11 Photomorphogenesis and Gravitropism in Fungi

Corrochano, Luis M.; Galland, Paul

doi:10.1007/978-3-319-25844-7_11

Cited by 9 publications

(5 citation statements)

References 248 publications

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“…Different fungal species use light as a signal to regulate developmental transitions such as the germination of spores or conidia, the growth of vegetative hyphae, and the development of sexual or vegetative reproductive structures. In addition, light regulates fungal metabolism and enzyme biosynthesis and, in some fungi, directs the growth of reproductive structures (phototropism)-similar to the tropic growth of plants seeking light to optimize photosynthesis (38,40,78,140). An excess of light can be harmful owing to the damaging effect of UV radiation on DNA and the production of reactive oxygen species, and fungi use light as a signal to activate defensive mechanisms such as antioxidant enzymes and DNA repair enzymes and to accumulate protective pigments such as carotenes and melanin (4,57).…”

Section: Introductionmentioning

confidence: 99%

“…For example, phototropism of the fruiting body of Phycomyces blakesleeanus is detected after a few minutes of unilateral illumination (40). Other photoresponses may take hours or days to visualize, as is the case for accumulating carotenoid pigments in N. crassa (43) and for developing reproductive structures in many fungi (38,78,140). Most fungi see blue light, but some fungi can see red light, green light, and even UV light (40,78,140).…”

Section: Introductionmentioning

confidence: 99%

“…These examples remind us of our ignorance about the origin and evolution of light perception in fungi, and they reflect the magnitude of the task that lies ahead in our effort to understand the role of light in fungal biology.In this article I review the most relevant aspects of fungal photobiology. Interested readers can complement this text with a selection of recent reviews (38,51,57,78,140).…”

mentioning

confidence: 99%

“…In this article I review the most relevant aspects of fungal photobiology. Interested readers can complement this text with a selection of recent reviews (38,51,57,78,140).…”

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confidence: 99%

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Light in the Fungal World: From Photoreception to Gene Transcription and Beyond

Corrochano

2019

Annu. Rev. Genet.

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Fungi see light of different colors by using photoreceptors such as the White Collar proteins and cryptochromes for blue light, opsins for green light, and phytochromes for red light. Light regulates fungal development, promotes the accumulation of protective pigments and proteins, and regulates tropic growth. The White Collar complex (WCC) is a photoreceptor and a transcription factor that is responsible for regulating transcription after exposure to blue light. In Neurospora crassa, light promotes the interaction of WCCs and their binding to the promoters to activate transcription. In Aspergillus nidulans, the WCC and the phytochrome interact to coordinate gene transcription and other responses, but the contribution of these photoreceptors to fungal photobiology varies across fungal species. Ultimately, the effect of light on fungal biology is the result of the coordinated transcriptional regulation and activation of signal transduction pathways.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

“…In this article I review the most relevant aspects of fungal photobiology. Interested readers can complement this text with a selection of recent reviews (38,51,57,78,140).…”

mentioning

confidence: 99%

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Light in the Fungal World: From Photoreception to Gene Transcription and Beyond

Corrochano

2019

Annu. Rev. Genet.

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“…In the fungi, gravitropism has been demonstrated in the multicellular Basidiomycota [ 21 ] and the Mucorales [ 22 ]. However, gravity-sensing organelles have only been examined in the Mucoralean Phycomyces blakesleeanus [ 23 ] where giant single-celled sporangiophores exhibit gravitropism through a combination of buoyant lipid globules and sedimenting protein crystals that form within vacuoles [ 24 ]. A crystal-less mutant grows normally, but displays defective gravitropism, indicating that the crystals indeed serve as gravity sensors [ 24 – 26 ].…”

Section: Introductionmentioning

confidence: 99%

Evolutionary novelty in gravity sensing through horizontal gene transfer and high-order protein assembly

Nguyen¹,

Greig²,

Khan³

et al. 2018

PLoS Biol

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Horizontal gene transfer (HGT) can promote evolutionary adaptation by transforming a species’ relationship to the environment. In most well-understood cases of HGT, acquired and donor functions appear to remain closely related. Thus, the degree to which HGT can lead to evolutionary novelties remains unclear. Mucorales fungi sense gravity through the sedimentation of vacuolar protein crystals. Here, we identify the octahedral crystal matrix protein (OCTIN). Phylogenetic analysis strongly supports acquisition of octin by HGT from bacteria. A bacterial OCTIN forms high-order periplasmic oligomers, and inter-molecular disulphide bonds are formed by both fungal and bacterial OCTINs, suggesting that they share elements of a conserved assembly mechanism. However, estimated sedimentation velocities preclude a gravity-sensing function for the bacterial structures. Together, our data suggest that HGT from bacteria into the Mucorales allowed a dramatic increase in assembly scale and emergence of the gravity-sensing function. We conclude that HGT can lead to evolutionary novelties that emerge depending on the physiological and cellular context of protein assembly.

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