Impact of solid medium composition on the conidiation in Penicillium camemberti

Krasniewski, Isabelle; Molimard, Pascal; Féron, Gilles; Vergoignan, Catherine; Durand, Alain; Cavin, Jean-François; Cotton, Pascale

doi:10.1016/j.procbio.2006.01.005

Cited by 29 publications

(18 citation statements)

References 39 publications

(46 reference statements)

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“…Many studies have been dedicated to the relation of nutritional effect on conidiogenesis. Krasniewski et al (2006) reported that nitrogen starvation is a better inducer of conidiogenesis than carbon starvation, finally achieving faster conidiogenesis. Relying on the C/N (carbon/nitrogen) ratio of the three media (calculations based on the nutrient compositions described below), as a possible index of nutrient starvation, the C/N ratios of whey permeate agar (23/1) and millet agar (18/1) were higher than that of 1 = 4 SDAY (4/1).…”

Section: Discussionmentioning

confidence: 99%

Effects of culture media on hydrophobicity and thermotolerance of Bb and Ma conidia, with description of a novel surfactant based hydrophobicity assay

Skinner

Hata

Parker

2010

Journal of Invertebrate Pathology

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Section: Discussionmentioning

confidence: 99%

Effects of culture media on hydrophobicity and thermotolerance of Bb and Ma conidia, with description of a novel surfactant based hydrophobicity assay

Skinner

Hata

Parker

2010

Journal of Invertebrate Pathology

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“…MC has been described in a large number of fungal species (Anderson and Smith 1971;Bacon and Hinton 1991;Lapaire and Dunkle 2003;Ahearn et al 2007) and it has also been studied from a practical point of view to ensure the synchronized production of large amounts of conidia of different strains in the shortest possible time for industrial or other mass production purposes (e.g., Cascino et al 1990;Maheshwari 1999;Krasniewski et al 2006). In all these cases, MC was defined as the production of conidia on a spore without any, or only a minimal, involvement of hyphal growth.…”

mentioning

confidence: 99%

“…In some industrially or otherwise important fungi, the nutritional and/or environmental factors necessary for a synchronized MC in artificial conditions are well-known (e.g., Cascino et al 1990;Krasniewski et al 2006). In other fungi, where MC has been reported, but not studied in detail, almost nothing is elucidated in this respect (e.g., Lapaire and Dunkle 2003;Ahearn et al 2007).…”

mentioning

confidence: 99%

Microcyclic conidiogenesis in powdery mildews and its association with intracellular parasitism by Ampelomyces

et al. 2009

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Microcyclic conidiogenesis (MC), a process defined as the production of conidia on a spore without any, or only a minimal, involvement of hyphal growth, has recently been reported in a little known powdery mildew species, Oidium longipes. To investigate whether this was an isolated case or it is a more general phenomenon in powdery mildew fungi, germinating conidia of eight species of the Erysiphales were examined using light microscopy. The following species were included in this work: Erysiphe necator on grapevine, Blumeria graminis f. sp. hordei on barley, Podosphaera xanthii on cucumber, Erysiphe sp. on Ligustrum vulgare, O. longipes on Petunia x grandiflora, O. neolycopersici on tomato, Golovinomyces cichoracearum on Rudbeckia laciniata and Sawadaea sp. on Acer negundo. In all these species, up to 4% of the germinated conidia exhibited MC.Moreover, when colonies of E. necator and O. neolycopersici, on detached grapevine and tomato leaves, respectively, were treated with a conidial suspension of Ampelomyces, the intracellular pycnidia of these mycoparasites appeared in microcyclic conidiophores. This represents a yet undescribed method of accelerating asexual reproduction in this mycoparasite. In the life cycle of powdery mildews, the importance of MC is still not clear but it should be taken into consideration when conidial germination is studied on the host surface for purposes such as epidemiology or species identification.

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“…Nitrogen starvation, a better inducer of conidiogenesis than carbon starvation [25], can achieve faster conidiogenesis, followed by providing enough time for conidial maturation. Maturation of conidia can be significantly involved in thermotolerance, which is supported by the fact that old, matured conidia have more rodlet proteins which are responsible for thermotolerance in the rodlet layer [2,15].…”

Section: Discussionmentioning

confidence: 99%

Production of thermotolerant entomopathogenic fungal conidia on millet grain

Kim

Kassa

Skinner

et al. 2010

J Ind Microbiol Biotechnol

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Thermotolerance of entomopathogenic (insect-killing) fungi should be seriously considered before industrialization. This work describes the feasibility of millet grain as a substrate for production of thermotolerant Beauveria bassiana (Bb) GHA and ERL1170 and Metarhizium anisopliae (Ma) ERL1171 and ERL1540 conidia. First, conidial suspensions of the Bb isolates, produced on millet grain in polyethylene bags, were exposed to five temperatures (43-47 °C) at 15-min intervals for up to 120 min (experiment I). Agar-based quarter-strength (¼) Sabouraud dextrose agar supplemented with yeast extract (SDAY) and whey permeate media served as controls. Millet-grain-based culture was superior in producing the most thermotolerant Bb conidia, followed by whey permeate agar and ¼SDAY-based cultures. Secondly, to compare the thermotolerance of conidia produced at the same conditions, the Bb isolates were then produced on agar-based millet powder medium, with ¼SDAY and whey permeate agar media as controls, and the two Ma isolates were added (experiment II). They were then exposed to the same temperatures as above. More thermotolerant Bb and Ma conidia were produced on millet powder agar than on whey permeate agar and ¼SDAY overall. These results suggest that millet grain can be used as a substrate to produce thermotolerant conidia in a mass production system.

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Impact of solid medium composition on the conidiation in Penicillium camemberti

Cited by 29 publications

References 39 publications

Effects of culture media on hydrophobicity and thermotolerance of Bb and Ma conidia, with description of a novel surfactant based hydrophobicity assay

Effects of culture media on hydrophobicity and thermotolerance of Bb and Ma conidia, with description of a novel surfactant based hydrophobicity assay

Microcyclic conidiogenesis in powdery mildews and its association with intracellular parasitism by Ampelomyces

Production of thermotolerant entomopathogenic fungal conidia on millet grain

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