This is an example for facilitated diffusion in plants.

Movement of substances or ions from a region of its high concentration to region of its low concentration through proteins of membrane without using metabolic energy is called facilitated diffusion. Protons are moving from lumen to stroma through a proton channel CF0 down the gradient. Movement of protons from stroma to lumen of thylakoid and from matrix to perimitochondrial space during electron transport is called active transport in which pumps are involved. Phloem loading is also an active process as it is against concentration gradient.