Juvenile Photoperiodic Sensitivity in Anagallis Arvensis L. Subsp. Foemina (Mill.) Schinz & Thell

Abstract

Exposure to long days of 20 hI' light of young plants of A. arvensis, when they possess cotyledons and two slightly expanded first leaves, causes flower initiation. One long day evokes no, or only slight, response, two long days a substantial but variable response, and three complete initiation.