Storage Function of Leucoplasts

Leucoplasts are a type of plastid found in plant cells and are primarily responsible for storing reserve materials. They are non-pigmented organelles. Specific types of leucoplasts include:

• Amyloplasts: Store starch granules.
• Elaioplasts: Store oils and fats.
• Proteinoplasts: Store protein granules.

Therefore, leucoplasts collectively serve as the storage site for starch, oil, and protein granules.

Why Not Other Plastids?

Chloroplasts are mainly involved in photosynthesis and may store starch temporarily as a byproduct, but their primary role is not long-term storage of diverse reserves like oil and proteins.

Chromoplasts contain pigments (carotenoids) that give color to flowers and fruits, aiding in attracting pollinators or seed dispersers. They are not specialized for storing starch, oil, or protein granules.

While all plastids encompass chloroplasts, chromoplasts, and leucoplasts, the specific organelle fulfilling the described storage function is the leucoplast.

Conclusion on Storage Organelle

Based on their specialized functions, leucoplasts are the cell organelles that store starch, oil, and protein granules.