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van Leeuwen MR, Krijgsheld P, Wyatt TT, et al. The effect of natamycin on the transcriptome of conidia of Aspergillus niger. Stud Mycol. 2012;74(1):71-85doi: 10.3114/sim0013.
van Leeuwen, M. R., Krijgsheld, P., Wyatt, T. T., Golovina, E. A., Menke, H., Dekker, A., Stark, J., Stam, H., Bleichrodt, R., Wösten, H. A., & Dijksterhuis, J. (2013). The effect of natamycin on the transcriptome of conidia of Aspergillus niger. Studies in mycology, 74(1), 71-85. https://doi.org/10.3114/sim0013
van Leeuwen, M R, et al. "The effect of natamycin on the transcriptome of conidia of Aspergillus niger." Studies in mycology vol. 74,1 (2013): 71-85. doi: https://doi.org/10.3114/sim0013
van Leeuwen MR, Krijgsheld P, Wyatt TT, Golovina EA, Menke H, Dekker A, Stark J, Stam H, Bleichrodt R, Wösten HA, Dijksterhuis J. The effect of natamycin on the transcriptome of conidia of Aspergillus niger. Stud Mycol. 2013 Mar 15;74(1):71-85. doi: 10.3114/sim0013. Epub 2012 Sep 24. PMID: 23449730; PMCID: PMC3563292.
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Stud Mycol. 2013 Mar 15;74(1):71-85. doi: 10.3114/sim0013. Epub 2012 Sep 24.

The effect of natamycin on the transcriptome of conidia of Aspergillus niger.

Studies in mycology

M R van Leeuwen, P Krijgsheld, T T Wyatt, E A Golovina, H Menke, A Dekker, J Stark, H Stam, R Bleichrodt, H A B Wösten, J Dijksterhuis

Affiliations

  1. Applied and Industrial Mycology, CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands.

PMID: 23449730 PMCID: PMC3563292 DOI: 10.3114/sim0013

Abstract

The impact of natamycin on Aspergillus niger was analysed during the first 8 h of germination of conidia. Polarisation, germ tube formation, and mitosis were inhibited in the presence of 3 and 10 μM of the anti-fungal compound, while at 10 μM also isotropic growth was affected. Natamycin did not have an effect on the decrease of microviscosity during germination and the concomitant reduction in mannitol and trehalose levels. However, it did abolish the increase of intracellular levels of glycerol and glucose during the 8 h period of germination.Natamycin hardly affected the changes that occur in the RNA profile during the first 2 h of germination. During this time period, genes related to transcription, protein synthesis, energy and cell cycle and DNA processing were particularly up-regulated. Differential expression of 280 and 2586 genes was observed when 8 h old germlings were compared with conidia that had been exposed to 3 μM and 10 μM natamycin, respectively. For instance, genes involved in ergosterol biosynthesis were down-regulated. On the other hand, genes involved in endocytosis and the metabolism of compatible solutes, and genes encoding protective proteins were up-regulated in natamycin treated conidia.

Keywords: Aspergillus niger; antibiotics; conidia; germination; natamycin; transcriptome

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