The xylanolytic enzyme system from the genus Penicillium

Chávez, Renato; Bull, Paulina; Eyzaguirre, Jaime

doi:10.1016/j.jbiotec.2005.12.036

Cited by 162 publications

(92 citation statements)

References 103 publications

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“…The hemicellulolytic fungal populations identified also represent diverse taxa from three fungal phyla ( Figure 5). These populations include members of Mortierella and Cryptococcus, genera previously known to be involved in hemicellulose degradation (Biely et al, 1978;Morosoli et al, 1993;Chávez et al, 2006;Varnait . e and Raudonien .…”

Section: Harvesting Impacts On Hemicellulolytic Microbes Htc Leung Et Almentioning

confidence: 99%

Long-term effects of timber harvesting on hemicellulolytic microbial populations in coniferous forest soils

et al. 2015

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Forest ecosystems need to be sustainably managed, as they are major reservoirs of biodiversity, provide important economic resources and modulate global climate. We have a poor knowledge of populations responsible for key biomass degradation processes in forest soils and the effects of forest harvesting on these populations. Here, we investigated the effects of three timber-harvesting methods, varying in the degree of organic matter removal, on putatively hemicellulolytic bacterial and fungal populations 10 or more years after harvesting and replanting. We used stable-isotope probing to identify populations that incorporated 13C from labeled hemicellulose, analyzing 13C-enriched phospholipid fatty acids, bacterial 16 S rRNA genes and fungal ITS regions. In soil microcosms, we identified 104 bacterial and 52 fungal hemicellulolytic operational taxonomic units (OTUs). Several of these OTUs are affiliated with taxa not previously reported to degrade hemicellulose, including the bacterial genera Methylibium, Pelomonas and Rhodoferax, and the fungal genera Cladosporium, Pseudeurotiaceae, Capronia, Xenopolyscytalum and Venturia. The effect of harvesting on hemicellulolytic populations was evaluated based on in situ bacterial and fungal OTUs. Harvesting treatments had significant but modest long-term effects on relative abundances of hemicellulolytic populations, which differed in strength between two ecozones and between soil layers. For soils incubated in microcosms, prior harvesting treatments did not affect the rate of incorporation of hemicellulose carbon into microbial biomass. In six ecozones across North America, distributions of the bacterial hemicellulolytic OTUs were similar, whereas distributions of fungal ones differed. Our work demonstrates that diverse taxa in soil are hemicellulolytic, many of which are differentially affected by the impact of harvesting on environmental conditions. However, the hemicellulolytic capacity of soil communities appears resilient.

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Section: Harvesting Impacts On Hemicellulolytic Microbes Htc Leung Et Almentioning

confidence: 99%

Long-term effects of timber harvesting on hemicellulolytic microbial populations in coniferous forest soils

et al. 2015

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“…The characterization of the secretome is very complex, the composition and size of it will depend on the conditions of growth and the tools employed. Carbon source is able to modify the size of a secretome, for example glucose exerts a strong repression over the hemicellulases of Aspergilli, Thrichoderma and Penicillia (Chavez, Bull, and Eyzaguirre 2006).…”

Section: The Fungal Secretomementioning

confidence: 99%

The Use of Mass Spectrometry for Characterization of Fungal Secretomes

Callegari¹,

Navarrete²

2012

Tandem Mass Spectrometry - Applications and Principles

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“…As in the case of cellulases, microbial production of xylanases can take place in SmF and SSF (see Table 3), although about 80-90% of the commercial xylanases are gained through submerged fermen- Enzyme Production 481 tation, usually with filamentous ascomycetes and their related anamorphic genera , Chávez et al 2006; Table 3). Species are often the same than those used in cellulase production (compare examples in Tables 2 and 3).…”

Section: Xylanasesmentioning

confidence: 99%

“…Species are often the same than those used in cellulase production (compare examples in Tables 2 and 3). Fungi tend to produce mixtures of xylan-degrading enzymes, different xylanases combined with accessory xylanolytic enzymes for debranching of substituted xylans (Haltrich et al 1996, Chávez et al 2006 that without further downstream processing might directly be applied in biobleaching of paper pulp (Szendefy et al 2006). Important for this is that the enzymes are as much as possible cellulase-free (Christov et al 1999).…”

Section: Xylanasesmentioning

confidence: 99%

Wood production, wood technology, and biotechnological impacts

Kües¹

2007

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The xylanolytic enzyme system from the genus Penicillium

Cited by 162 publications

References 103 publications

Long-term effects of timber harvesting on hemicellulolytic microbial populations in coniferous forest soils

Long-term effects of timber harvesting on hemicellulolytic microbial populations in coniferous forest soils

The Use of Mass Spectrometry for Characterization of Fungal Secretomes

Wood production, wood technology, and biotechnological impacts

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