论文摘要
三叶半夏(Pinellia ternata (Thunb.)Breit.)为天南星科半夏属植物,用药史已有2000多年,是我国最常用的传统中药材之一。本论文通过人为划分生长时期和对组织培养过程的优化,对操作流程进行了规范化和标准化研究。并针对传统组织培养耗费大量人力物力的缺点,设计组装了间歇浸没培养反应器,并对三叶半夏进行了初步的培养实验,期望为三叶半夏的大规模自动化生产提供一条新的途径。1.组培标准体系的建立:三叶半夏组培操作标准流程如下:叶柄经75%酒精处理20 s,升汞处理8 min,接种入Ms+6-BA1.0 mg/L+NAA0.05 mg/L+蔗糖3%+琼脂5.0 g/L的培养基诱导愈伤及丛生芽,待其生长至“叶柄伸长期”时切割为单个芽转接至Ms+6-BA1.0 mg/L+NAA0.02 mg/L+蔗糖3%+琼脂5.0g/L的培养基中进行增殖。于栽种季节,取“叶片成熟期”丛生芽接种至1/2Ms+IBA0.03 mg/L+NAA0.01 mg/L+蔗糖3%+琼脂5.0 g/L+AC 0.3 g/L的培养基中诱导生根,30 d后炼苗移栽。如不宜栽种,将“叶片增殖期”的丛生芽接种至1/2Ms+IBA0.03 mg/L+NAA0.01 mg/L+蔗糖5%+琼脂5.0 g/L+AC 0.3 g/L培养基,生根苗在瓶内倒苗得到离体块茎。离体块茎可在瓶内长期储存,栽种时将其洗净,即可播种。2.间歇浸没培养反应器设计组装及培养半夏的研究:设计了一种间歇浸没培养反应器,并进行组装,试运行稳定。随后利用反应器对半夏扩繁进行了研究。一方面通过对生物量、增殖系数、组培苗状态、保卫细胞和叶绿体个数等各方面对比,研究了不同外植体在反应器内的生长情况。实验得到以丛生芽和叶柄为外植体时每个反应器产生的组培苗数目分别为1957棵和1382棵,增殖系数达到39.15和27.65。且以叶柄为外植体得到的组培苗较为健壮,为适合反应器的外植体类型。另一方面以叶柄为外植体,对反应器间歇浸没培养和传统固体培养以及液体摇瓶培养的组培苗进行了对比。间歇浸没反应器的增殖系数为24.73,固体培养为14.75,液体摇瓶培养为12.26;组培苗形态方面固体培养得到的苗最为健壮;叶绿体个数方面固体培养及反应器培养无差别,优于液体摇瓶培养。由此可见相对于传统的固体培养,反应器培养半夏具有增殖系数高,只需一次接种,并且培养基更换方便,自动化程度高的优点。因此间歇浸没培养反应器完全可用于三叶半夏组培苗的生产。
论文目录
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标签:三叶半夏论文; 组织培养论文; 标准化体系论文; 间歇浸没培养反应器论文;