中文摘要：

【目的】了解干旱胁迫下大豆幼苗根系的抗旱机制。【方法】利用基因芯片技术,分析在不同干旱胁迫时间下强抗旱品种晋豆23幼苗根部基因的表达情况。【结果】获得了61171个大豆根系基因的差异表达动态图谱。在不同干旱胁迫时间下根部基因的表达发生变化,3个时间点下,下调表达的基因数量均多于上调表达的基因数量。同时对杂交数据进行多种聚类分析。利用实时荧光定量PCR验证4个基因在干旱胁迫条件下的差异表达,其结果和芯片杂交分析的结果基本一致。【结论】初步建立了大豆幼苗根系干旱胁迫应答基因的动态表达谱,并通过其动态表达了解植物与逆境的互作机制,比较全面地获得了干旱胁迫应答基因,从而更完整地揭示了大豆干旱胁迫应答基因的表达情况。

英文摘要：

【Objective】 The objective of this experiment is to study the mechanism of drought resistance in soybean seedling roots. 【Method】 The gene expression of drought-tolerant soybean roots was analyzed under different times of drought stress by cDNA microarray chip. 【Result】 The expression profile of 61 171 genes was obtained. Great changes took place in soybean roots under drought stress and the number of induced genes was more than that of repressed genes. The differential expressions of four genes were confirmed by real-time quantitative PCR and the results indicated that the expression changes of these genes were generally consistent with the results of gene chip. The clustering analysis of hybridization was also carried out to indicate gene expression under drought stress. 【Conclusion】 Expression profiles of different drought-stress times were constructed in order to establish dynamic expression profiles, by which the mutual mechanism between drought tolerance and soybean is entirely acquired, genes responding to drought stress were obtained and gene expression of drought tolerance is completely revealed.