摘要:为了研究GASBD基因是否可应用于SBD-平台技术,GASBD蛋白在马铃薯块茎中的表达对转基因马铃薯淀粉的合成及理化性质是否有影响进行研究。通过western斑点杂交技术检测GASBD重组蛋白的积累量,结果显示大部分转GASBD基因株系淀粉中能检测到GASBD重组蛋白的积累。对表观直链淀粉和淀粉的含量进行测定,结果显示GASBD蛋白在淀粉颗粒中的积累对转基因马铃薯的表观直链淀粉含量没有影响或影响很小。对淀粉糊化性质和热力学性质进行测定,结果表明GASBD蛋白在淀粉中的积累对淀粉糊化特性的峰值粘度和回生值以及热力学性质的焓变和起始温度都没有影响或影响很小。上述结果表明,GASBD可以用于对淀粉的组成和结构进行修饰的SBD-平台技术。67939
毕业论文关键词:GASBD基因;斑点杂交;糊化性质;热力学性质;SBD-平台技术
Abstract:In order to determine whether GASBD gene can be used for SBD- platform technology, the effect of the expression of GASBD protein in potato tubers on the starch synthesis and physicochemical properties of transgenic potato were studied. The accumulation of GASBD recombinant protein was measured by Western dot blot hybridization, and the results showed that the accumulation of GASBD recombinant protein could be detected in the most transgenic GASBD lines. Apparent amylose contents and starch content were measured. The results showed that the accumulation of GASBD in starch granules has no significant effect on the apparent amylose contents of transgenic potato. The starch pasting properties and thermodynamic properties were measured. The results showed that the accumulation of GASBD protein in starch has no significant effect on the peak viscosity, the retrogradation value and the onset temperature. These results show that, GASBD can be used for the SBD-platform technology to modify the composition and structure of starch.
Key words: GASBD gene; dot blot hybridization; pasting properties; thermodynamic property; the SBD- platform technology
目 录
前言 - 4 -
1 材料与方法 - 4 -
1.1 试剂与材料 - 4 -
1.2 方法 - 4 -
1.2.1 马铃薯淀粉的提取 - 4 -
1.2.2 Western斑点杂交分析 - 5 -
1.2.3 转基因马铃薯块茎中淀粉含量的分析 - 5 -
1.2.4 表观直链淀粉含量的测定 - 5 -
1.2.5 淀粉糊化性质的测定 - 6 -
1.2.6 淀粉热力学性质的测定 - 6 -
2 结果与分析 - 6 -
2.1 GASBD基因在马铃薯中的蛋白表达分析 - 6 -
2.2 转基因马铃薯块茎中淀粉含量的分析 - 7 -
2.3 转基因淀粉中表观直链淀粉含量的分析 - 8 -
2.4 转基因淀粉糊化特性的分析 - 8 -
2.5 转基因淀粉热力学性质的分析 - 9 -
3 结论 - 10 -
参考文献 - 11 -
致谢 - 12 -
前言
马铃薯淀粉有很多优良的特点,因此被广泛的用于制药、造纸和食品等行业。但天然淀粉在理化性质方面具有很多的局限性。由此,在利用天然淀粉之前一般需要经过化学或者物理方法处理。由于应用化学或者物理方法对天然淀粉进行改性的成本是昂贵的,因此,可以在植物体内利用基因工程的方法来对淀粉的结构和组成进行修饰,从而使淀粉获得新的功能并且具有显著的环境和经济效益。