摘要
通过单因素试验、Plackett-Burman(PB)试验和响应面优化获得产酸性α-淀粉酶黑曲霉孢子原生质体制备和再生的最佳工艺参数:黑曲霉种龄72 h、孢子浓度7.5×106CFU/mL、渗透压稳定剂甘露醇浓度0.85 mol/L,以10 g/L蜗牛酶+10 g/L纤维素酶+10 g/L溶菌酶为破壁酶、pH 6.8、酶解温度37℃、酶解2 h。在此条件下,原生质体制备率可达86.92%,再生率可达42.67%。
The optimum conditions for formation and regeneration of protoplasts from Asperigillus niger with a high yield of acidstable α-amylase were obtained using one-factor-at-a-time experiments, Plackett-Burman design and response surface methodologyas follows: seed age of 72 h, spore concentration of 7.5 × 106CFU/mL, stabilization of the osmotic pressure using 0.85 mol/Lmannitol, and hydrolysis of cell walls with a mixture of snailase (10 g/L), cellulose (10 g/L) and lysozyme (10 g/L) at 37 ℃, pH 6.8for 2 h. Under these conditions, the rates of protoplast formation and regeneration reached 86.92% and 42.67%, respectively.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2014年第1期155-158,共4页
Food Science
基金
"十二五"国家科技支撑计划项目(2012BAD31B08)
国家自然科学基金项目(31201427
31101214)
湖南省自然科学基金项目(12JJ6028)
湖南省科技计划项目(2012NK3061)
长沙市科技局重点项目(K1201140-21)
关键词
原生质体
酸性Α-淀粉酶
黑曲霉
响应面法
制备
再生
protoplast
acid-stable α-amylase
Aspergilli niger
response surface methodology
formation
regeneration