Cellulase activities during decomposition of a submerged aquatic macrophyte (Utricularia breviscapa): a microcosm assay

Bianchini, Irineu

doi:10.1590/s1517-83822007000200008

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…Cunha-Santino and Bianchini Jr. (11) measured cellulolytic activities from U. breviscapa detritus and found a higher activity of integral detritus at 15°C, showing that temperature affects cellulase activity.…”

Section: Discussionmentioning

confidence: 99%

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Xylanase and cellulase activities during anaerobic decomposition of three aquatic acrophytes

Nunes¹,

Bianchini²

2011

Braz. J. Microbiol.

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Enzymatic activity during decomposition is extremely important to hydrolyze molecules that are assimilated by microorganisms. During aquatic macrophytes decomposition, enzymes act mainly in the breakdown of lignocellulolytic matrix fibers (i.e. cellulose, hemicellulose and lignin) that encompass the refractory fraction from organic matter. Considering the importance of enzymatic activities role in decomposition processes, this study aimed to describe the temporal changes of xylanase and cellulose activities during anaerobic decomposition of Ricciocarpus natans (freely-floating), Oxycaryum cubense (emergent) and Cabomba furcata (submersed). The aquatic macrophytes were collected in Óleo Lagoon, Luiz Antonio, São Paulo, Brazil and bioassays were accomplished. Decomposition chambers from each species (n = 10) were set up with dried macrophyte fragments and filtered Óleo Lagoon water. The chambers were incubated at 22.5°C, in the dark and under anaerobic conditions. Enzymatic activities and remaining organic matter were measured periodically during 90 days. The temporal variation of enzymes showed that C. furcata presented the highest decay and the highest maximum enzyme production. Xylanase production was higher than cellulase production for the decomposition of the three aquatic macrophytes species.

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Section: Discussionmentioning

confidence: 99%

“…These compounds are hydrolyzed by cellulases and xylanases from microbial extracellular enzymes (43). Some biotic factors can hinder this process, as microbiota metabolic activity, biomass and diversity (11). …”

Section: Introductionmentioning

confidence: 99%

Xylanase and cellulase activities during anaerobic decomposition of three aquatic acrophytes

Nunes¹,

Bianchini²

2011

Braz. J. Microbiol.

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“…Enormous amounts of agricultural, industrial and municipal cellulosic wastes have been accumulating or used inefficiently due to the high cost of their utilization processes (7, 21, 24). In Egypt, more than 30 million tons of agricultural wastes are annually produced (42).…”

Section: Introductionmentioning

confidence: 99%

Physiological studies on carboxymethyl cellulase formation by Aspergillus terreus DSM 826

Abdel‐Fatah¹,

Hassan²,

Elshafei³

et al. 2012

Braz. J. Microbiol.

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Physiological studies were conducted to determine the optimum cultural conditions for maximal carboxymethyl cellulase (CMCase) formation by Aspergillus terreus DSM 826. Shaking condition at 150 rpm is favorable for the production of CMCase from rice straw and sugar cane bagasse. The highest enzyme yield was obtained at the third day of incubation at 30 °C for both cases; however CMCase formation occurred at a broad range of pH values, with maximal formation of A. terreus DSM 826 CMCase at pH 4.5 and 5.0 when rice straw and sugar cane bagasse were used as sole carbon source, respectively. Carboxymethyl cellulose (CMC) was found to be a good inducer for CMCase formation in both agricultural wastes with CMC concentrations of 0.5 and 1.0 % (w/v) in case of rice straw and sugar cane bagasse, respectively. High level of enzyme formation was obtained with the addition of ammonium chloride as nitrogen source in both cases and at a concentration of 0.4 % (v/v Tween-80) as an addition to medium containing rice straw. However this addition did not influence the production of CMCase in case of using sugar cane bagasse as carbon source.

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Tropical macrophyte degradation dynamics in freshwater sediments: relationship to greenhouse gas production

Bianchini

2013

J Soils Sediments

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Cellulase activities during decomposition of a submerged aquatic macrophyte (Utricularia breviscapa): a microcosm assay

Cited by 5 publications

References 39 publications

Xylanase and cellulase activities during anaerobic decomposition of three aquatic acrophytes

Xylanase and cellulase activities during anaerobic decomposition of three aquatic acrophytes

Physiological studies on carboxymethyl cellulase formation by Aspergillus terreus DSM 826

Tropical macrophyte degradation dynamics in freshwater sediments: relationship to greenhouse gas production

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