Efficient degradation of tannic acid by black Aspergillus species

Dynamics of dsRNA mycoviruses in black Aspergillus populations

“…The majority of strains were isolated from soils on selective media with 20% tannic acid and all colonies in a sample were treated as diVerent isolates (van Diepeningen et al, 2004). Overall, dsRNA was present in 64 (9.6%) of these isolates, meaning that with 95% conWdence the infection levels in the black Aspergilli are between 7.6% and 12%.…”

“…In total, 647 wild-type black Aspergillus strains isolated exclusively on complete medium with 20% tannic acid added (van Diepeningen et al, 2004) and 21 wild-type strains isolated on non-selective media, were used in this study. The strains originated from all over the world and were classiWed based on their mitochondrial RFLP patterns as A. niger (1a-1d), A. tubingensis (2a-2f) (Varga et al, 1993(Varga et al, , 1994b, A. japonicus and close relatives (J) (Hamari et al, 1997) or A. carbonarius and close relatives (C) (Kevei et al, 1996) (Table 1).…”

“…To detect dsRNA virus fragments in the isolates, total nucleic acids were isolated by using a phenol/chloroform extraction and run on a 0.8% agarose gel, stained with ethidium bromide and visualized with UV transillumination (van Diepeningen et al, 2004). This method separates DNA, dsRNA and single stranded RNA (ssRNA).…”

Aerobic biodegradation kinetics of tannic acid in activated sludge system

“…Moreover, it has been found that some microbes are resistant to tannins and can in fact grow with tannins as sole carbon and energy source [12][13][14][15] under proper conditions. The biodegradation performances of tannins have been studied and the effects of culture conditions as well as degradation pathways have likewise been investigated [16][17][18][19][20]. However, most of the studies were carried out using single bacteria, fungi or yeast.…”

Fungi from industrial tannins: potential application in biotransformation and bioremediation of tannery wastewaters

“…Tannins are secondary metabolites widely distributed in the plant kingdom. Plants generally contain 5-20% tannin by weight, but those ones used for tannin production may contain even up to 40% (van Diepeningen et al 2004). Most used raw materials for industrial production are chestnut wood (18% of tannin in wood on dry matter, DM), quebracho hardwood and mimosa barks (24% in both), tara pods and Chinese or Turkish gallnut (50% in both).…”