英语词汇“sieve cell”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

sieve cell

noun Botany

A sieve element of a primitive type present in ferns and gymnosperms, with narrow pores and no sieve plate.Vessel elements, tracheids, fibres, sieve tube elements, sieve cells, and parenchyma cells are the major components of vascular tissue....

When coupled with a thick layer of cuticle or bark, the self-sealing mechanisms of sieve cells apparently protect phloem sap from most herbivores.
Sieve tube members occur in angiosperms, while sieve cells are found in other vascular plants.

单词	sieve cell
释义	sieve cell noun Botany A sieve element of a primitive type present in ferns and gymnosperms, with narrow pores and no sieve plate.Vessel elements, tracheids, fibres, sieve tube elements, sieve cells, and parenchyma cells are the major components of vascular tissue.... When coupled with a thick layer of cuticle or bark, the self-sealing mechanisms of sieve cells apparently protect phloem sap from most herbivores. Sieve tube members occur in angiosperms, while sieve cells are found in other vascular plants.
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