Chapter 16 Study Questions
- Distinguish between the following types of plant responses to sunlight: solar tracking, photoblasty, photomorphogenesis, phototropism, photonasty, nyctinasty, and photoperiodism.
- Discuss how comparisons of absorption spectra and action spectra have aided the identification of phytochrome as the photoreceptor involved in red/far-red responses.
- Describe the three main categories of phytochrome responses and the types of phytochromes that regulate them.
- Discuss the role of phytochrome interacting factors (PIFs) in photomorphogenesis.
- What are cryptochromes and how do they function during photomorphogenesis?
- Create a diagram showing the signal transduction pathway for phototropin-mediated, blue light-induced stomatal opening.
Textbook Reference: Introduction, p. 447
Textbook Reference: Plant Photoreceptors, pp. 450–451
Textbook Reference: Phytochrome Responses, pp. 457–459
Textbook Reference: Phytochrome Signaling Pathways, pp. 460–461
Textbook Reference: Cryptochromes, pp. 463–466
What are phototropins and how are they regulated by blue light?
Textbook Reference: Phototropins, pp. 467–470
Textbook Reference: pp. 471–473