LC-MS/MS shotgun proteomics reveals biochemical mechanisms of Paspalum fasciculatum tolerance to Pb-stress

Paspalum fasciculatum Willd. ex FlĂźggĂŠ grows in mining soils which are Cd- and Pb-contaminated where it exhibits tolerance to Pb the ability extract from these soils. To elucidate mechanisms Pb-stress, liquid chromatography with tandem mass spectrometry (LC-MS/MS) was used quantify changes accumulation of proteins leaves. We identified 323 involved primary metabolism response biotic or abiotic stresses. Although processes photosynthesis saccharide energy presented greatest amount down-regulated proteins, plant able maintain photosynthetic functions obtain sustain vital balance. P. based their on increased antioxidant defenses, improving protection repair transduction signals coordinate physiological Pb-stress. Our results provide important information understand could be future molecular studies resistance plants.