companion cell meaning in Hindi

Examples

1. The xylem consists of companion cells, function to keep the sieve-tube members alive.
2. Each companion cell is derived from the same mother cell as its associated sieve tube member.
3. This conduction system is composed of sieve-tube member and companion cells, that are without secondary walls.
4. The companion cells, connected to the sieve tubes via plasmodesmata, are responsible for loading the phloem with sugars.
5. Sieve cells are typically associated with gymnosperms, because angiosperms have the more derived sieve tube members and companion cells in their phloem.
6. Plasmodesmata are also used by cells in phloem, and symplastic transport is used to regulate the sieve-tube cells by the companion cells.
7. It is the companion cells that are nestled between sieve-tube members that function in some manner bringing about the conduction of food.
8. Phloem consists of two cell types, the nuclei and ribosomes, and their metabolism and functions are regulated by the adjacent nucleate companion cells.
9. 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.
10. 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 ).