Lignin degradation by Phanerochaete chrysosporium in hyperbaric oxygen

1980 ◽  
Vol 26 (9) ◽  
pp. 1168-1171 ◽  
Author(s):  
Ian D. Reid ◽  
Keith A. Seifert
Keyword(s):  
Phanerochaete Chrysosporium ◽  
Hyperbaric Oxygen ◽  
Lignin Degradation ◽  
Inhibitory Factor ◽  
Aspen Wood

Phanerochaete chrysosporium degraded aspen wood lignin as well in 2 atm O2 (1 atm = 101.325 kPa) as in 1 atm O2, but 3 atm O2 inhibited the fungus, and O2 pressures above 4 atm killed it. Lignin degradation in 5 atm of air was similar to that in 1 atm of O2, indicating that O2 concentration, not pressure, was the inhibitory factor. The selectivity with which P. chrysosporium metabolised lignin in preference to other wood components did not increase at O2 pressures above 1 atm.

Water-soluble products from the degradation of aspen lignin by Phanerochaete chrysosporium

1982 ◽  
Vol 60 (11) ◽  
pp. 2357-2364 ◽  
Author(s):  
Ian D. Reid ◽  
Garth D. Abrams ◽  
James M. Pepper
Keyword(s):  
Phanerochaete Chrysosporium ◽  
Lignin Degradation ◽  
Degradation Products ◽  
Water Soluble ◽  
Soluble Form ◽  
Gel Chromatography ◽  
Aspen Wood ◽  
Radioactive Materials ◽  
Absorbing Materials ◽  
Lignin Degradation Products

When Phanerochaete chrysosporium degrades [14C] lignin-labelled aspen wood in static liquid culture, it releases almost as much 14C in water-soluble form as in 14CO2. Water-soluble ultraviolet-absorbing materials also accumulate in cultures that are degrading lignin. The water-soluble radioactive materials appear to be intermediates in lignin degradation, because they can be further metabolized to CO2 and because the soluble materials labelled during [14C] lignin degradation are distinct from the materials labelled during [14C] glucose metabolism. These lignin degradation products can be fractionated by gel chromatography and are mostly acidic.

Lignin degradation by Phanerochaete chrysosporium in agitated cultures

1985 ◽  
Vol 31 (1) ◽  
pp. 88-90 ◽  
Author(s):  
Ian D. Reid ◽  
Ema E. Chao ◽  
Peter S. S. Dawson
Keyword(s):  
Phanerochaete Chrysosporium ◽  
Lignin Degradation ◽  
Water Soluble ◽  
Aspen Wood ◽  
Ligninolytic Activity ◽  
Wood Particles

Contrary to previous reports, cultures of Phanerochaete chrysosporium agitated on a gyrotory shaker degraded synthetic lignin to CO2 approximately as rapidly and extensively as static cultures. Agitated cultures also degraded the lignin in aspen wood to CO2 and water-soluble products as well as static cultures, if the wood particles became enmeshed in the mycelium. An atmosphere of oxygen stimulated lignin degradation, compared with air, in both agitated and static cultures. The mycelia in agitated cultures with ligninolytic activity formed single, large pellets.

The influence of nutrient balance on lignin degradation by the white-rot fungus Phanerochaete chrysosporium

1979 ◽  
Vol 57 (19) ◽  
pp. 2050-2058 ◽  
Author(s):  
Ian D. Reid
Keyword(s):  
Phanerochaete Chrysosporium ◽  
Lignin Degradation ◽  
Nutrient Balance ◽  
White Rot ◽  
Phosphate Limitation ◽  
White Rot Fungus ◽  
Aspen Wood ◽  
Nitrogen Levels ◽  
Carbon:Nitrogen Ratio ◽  
Lignin Metabolism

The degradation by Phanerochaete chrysosporium of "natural" lignin in aspen wood, like synthetic lignin, was inhibited by nitrogen and stimulated by carbohydrate. Nitrogen delayed the appearance and reduced the level of ligninolytic activity and indirectly hastened its decline by accelerating depletion of the carbohydrate supply. The carbon:nitrogen ratio of the medium was a better predictor of lignin degradation than the absolute carbohydrate and nitrogen levels. Unlike nitrogen limitation, sulphate and phosphate limitation of growth did not stimulate lignin metabolism.

scholarly journals Effects of supplementation with phosphorus, calcium and manganese during oil palm frond fermentation by Phanerochaete chrysosporium on ligninase enzyme activity

2020 ◽  
Vol 21 (5) ◽  
Author(s):  
Roni Pazla ◽  
Novirman Jamarun ◽  
Fauzia Agustin ◽  
Mardiati Zain ◽  
Arief Arief ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Phanerochaete Chrysosporium ◽  
Oil Palm ◽  
Manganese Peroxidase ◽  
Crude Protein ◽  
Lignin Degradation ◽  
Lignin Content ◽  
Oil Palm Frond ◽  
Range Test ◽  
Palm Frond

