Chapter 16 Study Questions

Chapter 16 Study Questions

  1. Distinguish between the following types of plant responses to sunlight: solar tracking, photoblasty, photomorphogenesis, phototropism, photonasty, nyctinasty, and photoperiodism.

    2. Textbook Reference: Introduction, p. 447

  2. Discuss how comparisons of absorption spectra and action spectra have aided the identification of phytochrome as the photoreceptor involved in red/far-red responses.

    3. Textbook Reference: Plant Photoreceptors, pp. 450–451

  3. Describe the three main categories of phytochrome responses and the types of phytochromes that regulate them.

    4. Textbook Reference: Phytochrome Responses, pp. 457–459

  4. Discuss the role of phytochrome interacting factors (PIFs) in photomorphogenesis.

    5. Textbook Reference: Phytochrome Signaling Pathways, pp. 460–461

  5. What are cryptochromes and how do they function during photomorphogenesis?

    6. Textbook Reference: Cryptochromes, pp. 463–466

    What are phototropins and how are they regulated by blue light?

    Textbook Reference: Phototropins, pp. 467–470

  6. Create a diagram showing the signal transduction pathway for phototropin-mediated, blue light-induced stomatal opening.

    7. Textbook Reference: pp. 471–473

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