Summary
The short-day plant Kalanchoe blossfeldiana was grown on short photoperiods and was given supplementary light of low intensity (4–7 lux). If the supplementary light was supplied to the upper sides of the leaves flowering was strongly inhibited. Irradiation of the lower sides was much less effective.
Literatur
Chailakhyan, M. Kh.: Photoperiodism of individual parts of the leaf, its halves. C. R. (Dokl.) Acad. Sci. URSS 48, 360–364 (1945).
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Bünning, E., Moser, I. Unterschiedliche photoperiodische Empfindlichkeit der beiden Blattseiten von Kalanchoe blossfeldiana . Planta 69, 296–298 (1966). https://doi.org/10.1007/BF00384881
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DOI: https://doi.org/10.1007/BF00384881