sieve tube members造句

• They have a narrower diameter and are more elongated compared to sieve tube members.
• Each companion cell is derived from the same mother cell as its associated sieve tube member.
• Sieve cells are typically associated with gymnosperms, because angiosperms have the more derived sieve tube members and companion cells in their phloem.
• The ends of these cells are connected with other sieve tube members, and together they constitute the "'sieve tube " '.
• At the interface between two sieve tube members in angiosperms are "'sieve plates "', pores in the plant cell walls that facilitate transport of materials between them.
• Sieve tube members have no cell nucleus, ribosomes, or leaves, companion cells help move the sugar that is produced by photosynthesis from the mesophyll tissue into the sieve tube elements.
• In plant anatomy, "'sieve tube elements "', also called "'sieve tube members "', are a specialised type of elongated cell in the phloem tissue of flowering plants.