Over-expression of an Arabidopsis δ-OAT gene enhances salt and drought tolerance in transgenic rice中国科学通报：英文版论文
【题名】：Over-expression of an Arabidopsis δ-OAT gene enhances salt and drought tolerance in transgenic rice中国科学通报：英文版论文(Over-expression of an Arabidopsis δ-OAT gene enhances salt and drought tolerance in transgenic riceZhongGuoKeXueTongBao：YingWenBanLunWen) 【关键词】：转基因大米 抗旱能力 脯氨酸 农业 【keywords】：ZhuanJiYinDaMi KangHanNengLi FuAnSuan NongYe 【作者】：WULiangqi FANZhanmin GUOLei LIYongqing ZHANGWenjing QULi-Jia CHENZhangliang      【来源】： 知识词典 【期刊名称】：中国科学通报：英文版(ZhongGuoKeXueTongBao：YingWenBan) 【国际标准刊号】：1001-6538        【国内统一刊号】： 【作者单位】：TheNationalLaboratoryofProteinEngineeringandPlantGeneticEngineering,CollegeofLifeSciences,PekingUniversity,Beijing100871,China(TheNationalLaboratoryofProteinEngineeringandPlantGeneticEngineering,CollegeofLifeSciences,PekingUniversity,Beijing100871,China) 【分类号】：S511      【页码】：-2594-2600      【出版年】：2003.23 【下载地址】：下载pdf全文         δ-OAT, ornithine-δ-aminotransferase, is the key enzyme involved in proline biosynthesis. In this study the Arabidopsis δ-OAT gene was transferred into rice (Oryza sativa L. ssp japonica cv. Zhongzuo 321), whose successful integration was demonstrated by PCR and Southern blot analysis. The over-expression of the gene in transgenic rice was also confirmed. Biochemical analysis showed that, under salt or drought stress conditions, proline contents in the leaves and roots in transgenic rice plants were 5- to 15-fold of those in non-transgenic controls. Under stress conditions, germinating rate of transgenic lines is higher than that of controls. Although the growth of rice plants tested were more and more retarded with the increasing of NaCI concentration, the transgenic plants grow faster compared to the controls under the same stress condition. Meanwhile, the resistance to KCl and MgSO4 stresses was also found enhanced in transgenie rice. Furthermore, the over-expression of δ-OAT also improved the yield of transgenic plants under stress conditions. The average yield per plant of transgenic lines increases about 12%--41% more than that of control line sunder 0.1 mol/L NaCI stress. These data indicated that the over-expression of δ-OAT, with the accumulation of proline, resulted in the enhancement of salt and drought tolerance and an increase of rice yield, which is of significance in agriculture.
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