Phosphate depletion modulates auxin transport in Triticum aestivum leading to altered root branching.

ABSTRACT: Understanding the mechanisms by which nutritional signals impact upon root system architecture is a key facet in the drive for greater nutrient application efficiency in agricultural systems. Cereal plants reduce their rate of lateral root emergence under inorganic phosphate (Pi) shortage; this study uses molecular and pharmacological techniques to dissect this Pi response in Triticum aestivum. Plants were grown in coarse sand washed in high- or low-Pi nutrient solution before being assessed for their root branching density and expression of AUX/IAA and PIN genes. Seedlings were also grown on media containing [(14)C]indole acetic acid to measure basipetal auxin transport. Seedlings grown in low-Pi environments displayed less capacity to transport auxin basipetally from the seminal root ape

SUBMITTER: Talboys PJ 

PROVIDER: S-EPMC4144783 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature