Production of antifungal iturins from vegetable straw: A combined chemical-bacterial process

文献类型： 外文期刊

第一作者： Yuan, Yuan

作者： Yuan, Yuan;Chu, Depeng;Cui, Zhenzhen;Zhang, Han;You, Xiangwei;Li, Yiqiang;Fan, Jiajun;Cui, Zhenzhen;Wang, Xiaoqiang;Wang, Rui

作者机构：

关键词： Pepper straw; Iturin; Hydrolysis; Fermentation; B; amyloliquefaciens

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）

ISSN： 0960-8524

年卷期： 2023 年 378 卷

页码：

收录情况： SCI

摘要： A combined chemical-bacterial process was developed to convert vegetable straw waste to high value antifungal iturins. Straws from three widely cultivated vegetable (cucumber, tomato and pepper) were evaluated as feedstocks for iturin production. Microwave assisted hydrolysis with very dilute acid (0.2% w/w H2SO4) achieved efficient reducing sugar recovery. The high glucose concentration in non-detoxified hydrolysate from pepper straw facilitated the optimal growth of Bacillus amyloliquefaciens strain Cas02 and stimulated the production of iturin. The fermentation parameters were optimised to enhance the iturin production efficiency. The obtained fermentation extract was further purified using macroporous adsorption resin, resulting in an iturin-rich extract that exhibited strong antifungal activity against Alternaria alternata with an IC50 of 176.44 mu g/mL. Each iturin homologue was identified using NMR. Overall, 1.58 g iturin-rich extract containing 164.06 mg/g iturins was obtained from 100 g pepper straw, illustrating the great potential of valorising pepper straw via this process.

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