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Origin of Tyloses in Melon (Cucumis Melo L.) in Response to a Vascular Fusarium

Origin of Tyloses in Melon (Cucumis Melo L.) in Response to a Vascular Fusarium The cells abutting the vessels in the primary xylem of healthy melon exhibit the characteristics of contact cells. These cells also produce a protective layer and transfer-cell-like thickenings. The primary wall is partially if not totally hydrolysed at the level of the pits. After infection by Fusarium oxysporum f. sp. melonis Sn. ' H., the contact cells of resistant plants show a strong cytoplasmic activity leading to the growth of tyloses into the lumen of abutting vessels. Such tylosis formation occurs rapidly and is helped by the material stored in the ingrowths of the protective layer which is reorganised into the single wall of the tylosis. The primary wall bursts and disappears during tylosis formation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png IAWA Journal Brill

Origin of Tyloses in Melon (Cucumis Melo L.) in Response to a Vascular Fusarium

El Mahjoub, M.; Le Picard, D.; Moreau, M.
IAWA Journal , Volume 5 (4): 5 – Jan 1, 1984
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0928-1541
eISSN
2294-1932
DOI
10.1163/22941932-90000417
Publisher site
See Article on Publisher Site

Abstract

The cells abutting the vessels in the primary xylem of healthy melon exhibit the characteristics of contact cells. These cells also produce a protective layer and transfer-cell-like thickenings. The primary wall is partially if not totally hydrolysed at the level of the pits. After infection by Fusarium oxysporum f. sp. melonis Sn. ' H., the contact cells of resistant plants show a strong cytoplasmic activity leading to the growth of tyloses into the lumen of abutting vessels. Such tylosis formation occurs rapidly and is helped by the material stored in the ingrowths of the protective layer which is reorganised into the single wall of the tylosis. The primary wall bursts and disappears during tylosis formation.

Journal

IAWA Journal – Brill

Published: Jan 1, 1984

Keywords: Cell wall ultrastructure; contact cells; Cucumis melo L; Fusarium oxysporum f. sp. melonis ; protective layer; transfer cells; tylosis; xylem

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