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SALINAS PALMIERI MarÍa cecilia
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Título:
Differential response to Penicillium allii infections among argentine garlic cultivars
Autor/es:
MARÍA CECILIA SALINAS; MORALES A.; FERNÁNDEZ A.; GALMARINI C.; PABLO F. CAVAGNARO
Lugar:
Nigde
Reunión:
Simposio; VII International Symposium on Edible Alliaceae; 2015
Institución organizadora:
ISHS
Resumen:
Worldwide, one of the main economic losses in garlic (Allium Sativum L.) production is blue mold disease, caused by Penicillium allii. Previously, partial resistance against P. allii was reported in Argentine garlics, as evaluated in inoculated actively growing plants. However, a large proportion of the garlic infections with P. allii are produced during the conservation and packaging of garlics, where bulbs are dormant. In this study, we evaluated P. allii infections in dormant cloves of 11 Argentine garlic cultivars, monitoring the fungal growth in terms of ?colony area? (CA) and ?spore production? (SP). To this end, garlic cloves were peeled, surface sterilized and inoculated with 3*105 spores, and incubated for 12 days at 25 ° C in darkness. Significant variation in colony area (P=0.002) and number of conidia per clove (P=0.0014) was found, and both variables were significantly correlated (r=0.77). The most tolerant cultivars, i.e., those showing weakest infections were Morado INTA, Perla INTA and Castaño INTA, whereas Fuego INTA and Gran Fuego INTA were most susceptible. These results are in general agreement with our previous results in metabolically active plants indicating Morado and Fuego as the tolerant and susceptible extremes, respectively. Ongoing analyses of thiosulfinates and polyphenols content in these garlic bulbs (these compounds were previously reported as antimicrobial agents) may shed light regarding possible associations between these compounds and resistance