PHYTOCHROME MEDIATION OF UREDOSPORE GERMINATION IN THE FUNGUS <i>PUCCINIA GRAMINIS</i>

Schneider, Michael J.; Murray, B. Jean

doi:10.1111/j.1751-1097.1979.tb07815.x

Cited by 11 publications

(6 citation statements)

References 9 publications

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“…In other fungi, a variety of light-mediated responses have been reported (Tan 1978), but few red light-mediated responses have been shown both to affect sporulation and to display the far red reversibility effect characteristic of phytochrome found in higher plants. Phytochrome-like responses have been reported in Candida guilliermondii (Fraikin et al 1973), in Puccinia graminis (Lucas et al 1975, Schneider andMurray 1979), in Verticillium agaricinum (Valadon et al 1979), and in Botrytis cinerea (Tan 1974), but only in the first case have red/far red reversible absorbance changes been detected by in vivo spectrophotometry.…”

Section: Discussionmentioning

confidence: 99%

Light is required for conidiation in Aspergillus nidulans.

Mooney¹,

Yager²

1990

Genes Dev.

274

195

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Light is necessary for asexual sporulation in Aspergillus nidulans but will elicit conidiation only if irradiation occurs during a critical period of development. We show that conidiation is induced by red light and suppressed by an immediate shift to far red light. Conidiation-specific gene functions switch from light-independent to light-dependent activities coincident with the expression of brlA, a regulator of conidiophore development. We also show that light dependence is abolished by a mutation in the velvet gene, which allows conidiation to occur in the absence of light. We propose that the initiation of late gene expression is regulated by velvet and controlled by a red light photoreceptor, whose properties are reminiscent of phytochrome-mediated responses observed in higher plants.

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Section: Discussionmentioning

confidence: 99%

Light is required for conidiation in Aspergillus nidulans.

Mooney¹,

Yager²

1990

Genes Dev.

274

195

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“…For example, neither Cryptococcus neoformans nor Neurospora displays an overt response to red light, in spite of both organisms expressing one and two phytochrome genes, respectively (Idnurm and Heitman 2005a, Froehlich et al 2005). Yet, several other fungi do indeed display red light responses, including Alternaria solani (Lukens 1965), Botrytis cinerea (Tan 1974), Trichoderma atroviride (Casas-Flores et al 2004), Magnaporthe oryzae (Lee et al 2006), Puccinia graminis (Schneider and Murray 1979), Aspergillus nidulans (Bayram et al 2010, Mooney and Yager 1990, Röhrig et al 2013), and Aspergillus fumigatus (Fuller et al 2013). Among these fungi, however, only the phytochrome ortholog of A. nidulans and A. fumigatus have an established role in the light response based on the analysis of deletion mutants.…”

Section: Molecular Basis Of Light Sensing In the Kingdom Fungimentioning

confidence: 99%

Fungal photobiology: visible light as a signal for stress, space and time

2014

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Visible light is an important source of energy and information for much of life on this planet. Though fungi are neither photosynthetic nor capable of observing adjacent objects, it is estimated that the majority of fungal species display some form of light response, ranging from developmental decision making to metabolic reprogramming to pathogenesis. As such, advances in our understanding of fungal photobiology will likely reach the broad fields impacted by these organisms, including agriculture, industry and medicine. In this review, we will first describe the mechanisms by which fungi sense light and then discuss the selective advantages likely imparted by their ability to do so.

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“…The possibility that phytochrome is not restricted to photosynthetic organisms has been raised by infrequent reports of red/far-red responses in fungi and slime molds. These include sporulation in Physarum polycephalum (9), conidiation in Aspergillus nidulans (10), spore germination in both Puccinia graminis (11) and Botrytis cinerea (12), carotenogenesis in Verticillium agaricinum (13), and reproduction/UV-stability in the yeast Candida guilliermondii (14,15). While spectrophotometric evidence for phytochrome was documented in both V agaricinum (13) and C. guilliermondii (14), biochemical evidence for a phytochromerelated polypeptide in nonphotosynthetic organisms has not yet been reported.…”

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confidence: 99%

The methylotrophic yeast Pichia pastoris synthesizes a functionally active chromophore precursor of the plant photoreceptor phytochrome.

Lagarias

1996

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

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Induction of the expression of an algal phytochrome cDNA in the methylotrophic yeast Pichia pastoris led to time-dependent formation of photoactive holophytochrome without the addition of exogenous bilins. Both in vivo and in vitro difference spectra of this photochromic species are very similar to those of higher plant phytochrome A, supporting the conclusion that this species possesses a phytochromobilin prosthetic group. Zinc blot analyses confirm that a bilin chromophore is covalently bound to the algal phytochrome apoprotein. The hypothesis that P. pastoris contains phytochromobilin synthase, the enzyme that converts biliverdin IXa to phytochromobilin, was also addressed in this study. Soluble extracts from P. pastoris were able to convert biliverdin to a bilin pigment, which produced a native difference spectrum upon assembly with oat apophytochrome A. HPLC analyses confirm that biliverdin is converted to both 3E-and 3Z-isomers of phytochromobilin. These investigations demonstrate that the ability to synthesize phytochromobilin is not restricted to photosynthetic organisms and support the hypothesis of a more widespread distribution of the phytochrome photoreceptor.

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PHYTOCHROME MEDIATION OF UREDOSPORE GERMINATION IN THE FUNGUS PUCCINIA GRAMINIS

Cited by 11 publications

References 9 publications

Light is required for conidiation in Aspergillus nidulans.

Light is required for conidiation in Aspergillus nidulans.

Fungal photobiology: visible light as a signal for stress, space and time

The methylotrophic yeast Pichia pastoris synthesizes a functionally active chromophore precursor of the plant photoreceptor phytochrome.

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