日長感応を受けた葉の除去がアサガオの花芽形成に及ぼす影響

抄録

1) The effect of the removal of a photoinduced leaf upon flowering response in Pharbitis Nil was studied in plants which had only one leaf and the bud in its axil left. Upon the removal of the donor leaf after a 14-16 hour dark period a minimal flowering response occurred in the developing axillary bud. This indicates that in this duration the stimulus was transmitted from the leaf in a sufficient amount to effect flowering. With increasing dark period before defoliation the response increases.
2) The effect of a dark period of sufficient duration is not destroyed by a following light period. Delayed defoliation results in increased response, even if the photoinduced leaf is illuminated.