BIOLOGY - TRANSPORT IN PLANTS

Tops of leaves, rectangular, lots of chloroplasts

Carry water and mineral salts, only moves one way (upwards), dead xylem form xylem tissue

Carry dissolved sugars and amino acids, flow in both directions

Uptake and release of water and solutes by individual cells - absorption of water and minerals from the soil by root cells, control of water and ion movement across the endodermis and pericycle of the root

Short distance transport of substances from cell to cell - transport of water and ions across root cortex and into xylem vessels. Loading of sucrose from photosynthetic cells into sieve tubes of phloem

Long-distance transport of sap within Xylem and Phloem - transport of water and ions through xylem to the rest of the plant. Transport of the products of photosynthesis from source to sink in phloem

Tissue that transports water and ions from the roots to the rest of the plant

Transport water and and minerals from the roots to other parts of a plant

Provide strength to tissue

Thin walled, living cells that act as packing tissue between xylem vessels

Holes in walls where water leaves and enters the xylem

Tissue that transports organic molecules to the tissues of a plant

Contain little cytoplasm with few or no organelles. Unlike xylem the cell walls are made of cellulose

Accompany sieve tube cells and provide the support needed to keep them alive. Companion cells are also involved in transport of substances into and out of sieve tubes. Contain numerous mitochondria, rough ER and a large dense nucleus. Mitochondria needed for ATP for active transport.

Contain both xylem and phloem together with cambium and other cells

Meristemic tissue: cells can keep on dividing by mitosis. Cells then differentiate to form the other cells found in vascular bundle