转基因玉米中Cry1Ab/c基因的绿色组织向表达,使用Cre/loxP系统作为对抗类害虫的替代策略
Guangsheng Yuan1, Jiaxin Shi1, Jiahao Shi1
1State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region of Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China.
Journal of economic entomology
|September 7, 2023
概括
这项研究在转基因玉米中引入了Cre/loxP系统,以控制转基因表达,确保Cry1Ab/c等蛋白质积聚在绿色组织中,而不是可食用部分.
科学领域:
- 农业生物技术 农业生物技术
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 公众对可食用玉米组织中的转基因蛋白质存在担忧.
- 控制特定植物组织中的转基因表达对于生物安全至关重要.
研究的目的:
- 开发一种基于Cre/loxP的策略,用于在玉米中的组织特异性转基因表达.
- 确保转基因产品仅限于不可食用的绿色组织,避免在中积累.
主要方法:
- 使用Cre/loxP系统生成转基因玉米系,具有组织特异性促进体 (Zm1rbcS) 和终结体 (NosT).
- 交叉的玉米线激活CRE复合酶,使Cry1Ab/c在绿色组织 (叶子,茎) 中表达,同时阻止它在非绿色组织 (根,核) 中表达.
- 评估了Cry1Ab/c的积累和生物活性,对抗类虫害 (Ostrinia furnacalis,Spodoptera frugiperda).
主要成果:
- Cry1Ab/c蛋白在绿色组织 (叶子,茎) 中呈现高积累,在可食用的核组织中呈现微小至不存在的水平.
- 转基因玉米对Ostrinia furnacalis和Spodoptera frugiperda表现出显著的耐药性,死亡率高于97.2%,损伤量小于2.2.
- 该Cre/loxP系统有效地控制了转基因表达,将功能蛋白定位到所需的植物部位.
结论:
- 克雷/loxP系统为转基因玉米提供了一种新的基因工程方法,将转基因表达局限于不可食用的绿色组织.
- 该战略解决了公众对转基因食品安全的担忧,通过防止可食部分的蛋白质积累.
- 这些发现支持开发更安全的转基因作物,并可以缓解公众对使用转基因作物的担忧.
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