2. Phytochrome is a pigment that plants use to detect light. It is sensitive to light in the red and
far-red region of the visible spectrum. Many flowering plants use it to regulate the time of
flowering based on the length night. The treatments seemed
Pruning lets healthy branches absorb more of the available nutrients. If you dont prune
even healthy branches may succumb to disease or lack of nutrition if there is not enough
to support all the growth.
J. AMER. SOC. HORT. SCI. 136(1):39. 2011.
Growth of Chrysanthemum in Response to
Supplemental Light Provided by Irregular
Light Breaks during the Night
Katrine Heinsvig Kjaer1 and Carl-Otto Ottosen
Department of Horticulture, Aarhus University, Kirstinebj