Function of the Golgi-located phosphate transporter PHT4;6 is critical for senescence-associated processes in Arabidopsis.

ABSTRACT: The phosphate transporter PHT4;6 locates to the trans-Golgi compartment, and its impaired activity causes altered intracellular phosphate compartmentation, leading to low cytosolic Pi levels, a blockage of Golgi-related processes such as protein glycosylation and hemicellulose biosynthesis, and a dwarf phenotype. However, it was unclear whether altered Pi homeostasis in pht4;6 mutants causes further cellular problems, typically associated with limited phosphate availability. Here we report that pht4;6 mutants exhibit a markedly increased disposition to induce dark-induced senescence. In control experiments, in which pht4;6 mutants and wild-type plants developed similarly, we confirmed that accelerated dark-induced senescence in mutants is not a 'pleiotropic' process associated with the dwa

SUBMITTER: Hassler S 

PROVIDER: S-EPMC4973741 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature