WHITE, GAUTHERET and NOBECOURT

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The in vitro cultivation of plant tissues for indefinite periods of time was simultaneously achieved by WHITE working with a Nicotiana hybrid and GAUTHERET and NOBECOURT working with carrot Daucus carota in 1939. This achievement in both cases was due to a fortunate choice of plant material as both are considered to be relatively easy to culture now in comparison with many other species but this in no way negates the magnitude of their efforts.

The callus cultures obtained by WHITE and GAUTHERET consisted mainly of vacuolated parenchymatous cells in amongst which small clumps of intensely active meristematic cells were dispersed.