Ultrastructure of collarette formation in Fusarium sect. Liseola and some taxonomic implications

Transactions of the British Mycological Society Pub Date : 1988-06-01 DOI:10.1016/S0007-1536(88)80003-2

L.R. Tiedt, W.J. Jooste

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引用次数: 8

Abstract

Collarette characteristics have not played a significant role in Fusarium taxonomy. The ultrastructural characteristics of first conidium formation on phialides of F. annulatum, F. anthophilum, F. fujikuroi, F. moniliforme, F. proliferatum, F. subglutinans and F. succisae have been studied by transmission electron microscopy. The outer wall of the phialide covers the first microconidium and does not constitute any part of the wall of the conidium. This results in enteroblastic conidiogenesis of the first conidium. The apical portion of the outer wall disintegrates and the remnants constitute the collarette. The phialide of F. moniliforme has a thin and delicate collarette while those of the other species are more robust to varying degrees. F. fujikuroi differs significantly from F. moniliforme in collarette characteristics to preclude the suggested synonymy between these species. Further taxonomic implications are discussed.

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镰刀菌属植物叶结形成的超微结构及其分类学意义

结叶特征在镰刀菌分类中未起重要作用。用透射电子显微镜研究了F. annulatum、F. anthophilum、F. fujikuroi、F. moniliformme、F. proliferatum、F. subglutinans和F. succisae等植物花梗上第一分生孢子形成的超微结构特征。所述圆柱的外壁覆盖所述第一微分生孢子，且不构成所述分生孢子壁的任何部分。这导致第一个分生孢子的肠母细胞分生。外壁的顶端部分瓦解，残余物构成颈圈。念珠单胞菌的羽盖薄而细腻，而其他种类的羽盖则不同程度地坚固。fujikuroi F. fujikuroi与F. moniliforme在collarette特征上有显著差异，从而排除了这些物种之间的同义词。进一步讨论了分类学意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Transactions of the British Mycological Society

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