Influence of light-enhanced glycoalkaloids on resistance of potato tubers toFusarium sulphureumandFusarium solanivar.coeruleum

Autor:	G. C. Percival, M. S. Karim, Geoffrey Richard Dixon
Rok vydání:	1998
Předmět:	Fusarium biology Inoculation Tubercle fungi food and beverages Plant Science Horticulture Plant disease resistance biology.organism_classification Spore Fusarium sulphureum Glycoalkaloid Botany Genetics Agronomy and Crop Science Solanaceae
Zdroj:	Plant Pathology. 47:665-670
ISSN:	1365-3059 0032-0862
DOI:	10.1046/j.1365-3059.1998.00284.x
Popis:	Increases in resistance to Fusarium sulphureum and Fusartium solani var. coeruleum were determined in seed tubers of cultivars Desiree, Pentland Hawk and Kerr's Pink with light-enhanced glycoalkaloids. Glycoalkaloid concentration in the tubers ranged from 78.0 to 885.9 mg kg−1 fresh weight. Exposure of tubers to light prior to inoculation decreased fungal invasion, the greater reductions generally reflecting longer light exposure periods. In most cases, no direct relationship between resistance and glycoalkaloid concentrations was recorded for F. sulphureum. Surface infection indices and reduced depth of rot caused by F. solani var. coeruleum were closely correlated with tuber glycoalkaloid content. No significant effects on spore length and width were recorded. Exposure to light of seed tubers that are not destined for human or animal consumption could provide a pretreatment to reduce fungal invasion by F. sulphureum and F. solani var. coeruleum.
Databáze:	OpenAIRE
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