The chemical composition and antifungal activity of cork from Quercus variabilis

IF 3.1 2区农林科学 Q1 FORESTRY

Wood Science and Technology Pub Date : 2024-08-09 DOI:10.1007/s00226-024-01592-9

Kangren Niu, Ying Li, Keyu Sun, Xuechun Feng, Li Zhang, Xiaozhou Song

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Abstract

In this study we separated the chemical components of cork from Quercus variabilis by various solvent extraction and alcoholysis methods. We identified the content and chemical composition of suberin and dichloromethane extract with gas chromatography-mass spectrometry (GC-MS) and analyzed the antifungal effects of different cork extracts against wood-decaying fungi. The results showed that the main structural component of cork, suberin, averaging 36.34% of the total dry weight, exhibited a pronounced inhibitory effect on wood-decaying fungi, compared to the dichloromethane extract. By the end of the entire culture period, the colony diameter of white rot fungi was 5 mm in the 40 mg/mL suberin treatment group, 19 mm for brown rot fungi, both significantly smaller than the control group (90 mm). Hydroxy fatty acids, free fatty acids, and α,ω-diacids may be the key components contributing to the antifungal activity of suberin. The inhibitory mechanism of suberin components on wood-decaying fungi may involve suppressing the respiratory metabolism of the fungi and increasing the permeability of their cell membranes, thereby limiting their normal life activities.

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柞树软木塞的化学成分和抗真菌活性

在这项研究中，我们通过各种溶剂萃取和醇解方法分离了变种柞木软木塞的化学成分。我们用气相色谱-质谱法（GC-MS）鉴定了软木脂和二氯甲烷提取物的含量和化学成分，并分析了不同软木提取物对木材腐朽真菌的抗真菌作用。结果表明，与二氯甲烷提取物相比，软木塞的主要结构成分--单宁（平均占总干重的 36.34%）对木材腐朽真菌有明显的抑制作用。在整个培养期结束时，40 毫克/毫升羊胎素处理组的白腐真菌菌落直径为 5 毫米，褐腐真菌菌落直径为 19 毫米，均明显小于对照组（90 毫米）。羟基脂肪酸、游离脂肪酸和α,ω-二元酸可能是山羊毛脂抗真菌活性的关键成分。木脂成分对木材腐朽真菌的抑制机制可能包括抑制真菌的呼吸代谢，增加其细胞膜的通透性，从而限制其正常的生命活动。

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来源期刊

Wood Science and Technology 工程技术-材料科学：纸与木材

CiteScore

5.90

自引率

5.90%

发文量

审稿时长

3 months

期刊介绍： Wood Science and Technology publishes original scientific research results and review papers covering the entire field of wood material science, wood components and wood based products. Subjects are wood biology and wood quality, wood physics and physical technologies, wood chemistry and chemical technologies. Latest advances in areas such as cell wall and wood formation; structural and chemical composition of wood and wood composites and their property relations; physical, mechanical and chemical characterization and relevant methodological developments, and microbiological degradation of wood and wood based products are reported. Topics related to wood technology include machining, gluing, and finishing, composite technology, wood modification, wood mechanics, creep and rheology, and the conversion of wood into pulp and biorefinery products.