Plant tissues {plant tissue} include conductive tissue, epidermis, fundamental tissue, and meristem.
Plant tissue {conductive tissue} can be xylem or phloem.
Conductive plant tissue {xylem}| can conduct water and salts.
Long thin xylem cells {tracheid} join end to end to make long open cellulose tubes, which can thicken by lignin secretion.
Conductive plant tissue {phloem}| can conduct organic nutrients.
Phloem cells join end-to-end using perforated plates, making tubes {sieve tube} outside cambium.
Cells {companion cell} near sieve tubes regulate sieve tubes.
In leaf and flower soft parts, stem pith, and root cortex, plant tissue {fundamental plant tissue} can produce and store food.
Fundamental tissue {chlorenchyma} can have cells with chloroplasts and large vacuoles.
Fundamental tissue {collenchyma} can have cells, under epidermis, with thick walls at corners for support.
Fundamental tissue {sclerenchyma} can have cells, under epidermis, with thick walls for support.
Plant tissue {meristem}| can have apical meristem and cambium.
Meristem {apical meristem} can be at root and stem tips.
Meristem {cambium, plant tissue}| can be in root and stem layers.
Plant tissue {protective tissue} can have cells with thick cell walls.
Protective tissue {epidermis, plant tissue} can be on upper and lower leaf surfaces.
Protective tissue {cork, plant} can be in stems and roots.
Epidermis secretes waxy substances {cutin}| that reduce water loss.
Cork secretes chemicals {suberin}, which prevent water from entering cells and cause cells to die, leaving cell walls to provide structure.
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Date Modified: 2022.0225