Identification of antifungal compounds in konjac flying powder and assessment against wood decay fungi

Zhenju Bi; Fangxia Yang; Yafang Lei; Jeffrey J Morrell; Li Yan

doi:10.1016/j.indcrop.2019.111650

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Identification of antifungal compounds in konjac flying powder and assessment against wood decay fungi

Journal article

Peer reviewed

Identification of antifungal compounds in konjac flying powder and assessment against wood decay fungi

Zhenju Bi, Fangxia Yang, Yafang Lei, Jeffrey J Morrell and Li Yan

Industrial Crops and Products, Vol.140, 111650

2019

DOI: https://doi.org/10.1016/j.indcrop.2019.111650

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Abstract

extractives

konjac flying powder extracts

Amorphophallus konjac K. Koch

Gloeophyllum trabeum (Pers.: Fr.) Murr.

Trametes versicolor (L. ex Fr.) Quél.

Public concern for the environment has stimulated the development of natural wood preservatives. The antifungal activity of konjac (Amorphophallus konjac K. Koch) flying powder (a by-product produced during mechanical processing of konjac flour) ethanol extracts was evaluated against wood decay fungi in poplar (Populus nigra L.). Compounds associated with antifungal activity in the extracts were isolated and purified by silica gel column chromatography. The antifungal active fractions were identified by ultra-high-performance liquid chromatography-mass spectrometry (UHPLC-MS). The ethanol extracts showed better activity against the brown-rot fungus, Gloeophyllum trabeum (Pers.: Fr.) Murr. than the white-rot fungus, Trametes versicolor (L. ex Fr.) Quél. in poplar. The antifungal active fractions were mainly composed of organic acids and plant essential oils. Salicylic acid, 2,4,6-trichlorophenol, vanillin and cinnamaldehyde were present in the active fractions. These compounds showed high efficacy against both fungi in poplar. The results indicate that konjac extracts have potential as natural wood protectants and suggested that some fractions of konjak flying powder may be useful for protecting wood against fungal attack.

Details

Title: Identification of antifungal compounds in konjac flying powder and assessment against wood decay fungi
Authors: Zhenju Bi (Author) - Northwest A&F University, China
Fangxia Yang (Author) - Northwest A&F University, China
Yafang Lei (Author) - Northwest A&F University, China
Jeffrey J Morrell (Author) - University of the Sunshine Coast
Li Yan (Author) - Northwest A&F University, China
Publication details: Industrial Crops and Products, Vol.140, 111650
Publisher: Elsevier BV
Date published: 2019
DOI: 10.1016/j.indcrop.2019.111650
ISSN: 0926-6690
Organisation Unit: University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life; Forest Research Institute
Language: English
Record Identifier: 99450636302621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Agricultural Engineering; Agronomy