Sporogenic Substances Isolated from Fungi

Trione, E. J.; Leach, Charles M.; Mutch, Judith T.

doi:10.1038/212163a0

Cited by 68 publications

(35 citation statements)

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“…On the contrary to the experiments of Trione et al 21), however, colonies grown on the media containing these fungal extracts in the dark showed less sporulation than the control. Thus it was not appeared that the near-UV absorbing substances acted directly on sporulation or were sporogenic by themselves.…”

Section: Spectroscopiccontrasting

confidence: 94%

Effect of Near-Ultraviolet Irradiation on Sporulation by Pyricularia oryzae Cavara on Cultural Media

Ahn

Chung

1974

Jpn. J. Phytopathol.

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Section: Spectroscopiccontrasting

confidence: 94%

Effect of Near-Ultraviolet Irradiation on Sporulation by Pyricularia oryzae Cavara on Cultural Media

Ahn

Chung

1974

Jpn. J. Phytopathol.

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“…Previous work by Pirttila et al [19] suggests that the adenosine secretion of endophytes microorganisms may play an important role in the morphological development of the host plant and therefore, it could be playing a role in the secondary metabolism of the endophytes microorganism. In the case of mycosporins, extremophilic microcolonial fungi have been described to constitutively synthesize considerable amounts of mycosporins, also known to be involved in morphogenesis and sporulation [20][21][22]. Many reports regarding different yeast species indicate the ability of these fungi to synthesize mycosporin-like amino acids, which have been also proposed to reflect phylogenetic relationships among species, suggesting their utility in yeast systematics.…”

Section: Dothiora Sp Biomarkers Related To Growth Morphologymentioning

confidence: 99%

“…These pieces were surfacedisinfected sequentially through washing with 95% ethanol (30 s), 25% household bleach (1 min) and 95% ethanol (30 s). 10 pieces of each vegetal sample were aseptically transferred to a Petri dish with In the case of mycosporins, extremophilic microcolonial fungi have been described to constitutively synthesize considerable amounts of mycosporins, also known to be involved in morphogenesis and sporulation [20][21][22]. Many reports regarding different yeast species indicate the ability of these fungi to synthesize mycosporin-like amino acids, which have been also proposed to reflect phylogenetic relationships among species, suggesting their utility in yeast systematics.…”

Section: Isolation Cultures and Characterizationmentioning

confidence: 99%

Multicomponent Analysis of the Differential Induction of Secondary Metabolite Profiles in Fungal Endophytes

et al. 2016

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Small molecule histone deacetylase (HDAC) and DNA methyltransferase (DNMT) inhibitors are commonly used to perturb the production of fungal metabolites leading to the induction of the expression of silent biosynthetic pathways. Several reports have described the variable effects observed in natural product profiles in fungi treated with HDAC and DNMT inhibitors, such as enhanced chemical diversity and/or the induction of new molecules previously unknown to be produced by the strain. Fungal endophytes are known to produce a wide variety of secondary metabolites (SMs) involved in their adaptation and survival within higher plants. The plant-microbe interaction may influence the expression of some biosynthetic pathways, otherwise cryptic in these fungi when grown in vitro. The aim of this study was to setup a systematic approach to evaluate and identify the possible effects of HDAC and DNMT inhibitors on the metabolic profiles of wild type fungal endophytes, including the chemical identification and characterization of the most significant SMs induced by these epigenetic modifiers.

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“…Wavelengths near 310 ηm, provided by black light, stimulate sporulation of A. solani and the conidiophores do not revert to vegetative hyphae when exposed to the dark, allowing conidial formation (Aragaki et al, 1973). Some authors have speculated that photoreceptor pigments could be involved in inducing or inhibiting sporulation by certain wavelengths (Leach, 1965;Trione & Leach, 1966;Honda & Nemoto, 1984). A compound called P310 ("Photoreceptor" 310) was obtained from sporulating colonies of A. chrysanthemi grown under black light, but not from non-sporulating colonies grown in the dark (Leach, 1965).…”

Section: The Adapted and Validated Protocol Allowed Efficient Inductimentioning

confidence: 99%

“…A compound called P310 ("Photoreceptor" 310) was obtained from sporulating colonies of A. chrysanthemi grown under black light, but not from non-sporulating colonies grown in the dark (Leach, 1965). The authors postulated that this compound could also play a role in sporulation of A. dauci (Trione & Leach, 1966). The chemical structure and the function of P310 have not yet been determined.…”

Section: The Adapted and Validated Protocol Allowed Efficient Inductimentioning

confidence: 99%

In vitro production of conidia of Alternaria solani

Rodrigues¹,

Maffia²,

Dhingra³

et al. 2010

Trop. plant pathol.

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Sporulation of Alternaria solani can be scarce and is often reduced when the fungus is cultivated in vitro. A series of experiments were conducted to assess the effects of moisture, mycelial wounding, light quality and photoperiod, and culture media on conidial production. A procedure to induce sporulation based on mycelial wounding and dehydration was adapted and validated. Best results were obtained when fungal colonies were grown in V8 medium at 25 o C in the dark with agitation for seven days; the mycelium mass was ground, poured into potato dextrose agar (pH 6.5) in plates, and incubated at 25 ± 2 o C under near ultraviolet light and 12 h-photoperiod. The procedure was validated with 30 isolates of A. solani from different hosts, sampling locations, ages, and storage conditions. Conidial production, germination, and infectivity were quantified. Seventy-five percent of the isolates sporulated and the lowest germination rate was 68%. Inoculations of conidial suspension of all isolates resulted in lesions on tomato and potato plants. The effect of subculturing on A. solani sporulation was also assessed. After six subcultures, every seven days, there was no reduction in sporulation of colonies that were induced with the protocol. Key words: early blight, biphasic technique, subculture, infection frequency. RESUMO Produção in vitro de conídios de Alternaria solaniA esporulação de Alternaria solani in vitro pode ser escassa e tende a reduzir após sucessivas repicagens. Conduziram-se vários experimentos para avaliar o efeito da umidade, injúria da colônia, qualidade de luz e fotoperíodo, bem como do meio de cultura na produção de conídios. Adaptou-se a técnica bifásica para induzir esporulação, por meio de injúria de micélio e desidratação do meio de cultura. Obtiveram-se melhores resultados quando colônias cresceram em meio V8 a 25 o C, no escuro, sob agitação durante sete dias; a massa de micélio foi triturada e a suspensão depositada em meio BDA (pH 6,5) em placas de Petri, incubando-se a 25 ± 2 o C, sob luz negra com 12 h de fotoperíodo. Validou-se o protocolo para 30 isolados de A. solani distintos quanto ao hospedeiro, local de origem, idade e forma de armazenamento. Quantificaram-se a produção, germinação e infectividade de conídios. Dos 30 isolados, 75% esporularam e a germinação mínima de conídios foi de 68%. Todos os isolados foram patogênicos em seus respectivos hospedeiros. Avaliou-se, também, o efeito de repicagens sucessivas na esporulação. Todos os isolados produziram conídios após seis repicagens sucessivas. Palavras chave: pinta preta, técnica bifásica, subcultura, frequência de infecção.

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Sporogenic Substances Isolated from Fungi

Cited by 68 publications

References 5 publications

Effect of Near-Ultraviolet Irradiation on Sporulation by Pyricularia oryzae Cavara on Cultural Media

Effect of Near-Ultraviolet Irradiation on Sporulation by Pyricularia oryzae Cavara on Cultural Media

Multicomponent Analysis of the Differential Induction of Secondary Metabolite Profiles in Fungal Endophytes

In vitro production of conidia of Alternaria solani

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