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Symplast
Water moves across cortex via cytoplasm and plasmodesmata.
Apoplast
Water can also seep into cell walls and intercellular spaces.
Casparian strip
Structure at the endodermis that blocks apoplast, forcing all water to move by symplast.
Pericycle
Layer that pumps ions into xylem, lowering water potential (WP) of xylem.
Osmosis in xylem
Water enters xylem by osmosis due to lowered WP.