Citric acid production by the diploid strains of Aspergillus niger obtained by protoplast fusion

Kotaro Kirimura, Iwao Nakajima, Sung Pyo Lee, Seiichiro Kawabe, Shoji Usami

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    Diploid strains were obtained following protoplast fusion between two citric acid producers of Aspergillus niger, one for the solid culture and the other for the shaking culture. In the shaking culture, all the diploid strains exhibited lower productivities than one parental strain. However, in the solid culture, some diploid strains exhibited higher productivities than either parental strain; the best diploid strain produced 1.2 times as much citric acid as the parental strain in solid culture.

    Original languageEnglish
    Pages (from-to)504-506
    Number of pages3
    JournalApplied Microbiology and Biotechnology
    Issue number5-6
    Publication statusPublished - 1988 Feb


    ASJC Scopus subject areas

    • Microbiology (medical)
    • Microbiology
    • Bioengineering
    • Biotechnology

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