Effect of Host‐race Combination on Resistance of Sunflower, Helianthus annuus L., to Downy Mildew Plasmopara balstedii
作者： S. Mouzeyar , D. Tourvieille Labrouhe , F. Vear
DOI: 10.1111/J.1439-0434.1994.TB01468.X
关键词: Biology 、 Botany 、 Downy mildew 、 Cotyledon 、 Phycomycetes 、 Plasmopara 、 Sunflower 、 Plasmopara halstedii 、 Hypocotyl 、 Helianthus annuus
摘要: Study of resistance sunflower, Helianthus annuus L., to downy mildew, Plasmopara halstedii, shows that both susceptible and resistant seedlings are always infected by the fungus, then hypersensitive-like reactions occur in parenchyma necroses form around parasite. Comparison 21 incompatible combinations (resistance) extent fungus growth differs according host-race combination. With type I resistance, is limited roots lower part hypocotyl. II grows throughout whole length hypocotyl may sporulate on cotyledons
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