What is the difference, in morphology and taxonomic group where found, between a sieve cell and

step 1 So here we're going to be taking a look at a couple different types of cells that we can find in

What is the difference, in morphology and taxonomic group...

Key Concepts

Phloem

Phloem is a complex tissue in vascular plants responsible for the transport of sugars and other organic compounds from photosynthetic regions to non?photosynthetic parts. It is composed of living cells that are highly modified to facilitate long-distance transport and communication within the plant.

Sieve Cells

Sieve cells are a type of phloem element typically found in non-angiosperm plants such as gymnosperms and ferns. They are elongated cells with numerous plasmodesmatal connections and simpler wall modifications compared to their angiosperm counterparts, lacking specialized companion cells and distinct sieve plates.

Sieve Tube Members

Sieve tube members are specialized phloem cells found predominantly in angiosperms. They are arranged end-to-end to form sieve tubes and are characterized by the presence of sieve plates at their connecting end walls. Unlike sieve cells, sieve tube members are closely associated with companion cells that assist in the regulation of their functions and overall phloem transport.

Vascular Plant Taxonomy

Vascular plant taxonomy distinguishes major groups such as gymnosperms, ferns, and angiosperms, which show differences in phloem morphology. Sieve cells are typically associated with non-angiosperm groups like gymnosperms and ferns, whereas sieve tube members are a characteristic adaptation of angiosperms, reflecting the evolutionary divergence in phloem structure.

Transcript

Please give Ace some feedback