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Lesovoy, M. P.; Marchenko, O. A.
Archiv für Phytopathologie und Pflanzenschutz, 19/8/1/, Letnik: 32, Številka: 3Journal Article
Our investigation is devoted to special histology features of phomopsis of sunflower. The results indicates that infectious process induces active intrusion of ascospores of pathogen Diaporthe helianthi into plant leaves due to development of simple appressoria on the ends of germ tubes and intrusion of fungal hyphae directly through cell walls into plant tissues. This indicates insignificant contribution of leaf anatomy into resistance to the pathogen. In plants whose genotypes are characterized by the resistance, thickening of vessel walls as well as development of dark gum-like plugs were detected. Possibly, these elements respesent barriers for spread of fungus all over the plant.
