Main pigment in phaeophyceae (Brown algae) is

Options

A. phycocyanin
B. phycoerythrin
C. fucoxanthin
D. chlorophyll b

Answer

To answer the question regarding the main pigment in Phaeophyceae (Brown algae), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Group**: Understand that Phaeophyceae refers to brown algae. This group is characterized by its distinct coloration and the presence of specific pigments.

2. **List Possible Pigments**: The question provides several options for pigments: phycocyanin, phycoerythrin, phycoxanthin, and chlorophyll b.

3. **Analyze Each Option**:
- **Phycocyanin**: This pigment is typically found in cyanobacteria and some algae, giving a blue color. It is not a main pigment in brown algae.
- **Phycoerythrin**: This pigment is found in red algae (Rhodophyta) and contributes to their red coloration. It is also not a main pigment in brown algae.
- **Chlorophyll b**: This pigment is primarily found in green algae and is not present in brown algae.
- **Phycoxanthin**: This is a specific pigment found in brown algae, contributing to their characteristic brown color.

4. **Determine the Main Pigment**: Based on the analysis, the main pigment present in Phaeophyceae (brown algae) is phycoxanthin.

5. **Select the Correct Option**: The correct answer to the question is therefore **phycoxanthin**.

### Final Answer:
The main pigment in Phaeophyceae (Brown algae) is **phycoxanthin**.

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