An efficient preparation process of sisal fibers via the specialized retting microorganisms: Based on the ideal combination of degumming-related enzymes for the effective removal of non-cellulosic macromolecules

Bioaugmentation retting with the specialized pectinolytic and xylanolytic microorganisms can accelerate the removal of non-cellulosic macromolecules around plant fibers, thus shortening retting time and facilitating fiber quality. Currently, few specialized microorganisms have been explored for the...

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Bibliographic Details
Published in:International journal of biological macromolecules 2024-08, Vol.274 (Pt 2), p.133416, Article 133416
Main Authors: Huang, Linru, Peng, Jieying, Tan, Minghui, Fang, Jianhao, Li, Kuntai
Format: Article
Language:English
Subjects:
Cellulose - chemistry
Cellulose - metabolism
Degumming
Fungi
Hydrolysis
Macromolecular Substances - chemistry
Macromolecular Substances - metabolism
Penicillium - enzymology
Polygalacturonase - metabolism
Retting microorganisms
Sasa - chemistry
Sasa - microbiology
Sisal fiber
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Summary:Bioaugmentation retting with the specialized pectinolytic and xylanolytic microorganisms can accelerate the removal of non-cellulosic macromolecules around plant fibers, thus shortening retting time and facilitating fiber quality. Currently, few specialized microorganisms have been explored for the retting of sisal fibers. The present study excavated the retting fungi including Aspergillus micronesiensis HD 3–6, Penicillium citrinum HD 3–12-3, and Cladosporium sp. HD 4–13 from the region-specific soil samples of planting sisal, and investigated their bioaugmentation retting effects on raw sisal leaves. Results showed that combination of the three fungi achieved the most excellent degumming efficiency (13.69 % of residual gum in sisal fibers) and the highest fiber yield (4.47 %). Furthermore, this fungi combination had the ideal enzymatic hydrolysis features with high activities of pectinase, xylanase and mannanase whereas a low activity of cellulase during the whole retting process, thus endowing the prepared sisal fibers with the lowest mass percentage of non-cellulosic macromolecules (9.76 wt%) and the highest cellulose content (89.23 wt%). SEM and FT-IR analysis further verified that the non-cellulosic substances around sisal fibers were efficiently removed. In summary, the consortia of the three fungi achieved ideal degumming-related enzymes for the removal of non-cellulosic macromolecules, thus acquiring the efficient preparation of sisal fibers. [Display omitted] •Three specialized fungi were excavated for bioaugmentation retting on sisal leaves.•The excavated fungi exhibited the ideal combination of degumming-related enzymes.•An efficient bioaugmentation retting strategy was developed by using consortia of the three fungi.•The prepared sisal fibers displayed a desired mechanical property and whiteness.
ISSN:0141-8130
1879-0003
1879-0003
DOI:10.1016/j.ijbiomac.2024.133416