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Article: Using the Kalanchoe daigremontiana plant to show the effects of photoperiodism on plantlet formation.
- Article from:
- Science Activities
- Article date:
- June 22, 2002
- Author:
CopyrightCOPYRIGHT 2002 Heldref Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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The photoperiod refers to the number of hours of light in a 24-hr. period, such as a 10-hr. photoperiod. Many plants are affected by the photoperiod. For example, the formation of flowers and bulbs often requires a certain photoperiod. A plant that responds only if the photoperiod is less than a certain value is called a short-day plant. A plant that responds only if the photoperiod is more than a certain value is called a long-day plant.
The formation of plantlets on the leaves of the houseplant devil's backbone is also controlled by the photoperiod. Devil's backbone is an excellent plant for classroom phototropism experiments that can answer several interesting ...