Summary
Observations on leaves of chimeras of the types L1+L2 green: L3 yellow, L1 green: L2 yellow: L3 green and L1 green: L2+L3 yellow suggest first that only the epidermis of a leaf traces back to L1, secondly that most leaf tissues trace back to L2, and thirdly that an area in the centre of leaflets traces back to L3. Chimeras of the type L1 green: L2+L3 yellow are stable and only a very occasional leaflet shows a small patch of green tissue.
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References
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Howard, H.W. The contributions of growing-point layers L1, L2 and L3 to potato leaves. Potato Res 21, 27–30 (1978). https://doi.org/10.1007/BF02362256
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DOI: https://doi.org/10.1007/BF02362256