What is cytoplasmic streaming? Give an example of a plant where cytoplasmic streaming can be observed.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Cytoplasmic streaming (also called cyclosis) is the continuous, automatic movement of cytoplasm within living cells. This vital process:
- Facilitates distribution of nutrients, organelles, and metabolites
- Enhances intracellular transport
- Requires energy from ATP and involves motor proteins (myosin) interacting with actin filaments
Example: In the aquatic plant Hydrilla verticillata, cytoplasmic streaming is easily observable under a microscope. The movement of chloroplasts along the cell periphery demonstrates this phenomenon vividly.
Other Examples:
- Elodea (waterweed)
- Chara (stonewort)
- Root hair cells of onion
Biological Significance:
- Accelerates metabolic reactions
- Distributes heat uniformly
- Facilitates rapid response to stimuli
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