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Corn and mustard seedlings grown either in the light or the dark

Corn and mustard seedlings grown either in the light or the dark. Lettuce seed germination is a typical photoreversible response . Absorption spectra of purified phytochrome in the Pr and Pfr forms overlap.

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Corn and mustard seedlings grown either in the light or the dark

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  1. Corn and mustard seedlings grown either in the light or the dark

  2. Lettuce seed germination is a typical photoreversible response

  3. Absorption spectra of purified phytochrome in the Pr and Pfr forms overlap

  4. Three types of phytochrome responses, based on their sensitivities to fluence

  5. LFR action spectra for photoreversible stimulation / inhibition of seed germination

  6. Structure of the Pr and Pfr forms of the chromophore

  7. Figure 17.7 Several structural domains in phytochrome and cellular changes it mediates

  8. N-terminal portion of a bacterial phytochrome

  9. Figure 17.9 (B) Plant phytochrome

  10. Figure 17.10 Nuclear localization of phy–GFP in epidermal cells of Arabidopsis hypocotyls

  11. Figure 17.11 Phytochrome deficiencies alter growth and development in pea and tomato

  12. Figure 17.12 Differences in phytochrome gene family structure and function

  13. Phytochromeactivity is modulated by phosphorylation status

  14. Phytochrome activation affects membrane potential (~5 sec) • Phytochrome affects transcription (lag time of less than 5 min)

  15. Transcriptional regulation • Phytochrome interacting factors (PIFs) act as negative regulators of phytochrome response: PIF mutants exhibit a constituativephotomorphogenic response even when plants are grown in the dark. • Phytochrome initiates degradation of PIFs in the nucleus

  16. Shade avoidance

  17. Figure 25.23 Phytochrome control of flowering by red (R) and far-red (FR) light

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