Sieve elements are specialized cells that are important for the function of phloem, which is a highly organized tissue that transports organic compounds made during photosynthesis. Sieve elements are the major conducting cells in phloem.
Similarly one may ask, what are sieve plates?
Definition of sieve plate
: a perforated wall or part of a wall at the end of one of the individual cells making up a sieve tube.
Correspondingly, what do sieve tube plates do?
sieve tube, in flowering plants, elongated living cells (sieve-tube elements) of the phloem, the nuclei of which have fragmented and disappeared and the transverse end walls of which are pierced by sievelike groups of pores (sieve plates). They are the conduits of food (mostly sugar) transport.
What is a sieve plate in plant anatomy?
Sieve plates are the connection sites between sieve elements. During early development of young sieve tubes, sieve plates resemble normal cell walls. As in other cell walls, plasmodesmata connect the cytoplast of adjacent sieve elements.
What is another term for sieve plate?
bast phloem vascular tissue sieve tube.
What is the function of sieve tube cells and how are they designed to carry out their functions?
The main functions of sieve tube members include maintaining cells and transporting necessary molecules with the help of companion cells. The sieve tube members are living cells (which do not contain a nucleus) that are responsible for transporting carbohydrates throughout the plant.
What is the function of sieve tubes and companion cells?
Sieve tubes members do not have ribosomes or a nucleus and thus need companion cells to help them function as transport molecules. … It is the companion cells that helps transport carbohydrates from outside the cells into the sieve tube elements. The companion cells also allow for bidirectional flow.
What is the function of sieve tubes Class 9?
Sieve tubes are elements of phloem. They are slender, tube-like structures composed of elongated thin-walled cells, placed end to end. The main function of sieve tubes is to transport sugars and nutrients up and down the plant.
Where in the plant will you find the sieve plates?
Sieve plates have larger pores than other sieve areas in the cell and are generally found on the end walls of sieve tube elements, where the individual cells are joined together to form a longitudinal series called a sieve tube.
Why do plants need sieve plates?
These thin plates, which separate neighboring phloem cells, are perforated by a large number of tiny sieve pores and are believed to play a crucial role in protecting the phloem sap from intruding animals by blocking flow when the phloem cell is damaged.