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.
4-Botany-Plant-Vascular-Tissue
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Date Modified: 2022.0225