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Comprehensive analysis of regulatory elements of the promoters of rice sulfate transporter gene family and functional characterization of OsSul1;1 promoter under different metal stress

机译:不同金属胁迫下水稻转运蛋白基因家族启动子调控元件的综合分析及OsSul1; 1启动子的功能表征

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摘要

Adverse environmental conditions including heavy metal stress impose severe effects on the plant growth and development limiting productivity and yield. Studies demonstrated that changes in genome-wide expression modulate various biochemical processes and molecular components in response to heavy metal stress in plants. Some of the key components involved in such a regulation are the transcription initiation machinery, nucleotide sequence of promoters and presence of cis-acting elements. Therefore, identification of the putative cis-acting DNA sequences involved in gene regulation and functional characterization of promoters are important steps in understanding response of plants to heavy metal stress. In this study, comprehensive analysis of the proximal promoters of members of rice sulfate transporter gene family which is an essential component of stress response has been carried out. Analysis suggests presence of various common stress related cis-acting elements in the promoters of members of this gene family. In addition, transcriptional regulation of the arsenic-responsive high affinity sulfate transporter, OsSul1;1, has been studied through development of Arabidopsis transgenic lines expressing reporter gene encoding β-glucuronidase under the control of OsSul1;1 promoter. Analysis of the transgenic lines suggests differential response of the OsSul1;1 promoter to various heavy metals as well as other abiotic stresses.
机译:不利的环境条件(包括重金属胁迫)对植物的生长和发育造成严重影响,从而限制了生产力和产量。研究表明,全基因组表达的变化调节了植物的重金属胁迫,从而调节了各种生化过程和分子成分。参与这种调节的一些关键成分是转录起始机制,启动子的核苷酸序列和顺式作用元件的存在。因此,鉴定参与基因调控和启动子功能表征的推定的顺式作用DNA序列是理解植物对重金属胁迫的响应的重要步骤。在这项研究中,已对作为压力响应的重要组成部分的硫酸米转运蛋白基因家族成员的近端启动子进行了综合分析。分析表明该基因家族成员的启动子中存在多种常见的应激相关顺式作用元件。此外,已经通过开发表达在OsSul1; 1启动子控制下表达报告基因的β-葡萄糖醛酸苷酶报告基因的拟南芥转基因株系,研究了砷响应性高亲和力硫酸盐转运蛋白OsSul1; 1的转录调控。转基因品系的分析表明,OsSul1; 1启动子对各种重金属以及其他非生物胁迫的差异反应。

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