Temperature Effects on the Disease Reactions of Sunflower to Infection by Orobanche cumana

Three virulent populations (CU194, SE193, and SE194) of the parasitic plant Orobanche cu-mana were inoculated onto four lines (KA-41, J-8281, HA-89, and RHA-273) of sunflower (Helianthus annuus L.). Pots were transferred to growth chambers set at 15, 19, 23, and 27°C. Emergence of broomrape plants a...

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Veröffentlicht in:Plant disease. - 1997. - 85(2001), 5 vom: 01. Mai, Seite 553-556
1. Verfasser: Sukno, S (VerfasserIn)
Weitere Verfasser: Fernández-Martínez, J M, Melero-Vara, J M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2001
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article differential lines resistance genes
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520 |a Three virulent populations (CU194, SE193, and SE194) of the parasitic plant Orobanche cu-mana were inoculated onto four lines (KA-41, J-8281, HA-89, and RHA-273) of sunflower (Helianthus annuus L.). Pots were transferred to growth chambers set at 15, 19, 23, and 27°C. Emergence of broomrape plants and infection incidence were determinants of disease reaction. All broomrape populations were pathogenic to the sunflower lines KA-41, HA-89, and RHA-273, although differences in virulence were found. At 15 to 23°C, the populations of broomrape infected these three sunflower lines, but a delay in emergence of broomrape was found at 15°C; whereas, at 27°C, the level of infection was restricted. Only population CU194 infected the resistant line J-8281, with infection occurring mainly at 23 and 27°C, but few broomrape plants emerged. Our results suggest that the effect of temperature on the host-parasite relationship is complex 
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700 1 |a Melero-Vara, J M  |e verfasserin  |4 aut 
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