Stabilization of soil aggregates by the root systems of ryegrass

Soil Research ◽  
1979 ◽  
Vol 17 (3) ◽  
pp. 429 ◽  
Author(s):  
JM Tisdall ◽  
JM Oades
Keyword(s):  
Root System ◽  
Electron Micrographs ◽  
White Clover ◽  
Soil Aggregates ◽  
Amorphous Material ◽  
Arbuscular Mycorrhizal ◽  
Root Systems ◽  
Clay Particles ◽  
Vesicular Arbuscular ◽  
Mycorrhizal Hyphae

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 hyphae in the soil. Electron micrographs show that the hyphae were covered with a layer of amorphous material, probably polysaccharide, to which clay particles appear firmly attached.

Fungal hyphae and structural stability of soil

Soil Research ◽  
1991 ◽  
Vol 29 (6) ◽  
pp. 729 ◽  
Author(s):  
JM Tisdall
Keyword(s):  
Structural Stability ◽  
Arbuscular Mycorrhizal ◽  
Extracellular Polysaccharides ◽  
Future Research ◽  
Clay Particles ◽  
Vesicular Arbuscular ◽  
Fungal Hyphae ◽  
Mycorrhizal Hyphae

This review describes the possible mechanisms by which fungal hyphae, especially those of vesicular-arbuscular mycorrhizal (VA) fungi, bind microaggregates of soil (<0.25 mm diameter) into stable macroaggregates (>0.25 mm), and suggests a model of the formation of a stable macroaggregate by fungal hyphae. Factors which affect the growth of VA mycorrhizal hyphae in soil and their production of extracellular polysaccharides are discussed in relation to stable macroaggregates. The interactions between clay particles and hyphae are described. The review suggests areas of future research on stabilization of aggregates by VA mycorrhizal hyphae.

Association of Vesicular-Arbuscular Mycorrhizal Hyphae with Soil Organic Particles

Ecology ◽  
1983 ◽  
Vol 64 (4) ◽  
pp. 957-959 ◽  
Author(s):  
T. V. St. John ◽  
D. C. Coleman ◽  
C. P. P. Reid
Keyword(s):  
Arbuscular Mycorrhizal ◽  
Vesicular Arbuscular ◽  
Organic Particles ◽  
Mycorrhizal Hyphae
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