Morphogenesis in <i>Schizophyllum commune</i>. I. Effects of White Light

Perkins, John H.

doi:10.1104/pp.44.12.1706

Cited by 36 publications

(24 citation statements)

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“…In contrast with this result, monokaryotic mycelia of strain fise, which were able to form monokaryotic fruiting bodies in the light (5), formed no fruiting bodies in the dark. The result that light is essential for fruiting body formation has also been obtained in other species of basidiomycetes (15)(16)(17)(18)(19)(20). The monokaryotic mycelia of strain ftEE began to acquire the ability to form fruiting bodies 4 days after inoculation.…”

Section: Formation Of Monokaryotic Fruiting Bodies Slant Culturesmentioning

confidence: 63%

The Effect of Light on Fruiting Body Formation and Adenosine 3′:5′-Cyclic Monophosphate Metabolism in Coprinus macrorhizus

Uno

Yamaguchi

Ishikawa

1974

Proc. Natl. Acad. Sci. U.S.A.

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Section: Formation Of Monokaryotic Fruiting Bodies Slant Culturesmentioning

confidence: 63%

The Effect of Light on Fruiting Body Formation and Adenosine 3′:5′-Cyclic Monophosphate Metabolism in Coprinus macrorhizus

Uno

Yamaguchi

Ishikawa

1974

Proc. Natl. Acad. Sci. U.S.A.

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“…Light is important for conidiation in many strains of fungi, including the chestnut blight fungus Cryphonectria parasitica, A. nidulans (Mooney and Yager 1990), and for the formation of fruiting bodies in Schizophyllure (Perkins 1969); yet, all of these fungi grow well in the absence of light. It thus seems likely that light is being used as an overt environmental cue to stimulate development at appropriate times; hence, it seems likely that circadian rhythms may be found in these and other systems to be a covert cue, initiating aspects of growth and development in the absence of light and potentiating the developmental system to respond to light.…”

Section: Discussionmentioning

confidence: 99%

The Neurospora circadian clock-controlled gene, ccg-2, is allelic to eas and encodes a fungal hydrophobin required for formation of the conidial rodlet layer.

Bell-Pedersen¹,

Dunlap²,

Loros³

1992

Genes & Development

213

180

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The Neurospora crassa clock-controlled gene (ccg-2) is transcriptionally activated by the circadian clock in a time-of-day-specific manner. Transcript and sequence analyses of ccg-2 reveal that the predicted Ccg-2 polypeptide bears significant similarity to a class of low-molecular-weight, cysteine-rich, hydrophobic proteins (hydrophobins), first identified in Schizophyllum, and including the product of the developmentally regulated Aspergillus gene, rodletless, required for spore surface rodlets. Allelism between ccg-2 and easily wettable (eas) (one of the first developmental genetic loci identified in Neurospora) was predicted on the basis of this similarity, their close genetic linkage, and previous findings demonstrating that eas mutants lack rodlets. In this study allelism is confirmed experimentally by showing that (1) transformation of an eas mutant strain with ccg-2 DNA results in phenotypic complementation, including restoration of surface rodlets, (2) inactivation of the ccg-2 gene, by RIP, results in an eas phenotype including loss of rodlet fascicles, and (3) the original eas strain has dramatically reduced levels of ccg-2 mRNA. Thus, the clock-controlled ccg-2 gene encodes an integral component of fungal asexual spores important for spore dispersal. The dramatic reduction of ccg-2 expression in the eas mutant has no apparent effect on the normal operation of the circadian clock, confirming that there is no feedback of this clock output on the oscillator itself. These data, in conjunction with the previous observation that ccg-2 is light induced, serve to focus attention on the dual interacting role of light and the circadian clock in the regulation of fungal spore development.[Key Words: Clock-controlled gene; ccg-2; easily wettable., hydrophobins; rodlets; circadian clock] Received August 13, 1992; revised version accepted September 15, 1992.Circadian rhythms are biological rhythms that are present in most, if not all, eukaryotes (Dunlap 1990). Daily fluctuations in cellular and organismal activities are controlled by an endogenous oscillator, commonly referred to as the biological clock. The clock exerts its effects on a wide variety of processes ranging from asexual spore formation in the ascomycete Neurospora crassa and the control of cell division in the marine protist Gonyaulax to photosynthesis in plants and cognitive functions in people (for review, see Edmunds 1988). However, at all phylogenetic levels, clocks appear to be assembled at the level of intracellular regulation and not intercellular communication. Thus, simple eukaryotes provide appropriate and powerful systems for molecular genetic analysis of this phenomenon.Of the eukaryotes known to possess a well-defined circadian clock, the filamentous fungus N. crassa provides an ideal model system for clock analysis {for review, see Feldman and Dunlap 1983;Dunlap 1990; Lakin-Thomas tCorresponding authors. et al. 1990). Advantages include an easily measurable circadian rhythm in developmental potential (rhythmic formation of aerial hy...

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“…Photomorphogenesis has been studied in a wide variety of these organisms (Perkins, 1969;Corrochano and Cerdà-Olmedo, 1992;Chory, 1993;Wessels, 1993;Lauter, 1996). In the ascomycete Neurospora crassa blue light controls different phases of sexual and asexual differentiation.…”

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confidence: 99%

Photoregulation ofcot-1,a Kinase-Encoding Gene Involved in Hyphal Growth inNeurospora crassa

Lauter¹,

Marchfelder

Russo

et al. 1998

Fungal Genetics and Biology

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Morphogenesis in Schizophyllum commune. I. Effects of White Light

Cited by 36 publications

References 4 publications

The Effect of Light on Fruiting Body Formation and Adenosine 3′:5′-Cyclic Monophosphate Metabolism in Coprinus macrorhizus

The Effect of Light on Fruiting Body Formation and Adenosine 3′:5′-Cyclic Monophosphate Metabolism in Coprinus macrorhizus

The Neurospora circadian clock-controlled gene, ccg-2, is allelic to eas and encodes a fungal hydrophobin required for formation of the conidial rodlet layer.

Photoregulation ofcot-1,a Kinase-Encoding Gene Involved in Hyphal Growth inNeurospora crassa

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