Herbicide Resistance, Photosystem II, psbA G ene, Photosynthesis, Chloroplast, Phalaris para doxa Triazine resistance in a mutant biotype of Phalaris paradoxa is accompanied by changes in the chlorophyll fluorescence induction curve, and by reduced quantum yield for electron transport, indicating altered photosystem II activity. H owever, light-saturated rates of electron transport in isolated...