PMID: 9438355Jan 1, 1997Paper

Influence of calcium on fungal growth, hyphal morphology and citric acid production in Aspergillus niger

Folia Microbiologica
Licia Maria Pera, D A Callieri

Abstract

Addition of 0.5 g/L CaCl2 to the fermentation medium lowered the final biomass dry mass by 35% and increased the uptake of phosphate and sucrose, and the production of citric acid by 15, 35 and 50%, respectively. In a medium deprived of Ca2+ the microorganism displayed both a pelleted and a filamentous form of growth, the hyphae being scarcely branched, without bulbous cells. An addition of Ca2+ induced a pelleted form of growth, highly branched hyphae and numerous bulbous cells. Bulbous cells growing in the presence of Ca2+ exhibited cell walls composed of laminated layers, and featured vesicles associated with the wall and/or the cell membrane, containing numerous inclusions. The cytotoxic effect of high concentrations of citric acid in the medium as well as an increase of the activity of N-acetyl-beta-D-glucosaminidase, a lytic enzyme, might be involved in these morphological changes.

Citations

Jul 28, 2006·Applied Microbiology and Biotechnology·Sikander Ali
Jun 12, 2013·Applied Microbiology and Biotechnology·Rossana LiguoriVincenza Faraco
Mar 31, 2004·Bioresource Technology·Haq Ikram-UlJaved Iqbal
May 29, 2013·New Biotechnology·Jonas NymanMohammad J Taherzadeh
Nov 5, 2014·Journal of Zhejiang University. Science. B·Wei HuWen-jian Li
Mar 30, 2010·FEMS Microbiology Letters·Drew J Hawranik, John L Sorensen
Feb 11, 2012·Toxicology and Industrial Health·Mesut TaskinUmit Incekara
Jan 19, 2010·Journal of Basic Microbiology·Veronica Leticia ColinLicia Maria Pera
May 20, 2020·Frontiers in Bioengineering and Biotechnology·Hai-Yan ZhouYu-Guo Zheng
Jun 18, 2021·Scientific Reports·Maria Elena AntinoriAthanassia Athanassiou
Nov 1, 2005·Microbiological Research·Ambujom Saraswathy, Rolf Hallberg

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