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Softwood biodegradation by an ascomycete Chrysonilia sitophila (TFB 27441 strain)
Author(s) -
Ferraz A.,
Baeza J.,
Duránt N.
Publication year - 1991
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.1991.tb00576.x
Subject(s) - softwood , biodegradation , sawdust , radiata , lignin , nitrogen , pinus radiata , strain (injury) , chemistry , thermogravimetric analysis , solubility , degradation (telecommunications) , botany , nuclear chemistry , biology , organic chemistry , telecommunications , vigna , anatomy , computer science
Biodegradation of softwood ( Pinus radiata ) by the ascomycete Chrysonilia sitophila was dependent on the nitrogen and glucose concentrations in the culture medium. Optimization studies of the delignification process, in which the nitrogen (0–50mmol/l NH + 4 ) and glucose (0–2%) concentrations were varied, showed a maximal value of 17·8% for sawdust degradation in cultures containing 10 mmol/l NH 4 + and 1·0% glucose. Solubility of the decayed sawdust in 1% NaOH at maximal delignification conditions showed a threefold increase and changes in the thermogravimetric pattern were also observed. Biodegraded wood chips showed significant decreases of the 280 and 310 nm characteristic lignin bands in the u.v. reflectance spectra.