野葛幼叶细胞悬浮培养生产葛根素等异黄酮类化合物的研究

Production of puerarin and other isoflavones in cell suspension cultures in leaves of Pueraria lobata seedling

目的 建立野葛幼叶细胞悬浮培养体系。方法 将由野葛幼叶外植体诱导的愈伤组织进行悬浮培养 ,研究了悬浮培养物生长的动态和葛根素及总异黄酮类化合物产量积累的动态。结果 细胞在培养的第 1～ 5天为对数生长期 ,第 8天时细胞干重达最大值。葛根素的合成与细胞生长呈紧密偶联型 ,在第 8天时葛根素产量达最大值。总异黄酮类化合物的积累与葛根素积累存在一定差异 ,异黄酮类化合物的总产量在第 10天最大值。结论 野葛幼叶细胞悬浮培养体系中总异黄酮类化合物的产量高于野生原植株 ,葛根素产量低于野生原植株。

Object To establish cell suspension culture system in leaves of seedling of Pueraria lobata (Willd.) Ohwi Methods The callus induced from leaf explants of P.lobata seedling were suspended in liquid medium. The time courses of cell growth and yields of puerarin and isoflavones were studied Results The log phase of the cell cultures' growth was from 1st d through 5th d. The dry weight accumulation reached highest on 8th d. The production of puerarin was highly coupled with the cell growth. The yield of puerarin reached highest on 8th d. However, the accumulation of total isoflavones was different from that of puerarin. The yield of total isoflaones reached the highest on 10th d Conclusion The yield of total isoflavones in cell suspension culture system is higher than that in wild plants, while the yield of puerarin is lower than that in wild plants