Influence of maize root mucilage on soil aggregate stability

  title={Influence of maize root mucilage on soil aggregate stability},
  author={Jean-louis Morel and Leila Habib and Sylvain Plantureux and Armand Guckert},
  journal={Plant and Soil},
This study was undertaken to determine the effects of root exudates on soil aggregate stability. Root mucilage was collected from two-month old maize plants (Zea mays L.) Mucilage and glucose solutions were added at a rate of 2.45 g C kg−1 dry soil to silty clay and silt loam soils. Amended soils, placed in serum flasks, were incubated for 42 d with a drying-wetting cycle after 21 d. Evolved CO2 was measured periodically as well as the water-stable aggregates and soluble sugar and… 
Interplay between soil drying and root exudation in rhizosheath development
Background and AimsWetting-drying cycles are important environmental processes known to enhance aggregation. However, very little attention has been given to drying as a process that transports
Wetting and drying cycles in the maize rhizosphere under controlled conditions. Mechanics of the root-adhering soil
The mechanical properties of the silty topsoil adhering to the maize roots are attributed to both physical and biological interactions occurring in the maize rhizosphere.
Plant exudates may stabilize or weaken soil depending on species, origin and time
It is hypothesized that plant exudates could either gel or disperse soil depending on their chemical characteristics, and barley root exudation might therefore disperse soil and this could facilitate nutrient release.
Effects of root exudates of woody species on the soil anti-erodibility in the rhizosphere in a karst region, China
The causal relationships between the root exudates and the AES are quantified using modeling experiments in laboratory and field observations and indicated the interspecific variation of the AES and organic matter of the rootExudates.
Mucilage from fruits/seeds of chia (Salvia hispanica L.) improves soil aggregate stability
Background and aimsMyxodiaspores have been shown to enhance soil-seed contact and improve soil stability. We aim to demonstrate the effect of myxodiaspory on the stability of soil aggregates and gain
Plant exudates improve the mechanical conditions for root penetration through compacted soils
Root growth modelled on PR data suggested plant exudates significantly eased root elongation in soil, and compression characteristics of soils were improved, easing penetration and enhancing recovery of root induced soil compaction.
Plasticity of rhizosphere hydraulic properties as a key for efficient utilization of scarce resources.
This work proposes a dualism in rhizosphere properties, which may be a strategy for plants to control which part of the root system will have a facilitated access to water and which roots will be disconnected from the soil, for instance by air-filled gaps or by rhizospheric hydrophobicity.
Physical properties of a sandy soil as affected by incubation with a synthetic root exudate: Strength, thermal and hydraulic conductivity, and evaporation
The effects of incubating a sandy soil with a synthetic root exudate (SRE) on soil physical properties and evaporation are examined and analysis of X‐ray computed tomography (CT) scanning showed that the SRE‐treated samples had a greater proportion of small pores (<60 μm).
Roots regulate ion transport in the rhizosphere to counteract reduced mobility in dry soil
Diffusion of ions in the soil depends on soil moisture content. In a dry soil, transport of nutrients towards the root and the concomitant uptake could be reduced. However, pot and field experiments


Aggregate stability of a silt loam soil as affected by roots of corn, soybeans and wheat
Abstract A greenhouse experiment was conducted to investigate the effect of root growth and exudation of 3 crop species on soil aggregation. Two plant populations for each of 3 crops (corn, soybeans,
The results suggest that the growth and activities of living roots may be a major factor controlling the overall direction and magnitude of changes in aggregate stability under arable or ley crops.
Relationship between the decreases in soil stability effected by the growth of maize roots and changes in organically bound iron and aluminium
Summary The growth of maize roots decreased fresh soil aggregate stability. Chemical pretreatment with sodium periodate (to assess the importance of polysaccharides) and acetylacetone (to assess
Organic matter and water‐stable aggregates in soils
Summary The water-stability of aggregates in many soils is shown to depend on organic materials. The organic binding agents have been classified into (a) transient, mainly polysaccharides, (b),
Interactions between soil drying due to plant water use and decreases in aggregate stability caused by maize roots
Summary In a sandy loam soil the stability of freshly sampled aggregates, determined by turbidimetry, showed a net decrease following the growth of maize that was partly offset when the plants
The rhizosphere in Zea: new insight into its structure and development
Some of the nodal roots of field-grown Zea mays L. bear a persistent soil sheath along their entire length underground except for a glistening white soil-free zone which extends approximately 25 mm
Comparison of the adsorption of maize root mucilage and polygalacturonic acid on montmorillonite homoionic to divalent lead and cadmium
SummaryRoot mucilage material (RM) was isolated from maize plants grown in the field, and its affinity to montmorillonite (M) homoionic to Pb2+ and Cd2+ was compared with that of a commercial
Measurement of Pb2+, Cu2+ and Cd2+ binding with mucilage exudates from maize (Zea mays L.) roots
Results show that root mucilages are able to bind metals, and the importance of the binding depends on the nature of the cation, following the order Pb > Cu > Cd.
Stabilization of Soil Aggregates by the Root Systems of Ryegrass
The root system of ryegrass was more efficient than that of white clover in stabilizing aggregates of Lemnos loam because ryegrass supported a larger population of vesicular-arbuscular mycorrhizal
The legume Rhizosphere
After inoculation with an effective Rhizobium strain, rhizobia were found aggregated in a definite zone adjacent to the root surface when either living roots were examined by phase microscopy or thin sections by electron microscopy.