One of the studies on the tobacco mosaic virus (TMV) contributed to the characterization of the P-protein, a common cell component in the sieve element of dicotyledons.
When the bodies are formed, the sieve element is still an immature but complete cell containing a nucleus and other organelles and having a vacuole that is delimited by a tonoplast membrane.
The virus may appear close to the cell walls of the sieve element, located between the cisternae of the stacked endoplasmic reticulum, or may be found in the P-protein-containing pores of the sieve plates.
Fixation of images of sieve element plastids in Beta.
A crystaline inclusion in sieve element nuclei of Amsinckia II.
callose: a carbohydrate found as a common cell wall constituent in sieve areas of a sieve element.
definitive callose: usually massive deposits in sieve elements at cessation or interruption of translocation in the sieve element.