EBK BIOLOGY
5th Edition
ISBN: 8220101337627
Author: Maier
Publisher: PEARSON
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Chapter 25, Problem 2AAATB
Summary Introduction
To write:
The process to induce poinsettia to bloom during the summer.
Introduction:
A biological response that is bound to a change in the proportion of light and dark within a 24-hour cycle called Photoperiodism. Poinsettia belongs to a short-day plant because it will not flower if day length surpasses a critical value. Short-day plants tend to bloom when day length is short. Poinsettia flower in the month of December. Long-day plants bloom only if day length is longer than a critical value. Long-day and short-day plants are actually reacting to the concentrations of two forms of a protein called phytochrome.
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