碳、氮营养对2株茶菌核心菌株生长和产酸的影响

Effects of Carbon and Nitrogen Nutrition on the Growth and Acid Production of Two Core Strains of Tea Fungus

本文探究碳、氮源物质对茶菌两个核心菌株生长和总酸产量的影响,通过设计不同碳、氮源营养的培养基,研究碳、氮营养对布鲁塞尔酒香酵母Q3和葡萄糖醋杆菌Q4生长和产酸的影响。结果表明,与其他碳源相比较,乳糖和半乳糖对菌株Q3生长促进作用弱;除乳糖外,其他供试糖类对菌株Q3的产酸促进作用较强。与其他氮源相比,铵态氮有利于菌株Q3的生长和产酸。与菌株Q3相比,菌株Q4对不同碳、氮源物质的选择更加严格;以葡萄糖为碳源、茶氨酸为氮源时可明显促进菌株Q4的生长和产酸。

In this paper,the effects of carbon and nitrogen sources on the growth and total acid production of the two core strains of tea bacteria were studied,and the effects of carbon and nitrogen nutrients on the growth and acid production of Brettanomyces bruxellensis Q3 and Komagataeibacter rhaeticus Q4 were studied by designing media with different carbon and nitrogen sources.The results showed that lactose and galactose promoted the growth of strain Q3 weakly compared with other carbon sources.Except for lactose,the other sugars for testing promoted acid production of strain Q3 strongly.Compared with other nitrogen sources,ammonium nitrogen favoured the growth and acid production of strain Q3.Compared with strain Q3,strain Q4 had a stricter selection of different carbon and nitrogen sources;glucose as the carbon source and theanine as the nitrogen source could obviously promote the growth and acid production of strain Q4.