The walls of cork cells in the bark of trees are impregnated with suberin, and suberin also forms the permeability barrier in primary roots known as the Casparian strip.
Cork cambium produces cork cells, which form exterior to the cork cambium
As cork cells mature, they secrete suberin (a waxy substance) in their cell walls and then die
Cork cells function as a barrier to protect the stem from physical damage and from pathogens ...
Cork cambium also produces cork cells, which accumulate at the cambium's exterior.
Waxy material called suberin deposited in the cell walls of cork cells before they die acts as a barrier against water loss, physical damage, and pathogens.
The older parts of roots are sheathed in layers of dead cork cells impregnated with a waxy, waterproof (and airproof) substance called suberin. This sheath reduces water loss but is as impervious to oxygen and carbon dioxide as it is to water.
At this point, the cork cambium begins to form the periderm, consisting of protective cork cells containing suberin. In roots, the cork cambium originates in the pericycle, a component of the vascular cylinder.
Stilt roots in the Amazon Rainforest support a tree in very soft, wet soil conditions ...
[L. cortex, bark + cambium, exchange]
A cylinder of meristematic tissue in plants that produces ~s to replace the epidermis during secondary growth.
(ko-role-a) [L. dim. of corona, wreath, crown]
Petals, collectively; usually the conspicuously colored flower parts.
suberin A fatty material found in the cell walls of ~s and the Casparian strip of the endodermis.
sublimation The process by which water can move between solid and gaseous states without ever becoming liquid.
sublittoral zone See subtidal zone.
Secondary growth is produced by a cambium. It occurs in rows or ranks of cork, secondary xylem or secondary phloem cells. ~s (produced by a cork cambium) are technically part of the epidermis, and contribute to the bark of woody stems.
Robert Hooke person who‚ in 1665‚ was the first to see and name cells - actually‚ what he first saw was the cell walls that were the remains of formerly-living ~s ...
See also: What is the meaning of Cork, Cells, Plant, Trans, Tissue?