The toxicity of jack bean [Canavalia ensiformis (L.) DC.] canatoxin to plant pathogenic fungi

• Autor(a) principal: OLIVEIRA,A. E. A.
• Data de Publicação: 1999
• Outros Autores: GOMES,V. M., SALES,M. P., FERNANDES,K. V. S., CARLINI,C. R., XAVIER-FILHO,J.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Brasileira de Biologia (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100008
• topic: Canavalia ensiformis; jack bean seeds; canatoxin; phytopathogenic fungi

Protein fractions obtained from seeds of the jack bean (Canavalia ensiformis) as well as the amino acid canavanine, present in these seeds, were tested for their capacity to inhibit the growth of the phytopathogenic fungi Macrophomina phaseolina, Colletotrichum gloesporioides, Sclerotium rolfsii and Fusarium oxysporum. We found that most of the proteins examined and also canavanine did not have any effect on the growth of these fungi. On the other hand the toxic protein canatoxin was found to be effective, at a concentration of 2%, in the inhibition of the growth of M. phaseolina, C. gloesporioides and S. rolfsii.