Combining spring wheat genotypes with contrasting root architectures for a better use of water resources in soil? Evidence from column-scale water stable isotopic experiments
Controlled experiments demonstrate the impact of genotype mixtures on root water uptake in varying water conditions, indicating potential benefits.
Key Points
The shallow-rooted genotype showed better root water uptake in topsoil, while the deep-rooted genotype excelled in subsoil.
Under water deficit, all plant modalities increased their relative water uptake from subsoil and slightly from topsoil, improving water use efficiency.
The genotype mixture facilitated complementary root water uptake distribution despite shifting contributions towards subsoil during water deficit conditions.
This study reveals critical insights into root water uptake plasticity influenced by root architectures and soil moisture availability.