Molecules are moved within plants by transport processes that operate at a variety of spatial scales. Subcellular transport of ions, electrons and molecules such as water and enzymes occurs across cell membranes. Minerals and water are transported from roots to other parts of the plant in the transpiration stream. Diffusion, osmosis, and active transport and mass flow are all different ways transport can occur. Examples of elements that plants need to transport are nitrogen, phosphorus, potassium, calcium, magnesium, and sulphur. In vascular plants, these elements are extracted from the soil as soluble ions by the roots and transported throughout the plant in the xylem. Most of the elements required for plant nutrition come from the chemical breakdown of soil minerals. Sucrose produced by photosynthesis is transported from the leaves to other parts of the plant in the phloem and plant hormones are transported by a variety of processes. COUNT 5
QSN1 How is water transported into plants? ANS1 from roots QSN2 IN what form are mineral acquired by the roots? ANS2 as soluble ions QSN3 From where does the plant get the required minerals? ANS3 chemical breakdown of soil QSN4 Where is sucrose produced in a plant? ANS4 the leaves QSN5 How are hormones moved around a plant? ANS5 by a variety of processes