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Shelf-life enhancement of bio-inoculants through synergistic effects of encapsulation technology and osmotic protectants

文献类型： 外文期刊

作者： Hu, Mi 1 ; Hei, Ruo-nan 1 ; Guo, De-jie 1 ; Luo, Jia 1 ; Lu, Chao 1 ; Xu, Wen-long 1 ; Zhang, Zhi-yang 1 ; Xiao, Qing-bo 1 ; Ma, Yan 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Saline Alkali Soil Improvement & Utilizat, Nanjing, Peoples R China

关键词： Microbial encapsulation; Hydrogel; Osmotic protectant; Salt stress; Fertilizer

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.7； 五年影响因子：7.3 ）

ISSN： 2213-2929

年卷期： 2023 年 11 卷 5 期

页码：

收录情况： SCI

摘要： A novel protective capsule for encapsulating microorganism inoculants was developed based on a core/shell structured hydrogel doped with osmotic regulators, with the aim of protecting against salts stress. The resulting capsules showed favorable mechanical toughness, high encapsulated efficiency, low cell leakage and increased resistance against salt attack. Different types of sugar alcohol molecules were selected as the osmoprotectants and their effectiveness in retaining the microbial count of trichoderma harziana under adverse conditions was examined. It was found that by using trehalose-doped core/shell structured hydrogels as the microbial carrier, the survival rate and mycelial growth rate of trichoderma harziana increased during incubation in sodium chloride solution and on sodium chloride-containing solid medium. Furthermore, the shelf-life of the microor-ganisms demonstrated a significant increase from log 5.72 cfu/g to log 7.30 cfu/g after an incubation period of 180 days in compound fertilizers with 15 % nitrogen-phosphorus-potassium (NPK) content. This novel microbial encapsulated system showed remarkable preservation of microorganism inoculants under salt stress from fer-tilizer nutrients, suggesting a noticeable practical potential in agriculture.

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