What are sieve tubes explain in detail

Dear Student,

Sieve tubes are a series of end to end connected sieve cells or sieve elements with perforated walls. They help in the translocation of food. 
Sieve tubes are multicellular. The mass flow of solute in plants occurs via a sieve tubes due to which there is a need of efficient multicellular system.

Sieve tube elements are living components of phloem.

They contain the living protoplasm i.e cytoplasm that provides raw material and enzymes for various metabolic activities of the cell rendering it living.

Though, it does not contain nucleus, yet it is considered as living because all the controlling activities of nucleus are taken over by the nucleus of the adjacent Companion cells.

Any cell devoid of nucleus that contains cytoplasm is considered living.

Regards

  • 0
What are you looking for?