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A fatty substance found in many plant cell walls, especially cork.



a substance secreted by the cells of integumental plant tissues; it infiltrates the cell walls, resulting in their suberi-zation. Chemically, suberin is a glyceride of phellonic acid, CH3(CH2)19CH(OH)COOH, and suberic acid, COOH(CH2)6-COOH. It is closely related to cutin, but is much less common.

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stelligerum, Eichhornia azurea, and Oxycaryum cubense were not observed Casparian bands. In Sagittaria montevidensis and Pontederia cordata, these grooves are less evident and, in the young roots of Echinodorus grandiflorus, very evident.
A survey of angiosperm species to detect hypodermal casparian bands. I.
The cortex displays an exodermis with Casparian bands (Figures 18-19), followed by the cortical parenchyma consisting of isodiametric cells.
The outer layer of PMR has suberin lamellae (Figures 2(b), 2(c), 2(e), and 2(g)) without Casparian bands (Figures 2(a) and 2(b)).

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