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symplast Line breaks: sym|plast
Pronunciation: /ˈsɪmplast/

Definition of symplast in English:


A continuous network of interconnected plant cell protoplasts.
Example sentences
  • Where access to this space becomes restricted by an exodermal resistance, a greater proportion of the total flux of a material may be absorbed at the root periphery and pass from cell to cell via the symplast.
  • It is possible that a proportion of ammonium fed to maize roots enters the symplast at the endodermis and is incorporated into amino acids within the pericycle which results in it becoming acidotic.
  • Instead, it appears that there is a barrier to movement between the post-phloem symplast and the nucellus.


Example sentences
  • These results suggest that movement of mineral oil in plants is both apoplastic via intercellular spaces and symplastic via plasmodesmata.
  • In these cases sugar contents declined, possibly limiting translocation as in brown rust-infected barley leaves, in which apoplastic and symplastic sugar concentrations were reduced as export declined.
  • It is therefore probable that much of the increase in sugars during sub-zero hardening was symplastic.


1930s: from German Symplast.

Definition of symplast in:
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