摘要
根据已知序列设计PCR引物,分别扩增氨基环丙烷羧酸合酶(ACS)和氨基环丙烷羧酸氧化酶(ACO)基因并克隆到中间载体,经限制性内切酶酶切图谱分析、部分序列分析以及Southern印迹鉴定后,将两个基因单个或相互串联后反向亚克隆至植物表达载体pBI121。经农杆菌LBA4404转化番茄子叶,在抗性培养基上得到8株ACS基因反义转化的生根小苗以ACS基因的酶切小片段作为探针,经Southern印迹分析,证明获得了两株阳性转化株。
According to the published sequences, PCR primers of lundnocyclopropane-1-lcarboxylate (ACS) and l-aminocyclopropane-lcarboxylate oxidase (ACO) gene of tomato amplification were designed. Fragments of ACS and ACO gene were generated. The products of PCR fragments and T-vector ligation were transformed into E. colt (DH5a).The recombinants were selected by blue-white colony screening and restriction analysis.After partial sequencing and Southern hybridization, the fragments and stringed products o f two genes were subcloned into plant gene expression vector pBllZI in antisense orientation. The antisense vectors were transformed into Agrobaterium tumefaciens LBA4404 by freeze-thaw method. Fourteendayxild cotyledon pieces were infected with Agrobacterium,and transformants were selected with 75 ig nil-l kanamycin. Southern blotting with 0.gkb fragments of ACS gene as probe provided that two positively transgenic plantletS were obtained.
出处
《热带亚热带植物学报》
CAS
CSCD
1998年第2期105-110,共6页
Journal of Tropical and Subtropical Botany
关键词
番茄
反义技术
转基因植物
ACS基因
ACO基因
Tomato, 1-AAnnocyclopropane-1-carboxylate synthase (ACS) gene, ACCoxidase (ACO) gene, Antisense technique, Transgenic plant