companion cell वाक्य
उदाहरण वाक्य
मोबाइल
- The xylem consists of companion cells, function to keep the sieve-tube members alive.
- Each companion cell is derived from the same mother cell as its associated sieve tube member.
- This conduction system is composed of sieve-tube member and companion cells, that are without secondary walls.
- The companion cells, connected to the sieve tubes via plasmodesmata, are responsible for loading the phloem with sugars.
- Sieve cells are typically associated with gymnosperms, because angiosperms have the more derived sieve tube members and companion cells in their phloem.
- Plasmodesmata are also used by cells in phloem, and symplastic transport is used to regulate the sieve-tube cells by the companion cells.
- It is the companion cells that are nestled between sieve-tube members that function in some manner bringing about the conduction of food.
- Phloem consists of two cell types, the nuclei and ribosomes, and their metabolism and functions are regulated by the adjacent nucleate companion cells.
- After several weeks companion cells, which had not been treated, started to use up their allotted number of divisions and eventually the last cell died.
- Each sieve tube element is normally associated with one or more nucleated companion cells, to which they are connected by plasmodesmata ( channels between the cells ).
- 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.
- Mutant plants carrying insertions in AtSWEET11 and-12 are defective in phloem loading, thus revealing a two-step mechanism of SWEET-mediated export from parenchyma cells feeding H +-coupled import into the sieve element-companion cell complex.
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