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Plant regeneration from protoplasts of embryogenic suspension cultures of orchardgrass (Dactylis glomerata L.)

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Abstract

An embryogenic suspension culture of orchardgrass (Dactylis glomerata L.) consisting of small, embryogenic cell clusters was obtained from callus formed on basal sections of young leaves through a process of selective enrichment. These suspensions were used as a source of protoplasts. The isolated protoplasts divided at a frequency of 0.5–10% when plated in an agarose solidified culture medium. Conditioned medium, in which embryogenic Dactylis suspension cultures had been grown, was found to increase the rate of cell colony formation. Protoplast-derived colonies grew rapidly in a bead-type culture system of floating agarose slabs in liquid medium. New suspension cultures formed as the colonies grew out of the agarose. These cultures were embryogenic and formed green plantlets when plated on a solid medium lacking auxin. The plantlets were established in soil and grown to mature plants.

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Abbreviations

B5:

medium according to Gamborg et al. (1968)

SH-x:

medium according to Schenk and Hildebrandt (1972) supplemented with x μM dicamba

dicamba:

3,6-dichloro-o-anisic acid

KM-8p:

medium 8p of Kao and Michayluk (1975)

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Author information

Correspondence to Christian T. Harms.

Additional information

Communicated by O. L. Gamborg

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Horn, M.E., Conger, B.V. & Harms, C.T. Plant regeneration from protoplasts of embryogenic suspension cultures of orchardgrass (Dactylis glomerata L.). Plant Cell Reports 7, 371–374 (1988). https://doi.org/10.1007/BF00269515

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Keywords

  • Conditioned Medium
  • Suspension Culture
  • Plant Regeneration
  • Colony Formation
  • Young Leaf