Plants need water to grow and maintaining the turgidity of cell. There are three types of transport occur in plants: Diffusion, facilitated diffusion and active transport.
Water is the most abundant constituent of all physiologically active plant cells. Several physiological processes of plants like osmosis, imbibition, plasmolysis are accomplished by water.
Transpiration explains how water moves up the plant against gravity in tubes via a xylem. Plants pump the water up from the soil to deliver nutrients to their leaves. It is influenced by several factors.
Opening and closing of stomata is controlled by concentration of solutes in guard cells. Some factors like light, temperature, CO2, O2,hormones regulate the opening and closing of stomata.
Diffusion is the movement of particles from the region of higher concentration to the region of lower concentration. It is affected by temperature, pressure, density of medium, distance,number of particles per unit volume.
Minerals are move into the roots by using energy in the form of ATP. After the uptake minerals are transported to all parts by transpiration pull. Later they are absorbed by active or passive transport.
Food is synthesized through the process of photosynthesis. It can be transported to different parts of the plant, this function is performed by phloem.
Water transport is important for the uptake of mineral nutrients from the soil. There are three pathways which facilitate the movement of water in plants like apoplast, symplast, trans-membrane pathways.
Mass flow hypothesis states that the mass flow of solute take place from the source(mesophyll cells) to the sink (where photosynthesis needed). This theory was proposed by Ernst Munch.