峨眉山野生金蝉花孢梗束培养试验

为确定峨眉山金蝉花孢梗束培养的最佳工艺条件,对金蝉花孢梗束生长的常用培养基配方进行筛选试验,选用大米、小米、黄豆等原料进行配方试验,采用均匀设计试验法优化培养基配方。结果表明,金蝉花在以无机盐为主要营养成分的Richard琼脂培养基和Czapek琼脂培养基上均能产生孢梗束。在大米等的配方试验中,以大米为营养物质的金蝉花孢梗束生长最快,金蝉花氨基酸含量为23.4%,粗多糖含量为26.5%,蛋白质含量为29.3%,均高于野生金蝉花中该物质的含量。在均匀设计的配方试验中,10号培养基中的金蝉花孢梗束以珊瑚状为主,菌体形态最好,孢梗束产率可达57.4%。10号配方孢梗束中蛋白质的含量高达42.5%,氨基酸含量高达33.3%,均远高于野生金蝉花。     

蝉棒束孢菌孢梗束培植过程中主要成分含量的变化规律及其复方对小鼠睡眠的影响

分析检测蝉棒束孢菌株BAI0101在培植过程中不同时间点孢梗束的转化率和孢梗束中多糖、虫草酸、腺苷和N ⁶-(2-羟乙基)腺苷含量的变化规律,对配伍的孢梗束复方辅助改善睡眠功能进行了初步评价。结果表明,从培植18d起,孢梗束的转化率呈现上升趋势,在培植30d左右,有保持稳定趋势;孢梗束中的多糖、虫草酸和腺苷含量均随着培植时间的延长呈现增高趋势,均在22-24d达到最高值,其后开始呈现降低趋势,而孢梗束中的N ⁶-(2-羟乙基)腺苷含量随着培植时间的延长呈现降低趋势,在24-26d左右达到最低值,其后呈现上升趋势,在培植至36d左右达到含量的最高值并保持稳定;对利用该菌株培植的孢梗束,经中药配伍组成的保健品小复方进行了辅助改善睡眠保健功能的初步评价,结果表明该复方有明显促进阈下剂量戊巴比妥钠诱导的小鼠睡眠作用,能明显降低巴比妥钠诱导小鼠睡眠潜伏期,且无直接睡眠作用,不影响戊巴比妥致小鼠睡眠时间,根据《保健食品检验与评价技术规范》,判定该复方具有辅助改善睡眠的保健功能。     

Morphogenesis and free amino acid composition of the ascomycete Sphaerostilbe repens as influenced by nitrogen and calcium

Abstract Sphaerostilbe repens utilizes nitrate and ammonium as nitrogen sources. Differentiation of mycelium into rhizomorphs and coremia was reduced in the presence of nitrate and completely inhibited in the absence of calcium. The most abundant free amino acids were, in decreasing order: alanine, glutamine, glutatomic acid, serine, aspartic acid, γ-aminobutyric acid, arginine and threonine. These compounds represented 90% of the total amino acid pool.
The free amino acid composition did not vary with cultural conditions although concentrations of individual amino acids differed. In ammonium-grown cells, γ-aminobutyric acid increased in concentration and glutamate, aspartate and alanine decreased. Calcium-deficient media reduced amino acid concentrations, especially of arginine and ornithine. Amino acid contents increased during the growth period and were higher in rhizomorphs than in vegetative mycelia.