The chemical substances found most abundantly in the middle lamella is released into the phragmoplast by

Options

A. Spindle fragments
B. Interzonal fibres
C. Endoplasmic reticulum
D. Golgi complex.

Answer

**Step-by-Step Solution:**

1. **Understanding the Middle Lamella**: The middle lamella is a thin layer that is found between the cell walls of adjacent plant cells. It primarily consists of pectin, a type of polysaccharide.

2. **Role of the Golgi Complex**: The Golgi complex (or Golgi apparatus) is an organelle in eukaryotic cells that is responsible for processing and packaging macromolecules, including proteins and lipids.

3. **Release of Substances**: The chemical substances that are found abundantly in the middle lamella, such as pectin, are synthesized and processed in the Golgi complex.

4. **Transport to the Phragmoplast**: The Golgi complex releases these substances into the phragmoplast, which is a structure that helps in the formation of the cell plate during cell division in plant cells.

5. **Conclusion**: Therefore, the chemical substances found most abundantly in the middle lamella are released into the phragmoplast by the Golgi complex.

**Final Answer**: The Golgi complex.

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