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首页> 外文期刊>Journal of Plant Physiology >Functional analysis of the buckwheat metallothionein promoter: Tissue specificity pattern and up-regulation under complex stress stimuli
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Functional analysis of the buckwheat metallothionein promoter: Tissue specificity pattern and up-regulation under complex stress stimuli

机译:荞麦金属硫蛋白启动子的功能分析:复杂应激刺激下的组织特异性模式和上调。

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摘要

To shed light on expression regulation of the metallothionein gene from buckwheat (FeMT3), functional promoter analysis was performed with a complete 5' regulatory region and two deletion variants, employing stably transformed tobacco plants. Histochemical GUS assay of transgenic tobacco lines showed the strongest. signals in vascular elements of leaves and in pollen grains, while somewhat weaker staining was observed in the roots of mature plants. This tissue specificity pattern implies a possible function of buckwheat MT3 in those tissues. Quantitative GUS assay showed strong up-regulation of all three promoter constructs (proportional to the length of the regulatory region) in leaves submerged in liquid MS medium containing sucrose, after a prolonged time period. This represented a complex stress situation composed of several synergistically related stress stimuli. These findings suggest: complex transcriptional regulation of FeMT3, requiring interactions among a number of different factors.
机译:为了阐明来自荞麦(FeMT3)的金属硫蛋白基因的表达调控,使用稳定的转化烟草植株对完整的5'调控区和两个缺失变体进行了功能启动子分析。转基因烟草品系的组织化学GUS分析显示最强。叶片和花粉粒中维管信号的信号,而在成熟植物的根部则观察到较弱的染色。这种组织特异性模式暗示着荞麦MT3在这些组织中的可能功能。 GUS定量分析显示,经过较长时间后,浸没在含蔗糖液体MS培养基中的叶片中所有三种启动子构建体均强烈上调(与调节区的长度成比例)。这代表了由几种协同相关的压力刺激组成的复杂压力情况。这些发现表明:FeMT3的复杂转录调控,需要许多不同因素之间的相互作用。

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