Abstract
Plants develop strategies to recycle phosphorus so that all organs receive adequate amounts, especially new growing organs. As many phosphorus compounds are closely related to carbon metabolism, the expression level of the following enzymes were evaluated by RT-PCR: Triose phosphote translocater, phosphoenolpyruvate/phosphate translocator (PEP/Pi translocator), phosphoenolpyruvate carboxylase, pyruvate kinase, NAD dependent glyceraldehydes 3-phosphate dehydrogenase, NADP dependent glyceraldehydes 3-phosphate dehydrogenase. Under phosphate deficient conditions, the level of inorganic phosphate decreased dramatically. Because the expression level of PEP/Pi translocator increased dramatically, the carbon flow from cytosol to chloroplast as PEP may play an important role in maintaining carbon metabolism under phosphate deficient condition.
