As AQA B root pressure

can anyone help me by explainingthe root pressure theory ? help would be much appreciated

if anyone needs help with history, nazi germany and britain 1899-1914 let me know i'l try my best

Reply 1

Mits

I'll do my best:

As mineral ions are transported into the roots by either active transport or simple diffusion, the water potential in the root cells become more negative than they were before. Therefore, water follows into the root by osmosis(down the water potential gradient as the root cells are now more negative).

This osmotic movement creates a high hydrostatic pressure at the root (due to the increasing volume of water now in the root). The hydrostatic pressure is lower further along the xylem so water can move through the xylem from the root, down the pressure gradient (from high to low hydrostatic pressure).

Hope it makes sense! If it doesn't help, send me a message and i'll try to explain it some other way.