An Electron-Microscope Study of Germination of Conidia of Botrytis cinerea

Hawker, Lilian E.; Hendy, R.

doi:10.1099/00221287-33-1-43

Cited by 61 publications

(27 citation statements)

References 6 publications

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“…They have provided information on the structural changes which occur during germination (Lowry and Sussman 1968 ;Hawker and Hendy 1963;Marchant 1966a;Remsen et al 1967;Hemmes and Hohl 1969;Richmond and Pring 1971) on the apical organization of the hyphal tip (McClure et al 1968; Bartnicki-Garcia et al 1968) and on wall differentiation (Bartnicki-Garcia 1969 ;Grove et al 1970;Heath et al 1971).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural changes in the conidia of Penicillium notatum during germination

Martı́n¹,

Uruburu²,

Villanueva³

1973

Can. J. Microbiol.

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1973. Ultrastructural changes in the conidia of Penicilliurn notarllrn during germination. Can. J. Microbiol. 19: 797-801.To study the changes in the cell wall of Penicilliurn notaturn during germination, thin sections of resting, swollen, and germinating spores, and mycelium were compared with thin sections of the isolated cell walls. In the cell wall of resting spores four distinct layers were found. The outermost layer of the cell wall of resting spores was released during swelling and the two inner layers were extended to form the cell wall of the germ tube. The cell wall of young germ tubes had only two layers but a new electrondense layer was formed later on the outside. Mycelial cell walls which appeared thinner than those of conidia showed three distinct layers. Large mitochondria that divide during germination were present in both resting and swollen spores. Two different types of vacuoles were found, both of which decreased in size and in number during germination. Endoplasmic reticulum was almost absent in resting spores but increased substantially during swelling. MARTIN, J. F., F. URUBURU et J. R. VILLANUEVA. 1973. Ultrastructural changes in the conidia of Perricilliurn notatum during germination. Can. J. Microbiol. 19: 797-801. Pour ttudier les changements dans la paroi cellulaire de Penicillirlrn trotaturn au cours de la germination, nous avons cornpart des sections minces de spores au repos, en renflement et en germination, et de myctlium, avec des sections minces de parois cellulaires isoltes. Dans la paroi cellulaire des spores au repos, nous trouvons quatre couches distinctes; la couche la plus exttrieure est libtrte au cours du renflement, et les deux couches internes sont etendues pour former la paroi cellulaire du tube germinatif. La paroi cellulaire des jeunes tubes germinatifs a seulement deux couches, mais une nouvelle couche dense aux tlectrons est formte plus tard vers l'exttrieur. Les parois cellulaires du myctlium, lesquelles apparaissent plus minces que celles des conidies, montrent trois couches distinctes. Des grosses mitochondries, qui se divisent au cours de la germination, sont prtsentes dans les spores au repos, aussi bien que dans celles en renflement. Nous trouvons deux difftrents types de vacuoles, les deux dtcroissent en grosseur et en nornbre au cours de la germination. Le r6ticulum endoplasmique est presqu'absent dans les spores au repos, mais accroit substantiellement au cours du renflement.[Traduit par le journal]

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Section: Introductionmentioning

confidence: 99%

Ultrastructural changes in the conidia of Penicillium notatum during germination

Martı́n¹,

Uruburu²,

Villanueva³

1973

Can. J. Microbiol.

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“…Germlings treated with pronase lacked extracellular material, and it was assumed that a protein was required for adhesion [12,13]. Similar mucilage-like materials have been reported in fungi prior to appressorial formation [2,20,21,28,42,44,55]. Gold and Mendgen [16] showed a fibrillar exudate extending laterally on the epidermis 211m away from U. appendiculatus germ tubes and appressoria.…”

Section: Adhesive Materials From Germ Tubes Appressoria and Hyphaementioning

confidence: 85%

Extracellular Materials of Fungal Structures: Their Significance at Prepenetration Stages of Infection

Kunoh

Nicholson

Kobayashi

1991

Electron Microscopy of Plant Pathogens

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“…Similar septa are formed shortly after emergence of the germ tube in A. brnssicicoln (Campbell 1970), Botrytis spp. (Hawker and Hendy 1963;Richmond and Pring 1971), and two-celled pycnidiospores of B. theobrornne (Wergin et 01. 1973).…”

Section: Discussionmentioning

confidence: 97%

“…A similar fibrillar layer occurs around germ tubes of Botrytis spp. (Hawker and Hendy 1963;Richmond andPring 1971) andA. brassicicola (Campbell 1970).…”

Section: Discussionmentioning

confidence: 99%

Ultrastructure of conidium germination of Cochliobolus carbonus

Murray¹,

Maxwell²

1974

Can. J. Bot.

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Multiseptate conidia of Cochliobolus carbonus germinate in water by one or two polar germ tubes. The septa between cells within a conidium contain a central pore, which is plugged before germination but open during germination, so that all cells are interconnected. During germination, vacuoles enlarge, endoplasmic reticulum profiles increase in number, and mitochondria change from a spherical form with loosely arranged cristae to an elongated form with closely packed cristae. The conidium wall consists of an inner electron-translucent layer and an outer electron-opaque layer. The germ tube wall is continuous with the innermost layer of the conidium wall. Shortly after germination, a septum with a central pore forms in the germ tube by invagination where it emerges from the conidium. The germ tube wall is surrounded by a fibrillar sheath. The presence of apical vesicles in the germ tube tip is confirmed. The associations of Woronin bodies with septal pores and microbodies, of lipids with vacuoles, and of microbodies with lipids and vacuoles are discussed.

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An Electron-Microscope Study of Germination of Conidia of Botrytis cinerea

Cited by 61 publications

References 6 publications

Ultrastructural changes in the conidia of Penicillium notatum during germination

Ultrastructural changes in the conidia of Penicillium notatum during germination

Extracellular Materials of Fungal Structures: Their Significance at Prepenetration Stages of Infection

Ultrastructure of conidium germination of Cochliobolus carbonus

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