摘要
发根农杆菌(Agrobacterium rhizogenes)R1600菌株感染绞股蓝(Gynostemma pentaphyllum(Thunb.)Makino)叶外植体10天后,在外植体切口处便出现毛状根,28天后,转化率高达94%。毛状根经Southern分析,证明确已被转化。毛状根生长速度很快,在无激素的MS培养基中悬浮培养20天,其生物量增加9倍,并无愈伤组织产生。毛状根中总皂甙含量约为自然根的2倍。在悬浮培养过程中,培养物向培养基中分泌一定量的皂甙。
Authors report here the establishment of an efficient transformation system for Gynostemma pentaphyllum (Thunb. ) Makino using Agrobacterium rhizogenes Rl600. Haity roots appeared on leaf explants 10 days after inoculation with the bacteria . Frequency of the explants transformed by R1600 was up to 94%. Transformation was confirmed by Southern analysis. Biomass of hairy root cultures suspended in hormone-free MS medium increased 9 times after 20 days of incubati- on. There was no callus formation on the hairy roots during suspension culture. Saponin content in the hairy root cultures was about 2 times as much as in the natural roots, saponins of the hairy root cultures were also released into growth medium as well.
关键词
绞股蓝
发根农杆菌
毛状根
皂甙
Gynostemma pentaphyllum
Agrobacterium rhizogenes
Hairy root
Saponin
