The Septal Pores of Coprinus lagopus in Relation to Nuclear Migration

Giesy, Robert M.; Day, Peter

doi:10.2307/2439942

Cited by 54 publications

(38 citation statements)

References 6 publications

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“…Characteristic of basidiomycete hyphae are the complex dolipore septa between each cell which normally form a barrier to nuclear movement (Girbardt, 1961;Moore & McAlear, 1962). When nuclear migration is occurring in a monokaryon, these complex dolipore septa are disrupted to give simple septa through which nuclei may pass easily (Giesy & Day, 1965). Once established, the dikaryon has dolipore septa and nuclear migration is restricted to the clamp connexions.…”

Section: Discussionmentioning

confidence: 99%

A Mitochondrial Mutant of Coprinus lagopus

Casselton¹,

Condit²

1972

Journal of General Microbiology

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Section: Discussionmentioning

confidence: 99%

A Mitochondrial Mutant of Coprinus lagopus

Casselton¹,

Condit²

1972

Journal of General Microbiology

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“…Since sclerotia arise from a parent mycelium the ultrastructural features of vegetative hyphae are also considered. Some aspects of vegetative hyphal structure have already been reported (Marchant, Peat and Banbury, 1966;Geisy and Day, 1965;Casselton, Lewis and Marchant, 1971). …”

Section: Introductionmentioning

confidence: 87%

“…Cells of the aerial mycelium represented the simplest condition, upon which secondary changes were imposed. Vegetative hyphal cells were separated by the characteristic dolipore septa (Geisy and Day, 1965) (Plate i. No.…”

Section: Colony Structurementioning

confidence: 99%

STRUCTURE OF AERIAL AND SUBMERGED SCLEROTIA OF COPRINUS LAGOPUS

1975

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SUMMARYSclerotia were formed in both aerial and submerged parts of the mycelium. In addition a layer of cells with pigmented thick walls (called brown matting) which differentiated at the air/agar interface was interpreted as an aspect of sclerotial behaviour since it was regularly formed by strains which produced submerged sclerotia and was composed of cells of similar structure to those of the outermost layer of the submerged sclerotium. Apart from producing sclerotia and oidiospores the cells of the aerial mycelium remained undifferentiated. In contrast, cells of the submerged mycelium, though initially indistinguishable from those of aerial hyphae, became individually differentiated within about 5 days of growth producing two further novel cell types; inflated cells containing glycogen, and hyaline thick-walled cells. Submerged sclerotia were pale brown in colour, irregularly shaped and about 0.5-1.0 mm in diameter. The only structure which differentiated the submerged sclerotium from the submerged mycelium was the outer rind, a layer of cells with thick, pigmented walls. The central (medulla) region contained the same cell types in the same frequencies as the general submerged mycelium. In sharp contrast the aerial sclerotia were highly organized structures composed of distinct and compact tissues. Mature aerial sclerotia were dark brown to black spheroidal structures up to 0.5 mm in diameter. An outer layer of dead and moribund hyphae surrounded the main body of the sclerotium which was bilayered with an outer rind and inner medulla. The rind was multilayered and consisted of small cells with thick pigmented walls; intercellular spaces were cuticularized. The medulla was a closely packed tissue composed predominantly of hyaline thick-walled cells of the same type as were encountered in the submerged mycelium.

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“…There I had the good fortune to meet Robert Giesy, an electron microscopist, whom I persuaded to look at Coprinus hyphae to see if they had the dolipore septa that had earlier been described in other higher basidiomy-cetes. They were present, and we were ahle to sh ow that the B locus is resp onsible for the diss oluti on of the pore structures to facilitate nuclear migrati on in Coprinus (21). After a year in Ohi o, 1 went to Connecticut and there returned to plant path ogens.…”

Section: Some Other Systemsmentioning

confidence: 99%

Plant Pathology and Biotechnology: Choosing Your Weapons

1992

Annu. Rev. Phytopathol.

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In this chapter I trace some threads of personal history and comment on the nature of host resistance and pathogen virulence, aspects of plant pathology that have interested me for most of my career. Basic research in plant pathology is more fashionable, and certainly more fundable, than in the days when practical considerations of disease control dominated the work of most plant pathologists. There is still a great deal of this basic research to do. Satisfying your curiosity is fun, but if you can do something useful for society at the same time it is even more rewarding.

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The Septal Pores of Coprinus lagopus in Relation to Nuclear Migration

Cited by 54 publications

References 6 publications

A Mitochondrial Mutant of Coprinus lagopus

A Mitochondrial Mutant of Coprinus lagopus

STRUCTURE OF AERIAL AND SUBMERGED SCLEROTIA OF COPRINUS LAGOPUS

Plant Pathology and Biotechnology: Choosing Your Weapons

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