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单词 Nassula
释义

Nassula

英语百科

Nassula

Nassula cell division
Nassula ornata, showing details of cytopharyngeal basket and macronucleus
Nassula consuming oscillatoria through its cytopharyngeal basket.

Nassula is a genus of unicellular ciliate protists, belonging to the class Nassophorea. Like other members of the class, Nassula possesses a basket-like feeding apparatus (nasse, or cyrtos) made up of cytopharyngeal rods (nematodesmata), which are themselves composed of closely packed microtubules. Nassula use this structure to ingest filamentous cyanobacteria, drawing individual strands of blue-green algae through the cytopharynx and into the body of the cell, where they are digested. As the algae are broken down, they can take on a variety of bright colours, which give Nassula a distinctive, variegated appearance under the microscope.

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