Volume 136, Issue 15 47339
Article

Enzymatic treatments as alternative to produce chitin fragments of low molecular weight from Alternaria alternata

Yaima Henry García

Yaima Henry García

Coordinación de Tecnología en Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera a La Victoria km 0.6, Col. Ejido La Victoria, C.P. 83304 Hermosillo, Sonora, México

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Rosalba Troncoso-Rojas

Corresponding Author

Rosalba Troncoso-Rojas

Coordinación de Tecnología en Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera a La Victoria km 0.6, Col. Ejido La Victoria, C.P. 83304 Hermosillo, Sonora, México

Correspondence to: R. Troncoso-Rojas (E-mail: [email protected])Search for more papers by this author
Martín Ernesto Tiznado-Hernández

Martín Ernesto Tiznado-Hernández

Coordinación de Tecnología en Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera a La Victoria km 0.6, Col. Ejido La Victoria, C.P. 83304 Hermosillo, Sonora, México

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María Elena Báez-Flores

María Elena Báez-Flores

Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Calle de las Américas y Josefa Ortiz de Domínguez, C.P. 80010 Culiacán, Sinaloa, México

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Elizabeth Carvajal-Millan

Elizabeth Carvajal-Millan

Coordinación de Tecnologíaen Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera a La Victoria km 0.6, Col. Ejido La Victoria, C.P. 83304 Hermosillo, Sonora, México

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Agustín Rascón-Chu

Agustín Rascón-Chu

Coordinación de Tecnología en Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera a La Victoria km 0.6, Col. Ejido La Victoria, C.P. 83304 Hermosillo, Sonora, México

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Jaime Lizardi-Mendoza

Jaime Lizardi-Mendoza

Coordinación de Tecnologíaen Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera a La Victoria km 0.6, Col. Ejido La Victoria, C.P. 83304 Hermosillo, Sonora, México

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Karla Guadalupe Martínez-Robinson

Karla Guadalupe Martínez-Robinson

Coordinación de Tecnologíaen Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera a La Victoria km 0.6, Col. Ejido La Victoria, C.P. 83304 Hermosillo, Sonora, México

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First published: 17 December 2018
Citations: 15

ABSTRACT

Chitin and its oligosaccharides are involved in the plant defense response against fungal pathogens. In most studies, these molecules come from crustacean shell, and there are scarce studies on the use of fungal chitin. Usually the extraction of chitin is by alkaline treatments, which affect the acetylation degree (DA), and the obtaining of oligosaccharides of low molecular weight; so the use of enzymes is proposed as an alternative treatment to obtain chitin oligosaccharides from fungi. The objective of this work was to characterize the chitin fragments of Alternaria alternata extracted by alkaline and enzymatic treatments. The chitin extracted was ultrasonicated and ultrafiltrated to produce chitin fragments. Enzymatic treatments decreased the protein content to 29%, and the bands corresponding to β-glucans decreased when β-1,3-glucanase was applied. Fragments smaller than 1 kDa, DA of 76.7%, and 35.4 μg glucosamine/mg dry weight were obtained by enzymatic treatments. The enzymatic treatments show promising results to extract chitin fragments from A. alternata without severely affect the DA of the molecule. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47339.

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