Questions for Lecture 8: Growth and Development: (A) Control 
        Systems -  Growth Regulators; and (B) Photoperiodism and 
        Rhythms

•  By the end of your preparation on the two  topics( A and B), you should be able to:
Part A
 
    © 1. Present an overview of growth of plants (review on your own  Chap. 35)
 
    © 2. Locate and identify the sites of growth in a shoot, and a root (review on your own 
               Chap. 35).

    © 3. Define a growth regulator (often called a hormone) and describe some of the significant 
               modes of action of: (a)  auxin (e.g. indole acetic acid); (b)  gibberelin; (c)  cytokinin; 
               (d)  ethylene and (e) abscisic acid.

    © 4. Discuss a current theory about the regulation of the root/shoot ratio in plants.

    © 5. Discuss the benefits of plant growth regulation applications in our daily life.
 
    © 6. Discuss different types of plant movement.

    © 7. Define the following concepts and terms:  meristems; hormone; apical dominance; 
            senescence; phototropism; gravitropism; statoliths; rapid leaf movements;  sleep 
            movements.

Part B
 
    © 8. Discuss the principles by which plants respond to light.
 
    © 9. Discuss the role of phytochrome in initiating various responses, for example, flowering 
               and seed germination in plants.

    © 10. Discuss the high-intensity responses of blue and other light on plants.

    © 11. Discuss the phenomenon of circadian rhythm in plants.

    © 12. Define the following concepts and terms:  Pr and Pfr forms of phytochrome; 
                photomorphogenesis; short-day and long-day plants; ³florigen².
 
 
• Outline of presentation :
            For outline of presentation and for the legends of figures, see  the Handbook for the course "Biology 121 Notes, Spring, 1998, University of Illinois, Plant Biology: Ecology and Organismic Plant Biology" by Govindjee, Stipes  Publishing, Champaign,IL.
 
    © Slides used in the class are to be found elsewhere on these Web pages.