rhizosphere by design spring 2016
TRANSCRIPT
Rhizosphere By Design Quantitative understanding of how root exudates and hairs influence plant-soil interaction
www.hutton.ac.uk/From 1ml Syringe Barrel to Mid Pilmore Cultivation Experiment
Rhizosphere Structure Formation
Mucilage and Root Exudate
Properties
mm
1.3.
4.
5.
Computational Modelling
Muhammad Naveed
Nico KoebernickLaura Cooper
Paul HallettGlyn Bengough
Timothy GeorgeTiina RooseSam KeyesKeith Daly
Ian SinclairLawrie Brown
Annette Raffan
www.scri.ac.uk/research
2.
Rhizosphere by design: breeding to select root traits that physically manipulate soil
Phase 1: How do exudates influence the root-soil interface
Barley (optic) root exudate
0.0092
0.092
0.92 1.84 4.6 mg g-1
Chia seed exudate
0.0092
0.092
0.92 1.84 4.6 9.2 mg g-1
Phase 1: Near completionPhase 2: Glass house experiments about to start
Which root traits drive rhizosphere structure?
High resolution imaging of root:soil interactions
images courtesy Timothy George
Digital image analysis
250 um
root
Rhizosphere By Design -Imaging rhizosphere structure formation
4
Rhizosphere By Design
Future Work• Incorporate changes to physical properties caused by mucilage and
exudate• Combine soil and root models to estimate water and nutrient uptake
Parameters measured from experiments
Equations applied to computational mesh
Water release dynamics
SoilWaterAir
SoilWaterAir
SoilWaterAir
mm