Transport in plants

chapter 9

describe the plant cells metabolic demands

• the cells that are underground don’t photosynthesise→ waste products need to be removed and oxygen and glucose need to be provided

• hormones need to be transported to areas where they have an effect

• mineral ions absorbed by roots need to be transported to all cells to make proteins

describe the size of cells in transport systems

• some are very large 

• need very effective systems to move substances up and down the whole plant

describe SA: vol ratio in plant transport systems

• leaves have a large ratio

• whole plant has a small ratio

• cannot rely on diffusion alone to provide cells with everything they need

where are xylem and phloem found

• vascular bundles