Intracellular Phosphate Sensing in Plants

Phosphorus is a building block in various biomolecules such as nucleic acids,proteins,and phospholipids.It also plays pivotal roles in many metabolic pathways,including photosynthesis and respiration(Bowler et al.,2010).Plants take up phosphorus as inorganic phosphate(Pi),which is limited in most soils,and Pi constraints affect plant growth and development and hence agricultural productivity.To cope with low Pi availability in soil,plants have evolved complex mechanisms to maintain Pi homeostasis at the whole-plant and cellular level,which includes Pi uptake,storage,and redistribution.