Below-ground physiological processes enhancing phosphorus acquisition in plants

A - Papers appearing in refereed journals

Vengavesi, K., Pandey, R., Soumya, P. R., Hawkesford, M. J. and Siddique, K. H. M. 2021. Below-ground physiological processes enhancing phosphorus acquisition in plants. Plant Physiology Reports. 26, pp. 600-613.

AuthorsVengavesi, K., Pandey, R., Soumya, P. R., Hawkesford, M. J. and Siddique, K. H. M.

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.

KeywordsPhosphorus uptake; Carboxylic acids; Phosphatases; Anion transporters; Low molecular weight compounds; Root exudation
Year of Publication2021
JournalPlant Physiology Reports
Journal citation26, pp. 600-613
Digital Object Identifier (DOI)
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeDesigning Future Wheat - WP1 - Increased efficiency and sustainability
Output statusPublished
Publication dates
Online30 Nov 2021
Publication process dates
Accepted16 Oct 2021

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