中文摘要：

γ-氨基丁酸（GABA）具有降压、降血糖、抗癌等益生功能。玉米低聚肽（CP）作为一种生物活性肽一方面富含产GABA的发酵底物谷氨酸，另一方面可以通过抑制血管紧张素转移酶（ACE）起到降血压的作用。本研究利用酶解法制备玉米低聚肽，并以其为基质经植物乳杆菌NDC75017进行发酵，开发一种富含GABA的乳酸菌饮料。实验利用反向液相色谱法（Re—HPCC）检测发酵液中GABA的含量，利用酶解法制备玉米肽。并对玉米肽的脱苦工艺进行了初探，最后选用β-环糊精包埋苦味肽。得出GABA的产量最高为16mg／100mL，且饮料口感状态优良。产品在4℃贮藏21d后GABA维持在14mg／100mL以上，活菌数（对数值）维持在7．0mL^-1以上。

英文摘要：

Gamma-aminobutyric acid （GABA） has various physiological functions, such as hypotensive, hypoglycemic and anticancer activities. Corn oligopeptides （CP） as a bioactive peptides, can not only provide glutamic acid as the material to produce GABA, but also has,the ability to decrease blood pressure by inhibiting angiotensin I-converting enzyme （ACE）. This study selected CP as the basis to be fermented by LactobaciUus plantarum NDC75017, and develop a yogurt-like beverage with high nutritive value, which enriched GABA. The concentrations of GABA in the fermentation supematant was determined using reversed-phase high performance liquid chromatography （R.P-HPLC）, and hydrolyzed corn gluten meal to CP using alkali protease. Primary research about debittering of CP was also Carried out. Finally, we coated bitter peptides with β -cyclodextrin. The resuks showed the highest content of GABA was reached 16 mg/100 mL. The viable counts of L. plantarum NDC75017 was over 7.0 log CFU/mL after storage for 21 days at 4 ℃ ,with more than 14 mg/100 mL of GABA.