Regulation of periodicity and intensity of photo-induced conidiation ofTrichoderma viride

Betina, V.; Zajacová, J

doi:10.1007/bf02885575

Cited by 21 publications

(12 citation statements)

References 11 publications

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“…are returned to the dark after a pulse of light, conidiation is observed only at what was the colony perimeter at the time of the pulse. In T. viride, these results led to the conclusion that conidiation is not rhythmic but can be synchronized by a light pulse (742). Similarly, under continuous light, conidiation is not rhythmic; however, banding patterns are formed under light/dark cycles (886).…”

Section: Photobiologymentioning

confidence: 97%

“…Rhythmic conidiation can be induced in Trichoderma by periodic light treatment, but there is also evidence for a clock-dependent variation in sensitivity to light (742,743).…”

Section: Protein Kinasesmentioning

confidence: 99%

“…The morphological and physiological responses of Trichoderma to some of the cues that induce conidiation have been extensively studied for decades. The transition from mycelium to spore after the stimulus includes 5 morphogenetic stages, starting with the emergence of aerial hyphae evident by 4 h (stage 1); after 8 h hyphal branching is observed (stage 2); after 12 h phialides develop (stage 3), continuing with emergence of hyaline conidia by 16 h (stage 4) and finally, after 24 h (stage 5), conidial pigmentation and maturation take place (742). Several differences have been observed when the cue is mechanical damage, besides the 6-h delay in the developmental process, compared to light-induced conidiation.…”

Section: Asexual Developmentmentioning

confidence: 99%

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The Genomes of Three Uneven Siblings: Footprints of the Lifestyles of Three Trichoderma Species

Schmoll

Dattenböck

Carreras-Villaseñor

et al. 2016

Microbiol Mol Biol Rev

163

195

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SUMMARYThe genusTrichodermacontains fungi with high relevance for humans, with applications in enzyme production for plant cell wall degradation and use in biocontrol. Here, we provide a broad, comprehensive overview of the genomic content of these species for “hot topic” research aspects, including CAZymes, transport, transcription factors, and development, along with a detailed analysis and annotation of less-studied topics, such as signal transduction, genome integrity, chromatin, photobiology, or lipid, sulfur, and nitrogen metabolism inT. reesei,T. atroviride, andT. virens, and we open up new perspectives to those topics discussed previously. In total, we covered more than 2,000 of the predicted 9,000 to 11,000 genes of eachTrichodermaspecies discussed, which is >20% of the respective gene content. Additionally, we considered available transcriptome data for the annotated genes. Highlights of our analyses include overall carbohydrate cleavage preferences due to the different genomic contents and regulation of the respective genes. We found light regulation of many sulfur metabolic genes. Additionally, a new Golgi 1,2-mannosidase likely involved inN-linked glycosylation was detected, as were indications for the ability ofTrichodermaspp. to generate hybrid galactose-containingN-linked glycans. The genomic inventory of effector proteins revealed numerous compounds unique toTrichoderma, and these warrant further investigation. We found interesting expansions in theTrichodermagenus in several signaling pathways, such as G-protein-coupled receptors, RAS GTPases, and casein kinases. A particularly interesting feature absolutely unique toT. atrovirideis the duplication of the alternative sulfur amino acid synthesis pathway.

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Section: Photobiologymentioning

confidence: 97%

“…Rhythmic conidiation can be induced in Trichoderma by periodic light treatment, but there is also evidence for a clock-dependent variation in sensitivity to light (742,743).…”

Section: Protein Kinasesmentioning

confidence: 99%

Section: Asexual Developmentmentioning

confidence: 99%

See 1 more Smart Citation

The Genomes of Three Uneven Siblings: Footprints of the Lifestyles of Three Trichoderma Species

Schmoll

Dattenböck

Carreras-Villaseñor

et al. 2016

Microbiol Mol Biol Rev

163

195

View full text Add to dashboard Cite

show abstract

“…Similar to N. crassa, Trichoderma spp. also conidiate in the dark following light exposure; however, this response is generally considered non-circadian and strictly light-inducible (Betina & Zajacová, 1978a;Schrüfer & Lysek, 1990). More recently, an endogenous, possibly circadian, conidiation rhythm has been described in Trichoderma pleuroticola (Steyaert et al, 2010a).…”

Section: Biological Rhythmsmentioning

confidence: 99%

Reproduction without sex: conidiation in the filamentous fungus Trichoderma

et al. 2010

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2Lincoln Ventures Limited, PO Box 133, Lincoln University, Lincoln 7647, New Zealand Trichoderma spp. have served as models for asexual reproduction in filamentous fungi for over 50 years. Physical stimuli, such as light exposure and mechanical injury to the mycelium, trigger conidiation; however, conidiogenesis itself is a holistic response determined by the cell's metabolic state, as influenced by the environment and endogenous biological rhythms. Key environmental parameters are the carbon and nitrogen status and the C : N ratio, the ambient pH and the level of calcium ions. Recent advances in our understanding of the molecular biology of this fungus have revealed a conserved mechanism of environmental perception through the White Collar orthologues BLR-1 and BLR-2. Also implicated in the molecular regulation are the PacC pathways and the conidial regulator VELVET. Signal transduction cascades which link environmental signals to physiological outputs have also been revealed.

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“…also conidiate in the dark following a light exposure, however this response is considered non-circadian. Betina & Zajacová (1978) and Schrü fer & Lysek (1990) investigated whether Trichoderma cultures could conidiate rhythmically following a dose of light and concluded that no circadian rhythm was apparent and conidiation was strictly lightinducible. Deitzer et al (1988) investigated circadian rhythms in Trichoderma atroviride, formerly Trichoderma harzianum (Kindermann et al 1998).…”

Section: Introductionmentioning

confidence: 99%