Upon illumination of the chloroplasts, the pH of the stroma rises from 7.0 to 8.0 because of the proton (hydrogen ion, H+ ) gradient created across the thylakoid membrane.
Når grønkornene bliver belyst, stiger pH i stroma fra 7,0 til 8,0 på grund af proton (brintion, H+)-gradienten, der skabes ind gennem tylakoidmembranen.