Differential accumulation of defense-related isoflavonoids in hypocotyls/roots of common bean (Phaseolus vulgaris L.) cultivars treated with salicylic acid and structurally related compounds

ABSTRACT: Hypocotyls/roots of four (anthracnose-resistant: ICA Quimbaya and CORPOICA 106; anthracnose-susceptible: Cargamanto Rojo and Cargamanto Mocho) common bean cultivars treated with salicylic acid (SA) as elicitor, were analyzed to determine the capacity for synthesizing defense-related isoflavonoids. Time-course and dose-response studies indicated that the maximum levels of isoflavonoids, occurred at 1.45 mM SA and between 96 and 144 h post-induction. Overall, anthracnose-resistant cultivars produced the defense-related isoflavonoids to superior amounts than the susceptible ones. Additionally, crude isoflavonoid extracts from SA-treated tissues cvs. ICA Quimbaya and Cargamanto Rojo displayed higher inhibitory effect against C. lindemuthianum than those from water-treated tissues. A comparison of the isoflavonoid-eliciting activity of a series of structurally-related compounds to SA revealed that isoflavonoid production may be differentially controlled. Acetyl-salicylic acid showed the best isoflavonoid-inducing effect. Results might be useful for crop protection programs through the selecting of common bean cultivars with better prospects of disease resistance, and the development of better isoflavonoid-eliciting agents.

• Autores: Durango Restrepo, Diego Luis; Pulgarín, Natalia; Gil González, Jesús; Escobar Peláez, Gustavo; Echeverri López, Luis Fernando; Quiñones Fletcher, Winston
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2014
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/22181
• Acceso en línea: http://hdl.handle.net/10495/22181
• Palabra clave: Coumestrol; Cumestrol; Elicitor; Time-course experiments; Dose-response profile; C. lindemuthianum
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/2.5/co/