Adding value to lignocellulosic wastes via their use for endoxylanase production by <i>Aspergillus</i> fungi

Díaz, Gabriela Verónica; Coniglio, Romina Olga; Velázquez, Juan Ernesto; Zapata, Pedro Darío; Villalba, Laura Lidia; Fonseca, María Isabel

doi:10.1080/00275514.2018.1556557

Cited by 15 publications

(4 citation statements)

References 19 publications

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“…The highest titers of endoglucanase were recorded for wheat bran (3.24 U/g) and 1.36 U/g by groundnut fodder and 1.09 U/g by rice bran [27]. There are reports on xylanase activity of A. niger using sugarcane bagasse (110 U ml −1 ) and cassava bagasse (more than 160 U ml −1 ) [28]. It is arduous to compare the cellulolytic activities reported with other substrates as the authors demonstrated the activity in different units.…”

Section: Resultsmentioning

confidence: 99%

Albizia lebbeck fruit pods as a substrate for the production of lignocellulolytic enzymes by Aspergillus niger

2020

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Aspergillus niger isolated from the soil was investigated for its capability to produce various lignocellulolytic enzymes, such as LiP, endoglucanase, FPase, xylanase by solid-state fermentation, using Albizia lebbeck fruit pods as a substrate. The chemical composition of the fruit pods was studied, and the production pattern of the enzymes was examined by growing the fungi for 25 days. The LiP activity was low, whereas a good production of endoglucanase, FPase, and xylanase enzymes was noted. A dye decolorization capacity of the A. niger was also studied with Congo red. Therefore, A. lebbeck fruit pods which are considered as waste and burnt off can be utilized for the production of holocellulolytic enzymes using A. niger.Many lignocellulosic materials such as sugarcane bagasse, corn stover, bran, rice straw, and wheat straw have been studied as

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Section: Resultsmentioning

confidence: 99%

Albizia lebbeck fruit pods as a substrate for the production of lignocellulolytic enzymes by Aspergillus niger

2020

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“…PMEs remove the methoxy esters (Christgau et al 1996;Sella et al 2016) while celullases are involved in cellulose hydrolysis (Castrillo et al 2015). In previous studies, A. niger LBM055, showed high endoxylanase levels when they were grown with sugarcane and cassava bagasses as carbon sources (Díaz et al 2019). PMEs and cellulases catalyze the decomposition of pectin and lignocellulose materials, for the generation of monomeric sugars; therefore, it is feasible to assume that fungal growth inhibition could be reduced by supplementing the culture media with carbon sources.…”

Section: Discussionmentioning

confidence: 99%

Bioproduction of α‐terpineol and R‐(+)‐limonene derivatives by terpene‐tolerant ascomycete fungus as a potential contribution to the citrus value chain

Velázquez

Sadañoski

Zapata

et al. 2020

J. Appl. Microbiol.

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Aims: The aims of this article were to select fungal species with high tolerance and high growth rate in mediums supplemented with limonene and citrus essential oils (CEOs), and to test the bioconversion capability of the chosen isolates for the bioproduction of aroma compounds. Methods and Results: Based on the use of predictive mycology, 21 of 29 isolates were selected after assaying R-(+)-limonene and CEO tolerance (10 g l −1). With a dendrogram divisive coefficient of 0Á937, the subcluster two with isolates Aspergillus niger LBM 055, Penicillium sp. LBM 150, Penicillium sp. LBM 151 and Penicillium sp. LBM 154 gathered the highest tolerance and mycelia growth speed. Ultrastructural analysis indicated that culture media containing limonene had no visible toxic activity that could promote morphological changes in the fungal cell wall. The biomass of A. niger LBM055 was distinctive in liquid media supplemented with R-(+)-limonene (0Á57 AE 0Á07 g) and it was selected to prove bioconversion capacity, under static and agitated conditions, and converted up to 98% of limonene, yielding a wide variety of products that were quantified by GC-FID. It was obtained at molecular weights less than limonene (64-100%), between limonene and αterpineol (12-72%) and greater than α-terpineol (2-48%). Conclusions: Aspergillus niger LBM 055, Penicillium sp. LBM 150, Penicillium sp. LBM 151 and Penicillium sp. LBM 154 showed to the highest tolerance and growth rate in mediums supplemented with R-(+)-limonene and orange and lemon essential oils. Particularly, A. niger LBM055, showed limonene bioconversion capability and produced different molecular weights compounds such us α-terpineol. Significance and Impact of the Study: Different bioproducts can be obtained by changing operative condition with the same fungus, and this bioprocess aspect is a significant approach to be adopted on industrial scale leading to the creation of new natural flavours and fragrance compositions.

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“…Aspergillus sp. LBM 134 was grown according to Díaz et al (2019b). After incubation, the culture media were centrifuged at 4°C (15 min, 10,000 g) and supernatants were used to determine CMCase, BGL, CBH and Filter Paper activity (FPase).…”

Section: Quantitative Determination Of Aspergillus Sp Lbm 134 Cellulmentioning

confidence: 99%

Aspergillus niger LBM 134 isolated from rotten wood and its potential cellulolytic ability

et al. 2020

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Aspergillus: is a genus of filamentous and cosmopolitan fungi that includes important species for medical mycology, food, basic research and agro-industry areas. Aspergillus section Nigri are efficient producers of hydrolytic enzymes such as cellulases that are employed in the cellulose conversion. Hence, the search of new cellulolytic isolates and their correct identification is important for carrying out safe biotechnological processes. This study aimed to characterise the cellulolytic potential of Aspergillus sp. LBM 134, isolated from the Paranaense rainforest (Argentina) and to identify the isolate through a polyphasic approach. The fungus was identified as Aspergillus niger and its cellulolytic potential was evaluated by using Congo red technique and fluorescence plate assays for carboxymethyl cellulase, β-glucosidase and cellobiohydrolase, respectively. All three cellulase activities were positive; this bio-prospective positioned A. niger LBM 134 as a promising alternative for industries that require organisms capable of carrying out cellulosic biomass processing.

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Adding value to lignocellulosic wastes via their use for endoxylanase production by Aspergillus fungi

Cited by 15 publications

References 19 publications

Albizia lebbeck fruit pods as a substrate for the production of lignocellulolytic enzymes by Aspergillus niger

Albizia lebbeck fruit pods as a substrate for the production of lignocellulolytic enzymes by Aspergillus niger

Bioproduction of α‐terpineol and R‐(+)‐limonene derivatives by terpene‐tolerant ascomycete fungus as a potential contribution to the citrus value chain

Aspergillus niger LBM 134 isolated from rotten wood and its potential cellulolytic ability

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