| 释义 |
Definition of sieve element in English: sieve elementnoun Botany An elongated cell in the phloem of a vascular plant, in which the primary wall is perforated by pores through which water is conducted. Example sentencesExamples - In fact, in several species, sucrose transporters have been identified as essential for phloem loading into sieve elements, the phloem-specific photoassimilate-transporting cells.
- The host sieve elements of the phloem are lined by haustorial transfer cells of the parasite, which then allow unloading of host phloem solutes into the parasite haustorium.
- On reaching individual sieve elements of the phloem the terminal hyphae cells differentiate into ‘absorbing hyphae’ which produce finger-like protrusions that surround the sieve element.
- Little is known about the genetic control of cell type identity leading to the differentiation of vessels, fibres, axial parenchyma cells, sieve elements, or companion cells.
- In general, rays are regarded as being necessary for the distribution of assimilates and nutrients in a lateral direction between the sieve elements and xylem across the cambial cell layer.
Definition of sieve element in US English: sieve elementnoun Botany An elongated cell in the phloem of a vascular plant, in which the primary wall is perforated by pores through which water is conducted. Example sentencesExamples - On reaching individual sieve elements of the phloem the terminal hyphae cells differentiate into ‘absorbing hyphae’ which produce finger-like protrusions that surround the sieve element.
- In fact, in several species, sucrose transporters have been identified as essential for phloem loading into sieve elements, the phloem-specific photoassimilate-transporting cells.
- The host sieve elements of the phloem are lined by haustorial transfer cells of the parasite, which then allow unloading of host phloem solutes into the parasite haustorium.
- In general, rays are regarded as being necessary for the distribution of assimilates and nutrients in a lateral direction between the sieve elements and xylem across the cambial cell layer.
- Little is known about the genetic control of cell type identity leading to the differentiation of vessels, fibres, axial parenchyma cells, sieve elements, or companion cells.
|