Abstract
Bean leaves inoculated with spores ofAlternaria zinniae showed small purplish brown lesions after incubation in light for 3 days. After incubation in darkness for 1–3 days necrotic spots were formed, the size of which increased with increasing length of the period of incubation in darkness. Application of culture filtrates ofA. zinniae to the leaves caused the same symptoms as did inoculation with spore suspensions.
Samenvatting
Bonebladeren, geïnoculeerd met sporen vanAlternaria zinniae, vertoonden na 3 dagen incubatie in het licht kleine paarsbruine lesies (Fig. 1A). Na incubatie gedurende 1 tot 3 dagen in het donker ontstonden necrotische vlekken (Fig. 1B), waarvan de grootte toenam met de lengte van de incubatieperiode in het donker (Tabel 1).
Toediening van cultuurfiltraten vanA. zinniae aan de bladeren veroorzaakte dezelfde symptomen als inoculatie met sporensuspensies.
De grotere vatbaarheid van bonebladeren voor deze schimmel in het donker is waarschijnlijk te wijten aan een verhoogde gevoeligheid voor een toxische stof, mogelijk zinniol, gevormd doorA. zinniae.
Similar content being viewed by others
References
Flentje, N. T., 1957. Studies on Pellicularia filamentosa (Pat.) Rogers. III. Host penetration and resistance, and strain specialization. Trans. Br. mycol. Soc. 40: 322–336.
Hassebrauk, K., 1940. Zur Frage der Wirkung der Aussenfaktoren auf verschiedene Stadien von Weizenbraunrostinfektionen. Phytopath. Z. 12: 490–508.
Heuvel, J. van den, 1969. Effects of Aureobasidium pullulans on numbers of lesions on dwarf bean leaves caused by Alternaria zinniae. Neth. J. Pl. Path. 75: 300–307.
Sempio, C., 1939. Influenza della luce e dell' oscurità sui principali periodi del parassistamento. Studio condotto su alcune malattie fungine di piante coltivate. Riv. Patol. veg., Padova 29: 1–69.
Sol, H. H., 1966. Alteration in the susceptibility of Vicia faba to Botrytis fabae by various pretreatments of the leaves. Neth. J. Pl. Path. 71: 196–202.
Starratt, A. N., 1968. Zinniol: a major metabolite of Alternaria zinniae. Can. J. Chem. 46: 767–770.
White, G. A. & Starratt, A. N., 1967. The production of a phytotoxic substance by Alternaria zinniae. Can. J. Bot. 45: 2087–2090.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Van Den Heuvel, J. The influence of light and dark on attack of bean leaves by Alternaria zinniae. Netherlands Journal of Plant Pathology 76, 192–195 (1970). https://doi.org/10.1007/BF01974330
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01974330