The origin and development of the Pycnidium

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Identifier: origindevelopmen00kemp (find matches)
Title: The origin and development of the Pycnidium
Year: 1918 (1910s)
Authors: Kempton, F. E. (Forrest Ellwood), b. 1883
Subjects: Ascomycetes Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Macrophoma Fig. 49. M. citrulli (B. & C.) Berl. & Vogl. Two celled stage in the origin of the pycnidium, from drop culture. Simple meristogenous development. Fig. 50. The same twelve hours later. Figs. 51, 52. Early stages of other pycnidia, from drop culture. Slight variation from simple meritogenous type in that many branches are involved. Figs. 53, 54. Early stages in which much branching takes place. Drop culture. Figs. 55, 56. Early stages from petri dish culture. Figs. 57, 58. Later stages. Text Appearing After Image:
40 Plate III. Fig. 59. IT. citrulli ( B. & C.) Berl. & Vogl. Symphogenous de-velopment in which branches from a number of mainstrands interweave. Fig. 60. A later stage in which a winding of the hyphae and oelldivision has taken place forming a pseudo-parenchymousmass • Sphaeronaema Figs. 61,62,63. B. firnbriatuui ( E. & H. ) Sacc. Early stages ofthe pycnidium in which a hypha coils, branches anddivides to form a knot-like mass. Sphaeropsis Fig. 64. S. malorum Pk. An early stage in the symphogenous de-velopment in which branches a,b,c, interweave near theirends to form a ball. Fig. 65. Interwoven hyphae in early sta^e of a symphogenous de-velopment. Fig. 66. A slightly later stage. Figs. 67,68. S. oitricola McAlp. Very early stages in the originof the simple meristogenous development of pycnidia. Figs. 69,70. Slightly later stages. Figs. 71,72,73,74. Later stages with short hyphae branching fromthe masses. Figs. 75,76,77. Unusual examples of developments in which moretha

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