Which of the pigments was carried over in land plants from aquatic ancestors? Are these pigments adaptations to high or low light environments?

Human Anatomy & Physiology (11th Edition)
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Which of the pigments was carried over in land plants from aquatic ancestors? Are these pigments adaptations to high or low light environments?

### Illustration of Pigment Separation Using Chromatography

This diagram represents a chromatographic separation of plant pigments, showing how different pigments migrate different distances in a solvent. The test is conducted in a cylindrical container with a solvent.

**Diagram Explanation:**

- **Solvent Front:**
  - The topmost line in the diagram, marked by a horizontal line, represents the furthest point reached by the solvent as it moves upwards through the stationary phase (the material within the tube).

- **Carotene:**
  - Appears just below the solvent front as an orange band. Carotene is highly soluble in the solvent, thus traveling the furthest distance.

- **Xanthophyll:**
  - Depicted as a yellow band below carotene. Xanthophylls are less soluble than carotene and cease their migration sooner.

- **Chlorophyll a:**
  - Seen as a green band positioned below xanthophyll. Chlorophyll a has moderate solubility compared to the other pigments.

- **Chlorophyll b:**
  - The lowest green band in the sequence, chlorophyll b is least soluble and migrates the shortest distance.

### Educational Context:

Chromatography is a method used to separate mixtures into their component parts, based on differences in solubility and adsorption. This diagram demonstrates the separation of pigments present in leaves, providing insights into their different solubility characteristics. Understanding these processes is crucial in fields like botany and biochemistry, where the composition of plant materials is analyzed.
Transcribed Image Text:### Illustration of Pigment Separation Using Chromatography This diagram represents a chromatographic separation of plant pigments, showing how different pigments migrate different distances in a solvent. The test is conducted in a cylindrical container with a solvent. **Diagram Explanation:** - **Solvent Front:** - The topmost line in the diagram, marked by a horizontal line, represents the furthest point reached by the solvent as it moves upwards through the stationary phase (the material within the tube). - **Carotene:** - Appears just below the solvent front as an orange band. Carotene is highly soluble in the solvent, thus traveling the furthest distance. - **Xanthophyll:** - Depicted as a yellow band below carotene. Xanthophylls are less soluble than carotene and cease their migration sooner. - **Chlorophyll a:** - Seen as a green band positioned below xanthophyll. Chlorophyll a has moderate solubility compared to the other pigments. - **Chlorophyll b:** - The lowest green band in the sequence, chlorophyll b is least soluble and migrates the shortest distance. ### Educational Context: Chromatography is a method used to separate mixtures into their component parts, based on differences in solubility and adsorption. This diagram demonstrates the separation of pigments present in leaves, providing insights into their different solubility characteristics. Understanding these processes is crucial in fields like botany and biochemistry, where the composition of plant materials is analyzed.
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