Abstract
THE strawberry variety Royal Sovereign is a short-day plant, flower initiation being promoted by short photoperiods, whereas stolon formation and increased petiole length are promoted by long photoperiods1. Hartmann2 has shown that in short photoperiods parent plants of the variety Missionary are able to induce flower formation in attached runner plants growing in long photoperiods. This he interpreted as evidence of the transmission of a hypothetical flower-forming substance along the stolon in an acropetal direction.
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