Phosphate nutrition: Improving low-phosphate tolerance in crops

Damar Lizbeth López-Arredondo, Marco Antonio Leyva-González, Sandra Isabel González-Morales, José López-Bucio, Luis Herrera-Estrella

Research output: Contribution to journalReview article

263 Scopus citations

Abstract

Phosphorus is an essential nutrient that is required for all major developmental processes and reproduction in plants. It is also a major constituent of the fertilizers required to sustain high-yield agriculture. Levels of phosphate - the only form of phosphorus that can be assimilated by plants - are suboptimal in most natural and agricultural ecosystems, and when phosphate is applied as fertilizer in soils, it is rapidly immobilized owing to fixation and microbial activity. Thus, cultivated plants use only approximately 20-30% of the applied phosphate, and the rest is lost, eventually causing water eutrophication. Recent advances in the understanding of mechanisms by which wild and cultivated species adapt to low-phosphate stress and the implementation of alternative bacterial pathways for phosphorus metabolism have started to allow the design of more effective breeding and genetic engineering strategies to produce highly phosphate-efficient crops, optimize fertilizer use, and reach agricultural sustainability with a lower environmental cost. In this review, we outline the current advances in research on the complex network of plant responses to low-phosphorus stress and discuss some strategies used to manipulate genes involved in phosphate uptake, remobilization, and metabolism to develop low-phosphate-tolerant crops, which could help in designing more efficient crops.

Original languageEnglish
Pages (from-to)95-123
Number of pages29
JournalAnnual Review of Plant Biology
Volume65
DOIs
StatePublished - Apr 2014

Keywords

  • crop plants
  • phosphate acquisition efficiency
  • phosphate transporters
  • phosphate utilization efficiency
  • phosphorus
  • phosphorus starvation response
  • root architecture

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