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Role of Phytochromes in Shade Avoidance Ecophysiological and Molecular aspects

Role of Phytochromes in Shade Avoidance Ecophysiological and Molecular aspects

Role of Phytochromes in Shade Avoidance Ecophysiological and Molecular aspects. Shade avoidance syndrome. Plants adapt to changes in light conditions -Shade Avoidance Syndrome-. photon fluence rate in 10 nm band centered on 660 nm photon fluence rate in 10 nm band centered on 730 nm.

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845 views • 44 slides
Plant Reproduction and Development

Plant Reproduction and Development

Plant Reproduction and Development. Chapter 32. Control of Development. Inheritable, internal mechanisms govern plant development Environmental cues turn such mechanisms on or off at different times, in different seasons . Seed Germination.

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600 views • 30 slides
Bonus #2 is due F 3/21

Bonus #2 is due F 3/21

Bonus #2 is due F 3/21. Circadian Rhythms: daily patterns set by light (northern flying squirrel). CB 48.25. Action spectrum of photosynthesis. CB 10.9. Seedling germination may depend on light. CB 39.18. Phytochrome: a reversible receptor. CB 39.20.

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399 views • 26 slides
Etiolated plant

Etiolated plant

Etiolated plant. Light grown. Effective Light Qualities = Red & Blue Spectral Region s. Blue = Cryptochrome - Phototropin - Zeaxanthin Red = Phytochrome. Red Light (650-680 nm). Far-Red Light (710-740). Phytochrome = Blue Protein- Pigment (125 kDa) Pr = Red Light-Absorbing Form

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466 views • 24 slides
Growth and development

Growth and development

Growth and development. Early experiments on bending responses to light (phototropism) led to discovery of hormones. Light. Gelatin Block. Opaque cap. Control. Opaque collar. Mica sheet. Tip removed. Transparent cap. Tropisms - long term bending responses involving plant growth.

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505 views • 20 slides
Phytochrome moves to the nucleus

Phytochrome moves to the nucleus

Phytochrome moves to the nucleus. Phytochrome moves to the nucleus. In some cases phytochrome itself moves to the nucleus in a light-dependent manner. The PhyB moves to the nucleus in the Pfr form only , and transport is slow (several hrs).

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264 views • 12 slides
Phytochrome has 2 forms

Phytochrome has 2 forms

Phytochrome has 2 forms. Red-absorbing phytochrome Far red absorbing phytochrome Interconverted Two forms of the same compound Total amount same. P r. P fr. P r. P fr. In red light. P fr. P r. P fr. P r absorbs red light, changes to P fr form.

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534 views • 11 slides

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