anatomy of the avocado pedicel and the localization of Diplodia mycelium

Avocado fruit is often attacked during softening by Diplodia natalensis, which causes stem-end rot. The pedicel anatomy and the localization of the fungal mycelium in various tissues were studied in artificially inoculated pedicels. Mycelium was found to be present in most tissues of the pedicel. Ve...

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Bibliographic Details
Published in:Botanical gazette (Chicago, Ill.) Ill.), 1970-03, Vol.131 (1), p.50-54
Main Authors: Arzee, T, Cohen, Y, Schiffmann-Nadel, M
Format: Article
Language:English
Subjects:
botany
Epidermis
Fruits
Fungi
Mycelium
Parenchyma
Pedicels
Pith
Plant Science and Plant Products
plants
Sclereids
Starches
Tannins
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Summary:Avocado fruit is often attacked during softening by Diplodia natalensis, which causes stem-end rot. The pedicel anatomy and the localization of the fungal mycelium in various tissues were studied in artificially inoculated pedicels. Mycelium was found to be present in most tissues of the pedicel. Vessel elements of the pedicel seem to serve as the main route of fungal penetration. In the vessels the mycelium advances mainly via perforation plates and to some extent through pits. The intrusion into fibers, sclereids, and parenchyma cells is similarly through pits. The anatomy of the pedicel and that of the stem were compared.
ISSN:0006-8071
1940-1205
DOI:10.1086/336511