Question

What are plastids? Name the different types of plastids found in plant cells.

Answer 1

Plastids are cell organelles of plant cells which contains pigments responsible for attraction or storage or production of food.
They are mainly of three types.
1) Chromoplast: It contains pigments of yellow, orange and red colours. It contains carotene and xanthophyll.
2) Chloroplasts: They contain a green pigment known as chlorophyll. It is a raw material for photosynthesis.
3) Luecoplasts: They don't contain any pigments. They are just responsible for storing food materials like starch as in case of potatoes.
Note: Blue or Purple colours or their shades are not due to plastids but they are due to anthocynin present in vacuole.

Thanks.

Answer 2

Answer:

Types of Plastids

• Chloroplasts.
• Chromoplasts.
• Gerontoplasts.
• Leucoplasts.

Explanation:

The plastid   formed, molded – plural plastids) is a membrane-bound organelle found in the cells of plants, algae, and some other eukaryotic organisms? They are considered to be intracellular endosymbiotic cyanobacteria. Examples include chloroplasts (used for photosynthesis), chromoplasts (used for pigment synthesis and storage), and leucoplasts (non-pigmented plastids that can sometimes differentiate).

The event which led to permanent endosymbiosis in the Archaeplastida clade (of land plants, red algae, and green algae) probably occurred with a cyanobiont (symbiotic cyanobacteria) related to the genus Gloeomargarita, around 1.5 billion years ago. A later primary endosymbiosis event occurred in photosynthetic Paulinella amoeboids about 90–140 million years ago. This plastid belongs to the "PS-clade" (of the cyanobacterial genera Prochlorococcus and Synechococcus). Secondary and tertiary endosymbiosis has also occurred, in a wide variety of organisms; additionally, some organisms sequester ingested plastids in a process that is known as kleptoplasty.

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