Classification of Embryogenic Cell-lines of Picea abies as Regards Protoplast Isolation and Culture
J Plant Phys. 1993, 141(2), 222-229, https://doi.org/10.1016/S0176-1617(11)80764-9(11)80764-9
Egertsdotter U, von Arnold S

Summary
Embryogenic cell-lines of Picea abies were divided into two groups based on their growth habit and the morphology of the somatic embryos. Group A grew well on solid medium and the head regions of the somatic embryos were dense, while group B grew well in suspension and the head region of the somatic embryos consisted of loosely packed cells.

Protoplasts from all cell-lines could divide and enter the embryogenic pathway. The highest proportion of dividing cells entering the embryogenic pathway was obtained from cell-lines belonging to group A cultured on solid medium. However, only the protoplast derived colonies from cell-lines belonging to group B growing as suspensions continued to grow and gave rise to many somatic embryos.

New embryogenic suspension cultures were established from protoplasts of one cell-line belonging to group B. Growth habit and embryo morphology were similar for the re-established suspension and the initial culture.

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