Tissue Respiration and Mitochondrial Oxidative Phosphorylation of NaCl-Treated Pea Seedlings

摘要: The effect of sodium chloride added to root medium pea seedlings on respiratory activity tissue segments and isolated mitochondria was studied. Salinization enhances the respiration leaves about one-third a fresh weight, dry weight or protein basis. Roots stems show only 10 15% stimulation. onset increase in roughly parallels NaCl content decrease growth rate. At later stage elevated is apparent treated plants even though concentration reaches plateau osmotic adjustment being reached. Stimulation found both etiolated green plants. Experiments with DNP that simple uncoupling by salt not involved; control proportionally same.In accordance increased rates observed vivo, from salt-treated higher oxygen uptake several substrates. during long term distinct Since P/O ratios are affected NaCl, potential for oxidative phosphorylation salt-affected appears increase. It postulated this may lead changes ADP ATP content, turn, affect regulation metabolic pathways.