Arabidopsis phosphatase under-producer mutants pup1 and pup3 contain mutations in the AtPAP10 and AtPAP26 genes

Researchers have long hypothesized that Pi starvation-induced APases are involved in internal Pi recycling and remobilization as well as in external Pi utilization. Two phosphatase under-producer ( pup ) mutants, pup1 and pup3 , were previously isolated in Arabidopsis .

Characterization of these 2 pup mutants provided the first genetic evidence for the above hypothesis. To date, however, the molecular lesions in these 2 pup mutants remain unknown. In this work, we demonstrate that pup1 and pup3 contain point mutations in the Arabidopsis purple acid phosphatase gene AtPAP10 and AtPAP26 , respectively.