(also sieve tube member)
A sieve element of a type present in angiosperms, a series of which are joined end to end to form sieve tubes, with sieve plates between the elements.
- Other cell types classified as vascular tissue, such as sieve tube elements and companion cells, did not conduct light efficiently in either stems or roots.
- The protoplasts of adjacent sieve tube elements are interconnected through the sieve plates.
- Strands of cytoplasm called plasmodesmata connect the sieve tube element and companion cell.
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