Below-ground physiological processes enhancing phosphorus acquisition in plants

Phosphorus (P) is an essential element for crop growth and development. In acid soils, inorganic P (Pi) is immobilised with Fe3+ and Al3+, whereas in calcareous soils, it is fixed with Ca2+. Therefore, P nutrition is not constrained by soil P content per se but by its bioavailability to plants. The large amounts of P fertiliser applied to agricultural land to increase crop P availability can cause eutrophication of non-flowing water bodies. Being a non-renewable resource, P reserves are becoming depleted. Soil P mobilisation is governed by multiple adaptations at the physiological and molecular levels. Below-ground physiological processes including favourable root architecture and morphology, and release of carboxylates, protons and root secretory phosphohydrolases result in significant modification of the rhizosphere microenvironment thereby enhancing P acquisition. Beneficial soil microorganisms work in tandem with plants to mobilise bioavailable soil P. Phosphorus acquisition through rhizosphere modifications is an exciting area of research for plant nutritionists.

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  • Name: Vengavasi, Krishnapriya, Type: Corresponding Author,
  • Name: Pandey, Renu, Type: Author,
  • Name: Soumya, P. R., Type: Author,
  • Name: Hawkesford, Malcolm J., Type: Author,
  • Name: Siddique, Kadambot H. M., Type: Author,
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DFW Organisation RRes
DFW Work Package 1
DOI 10.1007/s40502-021-00627-8
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