Role of Pigmentation in Protecting Aspergillus niger Conidiospores Against Pulsed Light Radiation

Authors

  • Julia Esbelin,

    1. INRA, UMR408 Sécurité et Qualité des Produits d'Origine Végétale, Avignon, France
    2. Université d'Avignon et des Pays de Vaucluse, UMR408 Sécurité et Qualité des Produits d'Origine Végétale, Avignon, France
    Search for more papers by this author
  • Sabine Mallea,

    1. INRA, UMR408 Sécurité et Qualité des Produits d'Origine Végétale, Avignon, France
    2. Université d'Avignon et des Pays de Vaucluse, UMR408 Sécurité et Qualité des Produits d'Origine Végétale, Avignon, France
    Search for more papers by this author
  • Arthur F. J Ram,

    1. Institute of Biology Leiden, Leiden University, Molecular Microbiology and Biotechnology, Kluyver Centre for Genomics of Industrial Fermentation, Leiden, The Netherlands
    Search for more papers by this author
  • Frédéric Carlin

    Corresponding author
    1. Université d'Avignon et des Pays de Vaucluse, UMR408 Sécurité et Qualité des Produits d'Origine Végétale, Avignon, France
    • INRA, UMR408 Sécurité et Qualité des Produits d'Origine Végétale, Avignon, France
    Search for more papers by this author

Corresponding author email: frederic.carlin@avignon.inra.fr (Frédéric Carlin)

Abstract

The photoprotective potential of fungus pigments was investigated by irradiating conidiospores of three Aspergillus niger strains possessing the same genetic background, but differing in their degree of pigmentation with pulsed light (PL) and monochromatic (254 nm) UV-C radiation. Spores of A. niger MA93.1 and JHP1.1 presenting, respectively, a fawn and a white pigmentation were more sensitive to PL and continuous UV-C radiation than the wild-type A. niger strain N402 possessing a dark pigment. Both spores of the dark A. niger N402 and the fawn-color mutant were equally resistant to moist heat at 56°C while spores of the white-color mutant were highly sensitive. These results indicate that melanin protects pigmented spores of A. niger from PL.

Ancillary