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ZHANG Li-juan LIANG Wei-hong LIU Yue-xia LIU Xiao-fei HOU Cheng-qian BI Jia-jia 《中国农业科学(英文版)》2008,7(7)
OsRacD, belonging to rice (Oryza sativa L. ssp. japonica) Rho family of the small GTPases, is a pivotal gene involved in rice photoperiod fertility conversion of photoperiod sensitive genie male sterile rice which influences the rice fertility via controlling the pollen tube growth. Using OsRacD as bait, two GDP dissociation inhibitor genes designated as OsRhoGDI1 and OsRhoGDI2 were screened by yeast two-hybrid system. To further study the regulation mechanism of OsRhoGDIs, and also the relationships between OsRhoGDIs and OsRacD, the upstream regulation sequences of OsRhoGDI1 and OsRhoGDI2 were cloned by PCR, and the cis-elements in the promoters were predicted using internet tools in this study. The results showed that there were several kinds of response elements, such as phytohormone response elements, light- regulated elements and adversity induced elements in the promoters of OsRhoGDIs, some of which were similar. Comparing with the promoter of OsRacD, several pollen tube germination related elements were found. On one hand, the expression and regulation mechanism of OsRhoGDIs were complex, they may be regulated by several signaling pathways commonly, and the regulation mechanisms were similar to some extent. On the other hand, it was suggested that the fertility of photoperiod sensitive genie male sterile rice may be controlled by the cooperative expression of OsRhoGDIs and OsRacD. 相似文献
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水稻OsRhoGDI1和OsRhoGDI2基因是通过酵母双杂交技术从幼穗中分离的新基因,其编码产物是与水稻Rho蛋白OsRacD相互作用的一类活性调控蛋白。为研究这2种OsRhoGDIs基因在幼穗组织中的表达特点,通过PCR扩增的方法制备了探针模板,并采用随机引物标记的方法,以地高辛对探针进行了标记,进而利用这2种探针与水稻幼穗组织石蜡切片进行RNA原位杂交,结果表明,OsRhoGDI1和OsRhoGDI2在幼穗组织中都有表达,但OsRhoGDI2基因的转录水平明显高于OsRhoGDI1基因,提示OsRhoGDI2可能是调控OsRacD活性的主要类型。 相似文献
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两种水稻OsRhoGDIs基因启动子的克隆及分析 总被引：4，自引：1，他引：4
【目的】OsRacD属于水稻小GTP结合蛋白Rho家族,是与光敏核不育水稻光周期育性转换相关的关键基因,功能之一是通过控制花粉管的延伸生长影响水稻的育性。在采用酵母双杂交技术,筛选到与OsRacD相互作用的两种鸟苷酸解离抑制因子的编码基因OsRhoGDI1和OsRhoGDI2的基础上,为深入分析OsRhoGDIs的调控机制以及与OsRacD的关系,对其上游调控序列进行克隆和分析。【方法】采用PCR方法克隆了OsRhoGDI1和OsRhoGDI2的上游调控序列,并利用网络工具对启动子顺式作用元件进行预测。【结果】两种OsRhoGDIs基因具有与激素应答、光调控及胁迫诱导应答相关元件,且一些元件相同或相似;OsRhoGDIs与OsRacD启动子元件的比较显示,都具有与花粉管萌发相关的多个元件。【结论】OsRhoGDIs的表达调控方式复杂,可能受多条信号通路的共同调控;同时也提示OsRhoGDIs与OsRacD基因可能通过协同表达控制光敏核不育水稻的育性。 相似文献
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