Indução da fitoalexina faseolina em variedades crioulas de feijoeiro submetidos a eliciadores à base de aloe vera e ascophyllum nodosum

Abstract

The use of biotic elicitors has gained prominence in disease management due to their ability to stimulate the natural defense mechanisms of plants. This study evaluated the potential of aloe vera (Aloe vera) extracts, seaweed (Ascophyllum nodosum), and plant-derived compounds in inducing the phytoalexin phaseolin in creole bean seeds collected from different regions of Brazil, belonging to the Carioca, Preto, Mulatinho, Roxo, and Azuki groups. The experiment was conducted at UFFS, Erechim Campus, in March 2026, under a completely randomized design, using ten varieties subjected to eight treatments, including fermented aloe extract (FPE), Amino Sea Boost (ASB), aqueous aloe extract (EAB), aloin, and their combinations. In the germination test, the Paranasinho, Azuki, and Carioca cultivars showed the highest indices. A significant interaction was observed between genotype and elicitor. The combination FPE + ASB stood out in the Carioca-branco cultivar from Salvador/BA, whereas isolated FPE and ASB treatments were more effective in the same cultivar originating from Erechim/RS. The Carioca-vermelho bean from Encruzilhada do Sul/RS showed a significant response compared to the control when subjected to the FPE + saponin treatment. The Azuki bean exhibited lower responsiveness to the treatments. The results demonstrate a dependence between variety and inducer, indicating that processed formulations present greater stability and potential in inducing plant defense mechanisms in bean seeds.