One of the mysteries of the English language finally explained.
A sieve element of a primitive type present in ferns and gymnosperms, with narrow pores and no sieve plate.
- ‘Sieve tubes and sieve cells both lose their nuclei when they become functional as conduits for photosynthates.’
- ‘These are the sieve cells, through which the nutrients are transported, and the companion cells.’
- ‘When coupled with a thick layer of cuticle or bark, the self-sealing mechanisms of sieve cells apparently protect phloem sap from most herbivores.’
- ‘Vessel elements, tracheids, fibres, sieve tube elements, sieve cells, and parenchyma cells are the major components of vascular tissue.’
- ‘Sieve tube members occur in angiosperms, while sieve cells are found in other vascular plants.’
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