense and growth promotion substances. Chitosan, in contact with plant tissue promotes the transcription of defense proteins, such as, for example, phytoalexins, which are the antibodies of plants, also anti-stress proteins, which aim to provide stability in photosynthetic activity and also produce the strengthening of the plant.