The present invention provides a pOsHEN1:: OsSPL14 gene expression box for balancing the opposition of stress resistance and development of rice. The pOsHEN1:: OsSPL14 gene expression box includes OsHEN1 promoter and OsSPL14 gene. The OsSPL14 gene is connected downstream of OsHEN1 promoter. The present invention also provides a recombinant expression vector containing the pOsHEN1:: OsSPL14 gene expression box and provides the aforementioned recombination. Construction method of expression vector. The gene expression box and recombinant expression vector of the present invention can produce good yield characters of rice, such as increasing stem diameter and tiller yield, and/or improving resistance of rice to rice bacterial blight fungus PXO99A. When the transgenic lines were not invaded by PXO99A, the expression of OsSPL14 in the background of transgenic rice was increased slightly, and the characteristics of OsSPL14 regulating the ideal plant type of rice were brought into play. The tiller number was reduced properly to increase the effective tiller number, increase the lodging resistance of stem diameter and increase the yield of single tiller of rice. When the transgenic lines were invaded by PXO99A, the transcription level of downstream OsSPL14 gene was significantly increased, which could specifically enhance the resistance to bacterial blight.
【技术实现步骤摘要】
pOsHEN1::OsSPL14基因表达盒及其构建方法和应用
本专利技术涉及植物基因工程
,具体指pOsHEN1::OsSPL14基因表达盒的构建和育种应用。
技术介绍
Xanthomonasoryzaepv.oryzae,Xoo是引起水稻白叶枯病的致病菌。水稻白叶枯病在我国各稻区均有发生,为水稻主要病害。高温下秧苗病斑短条状,小而狭,扩展后叶片很快枯黄凋萎,秕谷和碎米多,减产达20%-30%,重的可达50%-60%,甚至颗粒无收,对产量影响较大。因此极有必要通过基因工程提高水稻对白叶枯病抗性。植物包括农作物大都固着在生长地,它们可以根据一直在变化的外界环境而改变内源生长发育的信号网络,从而更好地适应外界环境。当遭遇病原菌侵染时,植物会将能量从生长发育方面调节到防御信号网络上,因此抗病的过程往往表现为抑制生长发育。为了提高农作物的抗病性,实验室里的相关研究筛选了一批组成型激活抗性反应的突变体。这些突变体往往表现为细胞死亡,高表达抗病相关基因,抗性物质高累积,最终能有效地抑制细菌或者真菌的繁殖,但是这些突变体在生长发育方面大都有植株矮化,育性降低,种子产量下降 ...
【技术保护点】
1.pOsHen1::OsSPL14基因表达盒,其特征在于,所述pOsHEN1::OsSPL14基因表达盒包括OsHEN1启动子和OsSPL14基因,所述OsSPL14基因连接于OsHEN1启动子下游。
【技术特征摘要】
1.pOsHen1::OsSPL14基因表达盒,其特征在于,所述pOsHEN1::OsSPL14基因表达盒包括OsHEN1启动子和OsSPL14基因,所述OsSPL14基因连接于OsHEN1启动子下游。2.含有权利要求1所述pOsHEN1::OsSPL14基因表达盒的重组表达载体。3.根据权利要求2所述的重组表达载体,其特征在于,所述重组表达载体为将权利要求1所述的pOsHen1::OsSPL14基因表达盒插入到pCAMBIA1305.1质粒载体的EcoRI和HindIII位点之间得到。4.权利要求1所述的pOsHEN1::OsSPL14基因表达盒或权利要求2、3所述的重组表达载体在改良水稻作物中的应用,其特征在于,所述改良包括:产生水稻优良的产量性状和/或特异提高水稻新品种对水稻白叶枯病菌PXO99A的抗性。5.根据权利要求4所述的应用,其特征在于,所述优良的产量性状包括提高有效分蘖数,和/或增加茎粗增强抗倒伏能力,和/或提高水稻单穗产量,以提高水稻产量。6.权利要求2所述的重组表达载体的构建方法,其特征在于,所述构建方法包括如下步骤:S1:以水稻日本晴DNA为模板,以OsHEN1启动子特异引物pOsHEN1-F:tatgaccatgattacgaattcTTATGTGCACT...
【专利技术属性】
技术研发人员:杨东雷,刘明明,汪明璇,张笑寒,
申请(专利权)人:南京农业大学,
类型:发明
国别省市:江苏,32
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