摘要： On the MS medium supplemented with 2 ppm 2,4-D,calli were induced after 4-6weeks from the petioles of an American celery plant （Apium graveolens var.Dulce pers.cv.Florida）.Suspension culture was started from the calli in a hormone-free liquid MS medium on agyratory shaker at 110 rpm,and kept at 26℃.To stimulate cell division and dedifferentiation,thesubcultures were conducted for 7 days each on the same medium.The liquid suspension containingsingle cells,cell aggregates,and somatic embryos in different stages were screened 2-3 weekslater and 1.0-1.5mm somatic embryos were obtained.These embryos were encapsulated withsodium alginate by dropping-bead method and solidified with 0.1mol CaCl₂,.These synthetic seedsgerminated and developed well into seedlings in the sterilized vermiculite substrate.

关键词: Apium graveolens var. Dulce pers., cell culture, somatic embryogenesis, synthet-ic seeds