from The Century Dictionary and Cyclopedia

  • n. In botany, same as sievecell.


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  • First sieve-tube cells are short-lived and do not have companion cells.

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  • Water flow sieve-tube boundary - estimating turgor implications phloem loading unloading.

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  • Companion Cells 1) Companion cells are closely connected to sieve-tube cells by numerous plasmodesmata.

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  • Phloem is vascular tissue that conducts the organic solutes in plants, from the leaves to the roots; it contains sieve-tube members and companion cells. a. Sieve-tube Members 1) Sieve-tube cells contain cytoplasm but no nucleus.

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