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- Title
Infection of Onion by the White Rot Pathogen, <em>Sclerotium cepivorum</em>.
- Authors
Stewart, A.; Fullerton, R. A.; Sutherland, P. W.
- Abstract
Infection of onion tissue by Sclerotium cepivorum occurred from germ tubes penetrating between adjacent epidermal cell walls or directly via penetration pegs produced from slightly swollen hyphal tips or from beneath dome shaped infection cushions. After passing through the cuticle, the infection peg enlarged to form an infection hypha within the primary cell wall. Extensive degradation of the epidermal cell wall occurred, often at a distance of 2-3 cells from the advancing hyphae. As infection advanced, hyphae spread rapidly from the epidermis to the cortex growing between and within dead dying host cells. Extensive host cell death resulted in localized collapse of the tissue around the infection points. Complete colonization of the internal tissues of the root and stem base occurred within 5-7 days of inoculation.
- Subjects
FUNGI; PLANT diseases; SCLEROTIUM cepivorum; HOST-parasite relationships; WHITE rot (Onions); ONIONS
- Publication
Journal of Phytopathology, 1989, Vol 126, Issue 1, p33
- ISSN
0931-1785
- Publication type
Article
- DOI
10.1111/j.1439-0434.1989.tb01087.x