Cellulase production under solid-state fermentation by Aspergillus sp. IN5: Parameter optimization and application

Boondaeng, Antika; Keabpimai, Jureeporn; Trakunjae, Chanaporn; Vaithanomsat, Pilanee; Srichola, Preeyanuch; Niyomvong, Nanthavut

doi:10.1016/j.heliyon.2024.e26601

Cited by 4 publications

(1 citation statement)

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“…NaOH’s strong alkaline properties effectively destroy lignin and hemicellulose structures, resulting in a considerable fall in cellulose content. Boodaeng et al 39 found that pretreatment of rice straw with diluted alkali resulted in higher reducing sugar yields than acid treatment. FTIR spectroscopy revealed considerable structural changes in rice straw throughout pretreatment and SSF by fungi, showing the degradation of lignin, cellulose, and hemicellulose.…”

Section: Discussionmentioning

confidence: 99%

Enhancing soil amendment for salt stress using pretreated rice straw and cellulolytic fungi

Ma,

Mongkolthanaruk,

Riddech

2024

Sci Rep

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Rice straw breakdown is sluggish, which makes agricultural waste management difficult, however pretreatment procedures and cellulolytic fungi can address this issue. Through ITS sequencing, Chaetomium globosum C1, Aspergillus sp. F2, and Ascomycota sp. SM2 were identified from diverse sources. Ascomycota sp. SM2 exhibited the highest carboxymethyl cellulase (CMCase) activity (0.86 IU/mL) and filter-paper cellulase (FPase) activity (1.054 FPU/mL), while Aspergillus sp. F2 showed the highest CMCase activity (0.185 IU/mL) after various pretreatments of rice straw. These fungi thrived across a wide pH range, with Ascomycota sp. SM2 from pH 4 to 9, Aspergillus sp. F2, and Chaetomium globosum C1 thriving in alkaline conditions (pH 9). FTIR spectroscopy revealed significant structural changes in rice straw after enzymatic hydrolysis and solid-state fermentation, indicating lignin, cellulose, and hemicellulose degradation. Soil amendments with pretreated rice straw, cow manure, biochar, and these fungi increased root growth and soil nutrient availability, even under severe salt stress (up to 9.3 dS/m). The study emphasizes the need for a better understanding of Ascomycota sp. degradation capabilities and proposes that using cellulolytic fungus and pretreatment rice straw into soil amendments could mitigate salt-related difficulties and improve nutrient availability in salty soils.

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Section: Discussionmentioning

confidence: 99%