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The growth of cell aggregates from a rye suspension culture was tested at low density in three culture systems. Mass seeding was the most supportive system, followed by agarose droplets. Microdroplet culture using Cuprak dishes was the least effective system. Growth was stimulated by the presence of a feeder layer of suspension cells but only if the feeder contact with the nursed cells was via a liquid and not a gaseous phase. Plating efficiences were enhanced by the feeder effect, whereas the subsequent growth rates were less affected. The techniques described should prove useful in programs aimed at the in vitro genetic manipulation of rye or other cereals.Abbreviations 2,4-D
2, 4 — dichlorophenoxy acetic acid
- PE
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