*companion cell* a type of cell found within the phloem [1] of flowering plants.
Download Companion Cells Gif. Companion cells modified parenchyma, linked to sieve cells by plasmodesmata. Each companion cell is usually closely associated with a sieve element 2.
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Companion cells secondary article sylvie lalonde, zentrum für molekularbiologie der pflanzen, university of tübingen, germany vincent r franceschi, washington state university, pullman, washington, usa wolf b frommer, zentrum für molekularbiologie der pflanzen. Companion cell — noun : Each companion cell is usually closely associated with a sieve element 2.
To check the activity of the adjacent sieve element and participates in loading and unloading of the sugar into the sieve element.
Companion cells in the veins of leaves function in the transfer of assimilates from photosynthetic tissues and bundle sheaths into the sieve tubes. Features these companion cells carry, sieve tube. Y do sieve tube elements need companion cells? 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.