Photosynthesis is differently regulated during and after copper‐induced nutritional stress in citrus trees

• DOI: 10.1111/ppl.12746
• Publication Date: 2018-04-18T04:41:41Z
• Authors: Franz W.R. Hippler; Veronica L. Dovis; Rodrigo M. Boaretto; Jose A. Quaggio; Ricardo A. Azevedo; Lorraine E. Williams; Dirceu Mattos-Jr
• Keywords: Vegetative reproduction; Photosynthetic capacity

Antioxidant enzymatic responses in citrus leaves under Cu‐induced stress depend on rootstock genotypes. However, there is a lack of information about how woody plants recover growth capacity after exposure to elevated Cu and if affected by the redistribution metal new vegetative parts consequently whether photosynthesis affected. Therefore, biomass concentrations leaf flushes were determined young trees grafted onto contrasting rootstocks [Swingle citrumelo (SW) Rangpur lime (RL)]. Photosynthetic rate, chlorophyll fluorescence antioxidant systems evaluated previously grown nutrient solution with varying from low high levels no added Cu. Both exhibited reduced plant toxicity. RL better recovery excess, which was dependent modulation enzyme activities roots that maintained integrity photosynthetic apparatus. In contrast, SW lower rate at lowest available concentration. Although highest accumulation occurred roots, proportional concentration roots.