Development of rapid floral induction technique for trees by production of flowering hormone through root system.

树木在开花前需要几年到几十年的漫长的幼年期。在杂交育种中，一种有效的开花诱导方法是缩短育种周期的有效方法。本研究以发根农杆菌为基因转移载体，以烟草植株为模式植物，建立了一种利用发根农杆菌诱导插条产生开花激素的技术。我们已经成功地快速诱导开花，而不需要对地上部分进行遗传转化。

Trees require a long juvenile phase for years to decades before flowering. An efficient method for floral induction is effective in shortening the breeding period in crossbreeding. In the present study, we developed a technique for producing flowering hormone through root system that induced in a cutting by Agrobacterium rhizogenes as a gene transfer vector, and Nicotiana plants were used as model plants. We have succeeded in rapidly inducing flowering without genetic transformation of aerial parts.