相关实验视频
Updated: Jul 16, 2025
08:43
Metagenomic Analysis of Silage
Published on: January 13, 2017
18.4K
综合的meta-omics方法揭示了Saccharopolyspora作为huangjiu发酵中的核心功能基因
Shuangping Liu1,2,3,4, Zhi-Feng Zhang2, Jieqi Mao5
1National Engineering Laboratory for Cereal Fermentation and Food Biomanufacturing, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.
NPJ biofilms and microbiomes
|September 19, 2023
概括
这项研究确定了Saccharopolyspora细菌是黄发酵小麦中关键的功能性微生物,揭示了它们在粉分解和风味发展中的作用. 这些细菌还可以减少发酵食品中的有害生物氨基胺.
科学领域:
- 食品微生物学 食品微生物学
- 发酵科学 发酵科学
- 转基因组学是指转基因组学.
背景情况:
- 了解核心微生物对于食品发酵过程至关重要.
- 小麦是黄 (酒精发酵) 的关键成分,但其核心微生物群尚不清楚.
- 传统观点往往强调阿斯伯吉勒斯,但这项研究调查了细菌的主导地位.
研究的目的:
- 为了确定黄发酵的小麦中占主导地位和功能性的微生物.
- 为了阐明这些微生物对黄质量的代谢贡献.
- 评估已识别的细菌在改善发酵食品安全性和特性方面的潜力.
主要方法:
- 小麦季度的转基因组和代谢组分析.
- 微生物的隔离和酶活性的表征.
- 与分离的菌株和Saccharomyces cerevisiae一起进行共发酵实验.
- 在接种疫苗之前和之后进行生物氨基含量分析.
主要成果:
- 发现白菌细菌,而不是Aspergillus,在小麦中占主导地位,并负责粉和纤维素的分解.
- 糖菌种对主要代谢物,包括酒精,,氨基酸和有机酸有显著的贡献.
- 在huangjiu,Saccharopolyspora hirsuta J2表现出高酶活性,并改善了发酵率,酒精含量和风味特征.
- S. hirsuta J2注射有效降低了黄,香肠和大豆中的生物氨基酸含量.
结论:
- 糖体 (Saccharopolyspora) 是小麦中一个关键的功能性基因,它驱动了重要的发酵过程,并为黄的独特特征做出了贡献.
- 萨卡罗波利斯波拉 hirsuta J2 显示出作为一种增强发酵食品的起始培养的显著潜力,特别是在改善风味和减少生物氨基胺方面.
- 这项研究重新定义了对黄发酵中的微生物生态的理解,并强调了Saccharopolyspora在食品工业中的更广泛用途.
更多相关视频
相关概念视频
01:23Microbial Fermentation
61
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
61
01:26Biosynthesis of Polysaccharides
37
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
37
01:27Microorganisms in Agriculture and Food industry
68
Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...
68
01:20Applications of Molecular Taxonomy
41
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
41
01:24Biosynthesis in Bacteria
39
Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
39
01:20Fates of Pyruvate
8.6K
Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
8.6K