Abstract. Pazla R, Jamarun N, Agustin F, Zain M, Cahyani NO. 2020. Effects of supplementation with phosphorus, calcium and manganese during oil palm frond fermentation by Phanerochaete chrysosporium on ligninase enzyme activity. Biodiversitas 21: 1833-1838. The objective of this study was to evaluate the effects of supplementation with phosphorus (P) in combination with calcium (Ca) and manganese (Mn) during oil palm frond (OPF) fermentation by Phanerochaete chrysosporium on ligninase enzyme activity and lignin degradation. This study was carried out using a randomized complete design with 3 treatments (addition of P, Ca and Mn) and 5 replicates. The following treatments were performed: T1 (P 1000 + Ca 2000 + Mn 150 ppm), T2 (P 1500 + Ca 2000 + Mn 150 ppm), and T3  (P 2000 + Ca 2000 +Mn 150 ppm). The data were subjected to an analysis of variance (ANOVA), and differences between treatment means were tested using Duncan's multiple range test (DMRT). The parameters measured were as follows: lignin peroxidase (LiP) activity (U/mL), manganese peroxidase (MnP) activity (U/mL), crude protein (CP) content (%), crude fiber (CF) content (%) and the decrease in lignin (%). The results revealed a significant increase in LiP activity and CP content and a decrease in the lignin content (p<0.05) by the addition of P in the T3 treatment. However, the treatment nonsignificantly increased (p>0.05) MnP activity and significantly decreased (P<0.05) the CF content. In conclusion, supplementation of the OPF fermentation process with P 2000, Ca 2000, and Mn 150 ppm resulted in the highest ligninase enzyme activity and in decreased lignin content.

Pretreatment of lignocellulosic material with fungi capable of higher lignin degradation and lower carbohydrate degradation improves substrate acid hydrolysis and the eventual conversion to ethanol

2008 ◽  
Vol 54 (4) ◽  
pp. 305-313 ◽  
Author(s):  
Sarika Kuhar ◽  
Lavanya M. Nair ◽  
Ramesh Chander Kuhad
Keyword(s):  
Phanerochaete Chrysosporium ◽  
Lignin Degradation ◽  
Ethanol Yield ◽  
Fungal Isolate ◽  
Fermentation Inhibitors ◽  
Pycnoporus Cinnabarinus ◽  
Acid Hydrolysate ◽  
Carbohydrate Degradation ◽  
Fungal Pretreatment ◽  
Acid Load

Phanerochaete chrysosporium , Pycnoporus cinnabarinus ,and fungal isolates RCK-1 and RCK-3 were tested for their lignin degradation abilities when grown on wheat straw (WS) and Prosopis juliflora (PJ) under solid-state cultivation conditions. Fungal isolate RCK-1 degraded more lignin in WS (12.26% and 22.64%) and PJ (19.30% and 21.97%) and less holocellulose in WS (6.27% and 9.39%) and PJ (3.01% and 4.58%) after 10 and 20 days, respectively, than other fungi tested. Phanerochaete chrysosporium caused higher substrate mass loss and degraded more of holocellulosic content (WS: 55.67%; PJ: 48.89%) than lignin (WS: 18.89%; PJ: 20.20%) after 20 days. The fungal pretreatment of WS and PJ with a high-lignin-degrading and low-holocellulose-degrading fungus (fungal isolate RCK-1) for 10 days resulted in (i) reduction in acid load for hydrolysis of structural polysaccharides (from 3.5% to 2.5% in WS and from 4.5% to 2.5% in PJ), (ii) an increase in the release of fermentable sugars (from 30.27 to 40.82 g·L–1in WS and from 18.18 to 26.00 g·L–1in PJ), and (iii) a reduction in fermentation inhibitors (total phenolics) in acid hydrolysate of WS (from 1.31 to 0.63 g·L–1) and PJ (from 2.05 to 0.80 g·L–1). Ethanol yield and volumetric productivity from RCK-1-treated WS (0.48 g·g–1and 0.54 g·L–1·h–1, respectively) and PJ (0.46 g·g–1and 0.33 g·L–1·h–1, respectively) were higher than untreated WS (0.36 g·g–1and 0.30 g·L–1·h–1, respectively) and untreated PJ (0.42 g·g–1and 0.21 g·L–1·h–1, respectively).

scholarly journals Free hydroxyl radical is not involved in an important reaction of lignin degradation by Phanerochaete chrysosporium Burds

1985 ◽  
Vol 226 (2) ◽  
pp. 455-460 ◽  
Author(s):  
T K Kirk ◽  
M D Mozuch ◽  
M Tien
Keyword(s):  
Hydroxyl Radical ◽  
Phanerochaete Chrysosporium ◽  
Fenton Reaction ◽  
Lignin Degradation ◽  
Mechanism Of Formation ◽  
Mass Spectral ◽  
Free Hydroxyl ◽  
Lignin Model ◽  
Trapping Agent ◽  
Fenton System

Hydroxyl radical (HO.) has been implicated in the degradation of lignin by Phanerochaete chrysosporium. This study assessed the possible involvement of HO. in degradation of lignin substructural models by intact cultures and by an extracellular ligninase isolated from the cultures. Two non-phenolic lignin model compounds [aryl-C(alpha)HOH-C(beta)HR-C(gamma)H2OH, in which R = aryl (beta-1) or R = O-aryl (beta-O-4)] were degraded by cultures, by the purified ligninase, and by Fenton's reagent (H2O2 + Fe2+), which generates HO. The ligninase and the cultures formed similar products, derived via an initial cleavage between C(alpha) and C(beta) (known to be an important biodegradative reaction), indicating that the ligninase is responsible for model degradation in cultures. Products from the Fenton degradation were mainly polar phenolics that exhibited little similarity to those from the biological systems. Mass-spectral analysis, however, revealed traces of the same products in the Fenton reaction as seen in the biological reactions; even so, an 18O2-incorporation study showed that the mechanism of formation differed. E.s.r. spectroscopy with a spin-trapping agent readily detected HO. in the Fenton system, but indicated that no HO. is formed during ligninase catalysis. We conclude, therefore that HO. is not involved in fungal C(alpha)-C(beta) cleavage in the beta-1 and beta-O-4 models and, by extension, in the same reaction in lignin.

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