机构地区: 河南农业大学生命科学学院
出 处: 《西北植物学报》 2014年第3期449-453,共5页
摘 要: 以玉米自交系‘昌7-2’三叶期前后2个时间点(种子萌发后5d和8d)幼苗不同组织部位的总RNA为研究对象,采用实时荧光定量PCR技术,对玉米中6个Argonaute(AGO)蛋白家族基因(AGO1、AGO2、AGO4、AGO5、AGO7和AGO10)在幼苗不同发育时期及不同组织部位的表达谱进行了研究。结果表明:(1)AGO1、AGO2、AGO4和AGO7在种子萌发后5d和8d幼苗不同组织中均有表达,种子萌发后5d幼苗中的平均表达量均高于萌发8d的幼苗,且在地上部分新生组织或细胞分裂比较旺盛的组织中表达较多,表明AGO1、AGO2、AGO4和AGO7可能在玉米幼苗发育早期的分生组织分裂生长中发挥调控作用。(2)AGO5和AGO10只在叶片和茎尖中表达,其他组织中不表达;其中AGO5主要集中在新生叶和种子萌发后8d的茎尖中,AGO10在玉米叶发育过程中可能存在着迁移的现象。 The expression profiles of 6 AGO genes(AGO1 ,AGO2 ,AGO4 ,AGO5 ,AGO7 and AGOlO)in differ- ent tissues and developmental stages of maize seedling(Zea mays L. inbred line, 'Chang 7-2 ')were analyzed by the method of real-time quantitative PCR. Results showed that: (1)AGO1 ,AGO2 ,AGO4 and AGO7 were accumulated more in the seedlings at the 5th day after maize seed germination than that at the 8th day,ex- hibiting more expression in dividing cells and newborn tissues, which indicated that AGO1,AGO2,AG04 and AGO7 might play roles in meristem of maize seedling at the early stage after germination. (2)AGO5 and AGO10 were only expressed in leaves and shoot tips,AGO5 mainly expressed in the newborn leaves and shoot tip at the 8th day after germination,while AGO10 showed migration in leaves during development.
领 域: [生物学]