Response ofLeucaena leucocephala to vesicular-arbuscular mycorrhizal colonization and rock phosphate fertilization in an Oxisol

1989 ◽  
Vol 114 (1) ◽  
pp. 127-133 ◽  
Author(s):  
A. Manjunath ◽  
N. V. Hue ◽  
M. Habte
Keyword(s):  
Rock Phosphate ◽  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Colonization ◽  
Arbuscular Mycorrhizal Colonization ◽  
Vesicular Arbuscular ◽  
Phosphate Fertilization

Mycorrhizal responsiveness of Thuja, Calocedrus, Sequoia, and Sequoiadendron species of western North America

1985 ◽  
Vol 15 (6) ◽  
pp. 1049-1054 ◽  
Author(s):  
J. L. Kough ◽  
Randy Molina ◽  
R. G. Linderman
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Tree Species ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Colonization ◽  
Growth Enhancement ◽  
Vesicular Arbuscular Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal Colonization ◽  
Vesicular Arbuscular ◽  
Low Phosphorus

Four western conifers inoculated or not inoculated with three species of vesicular–arbuscular mycorrhizal fungi were grown in pasteurized soil and maintained at 11 or 43 ppm phosphorus. Compared with controls, vesicular–arbuscular mycorrhizal colonization increased biomass more of younger than older seedlings. In young seedlings, species with large seeds responded less to phosphate addition or vesicular–arbuscular mycorrhizal colonization than smaller seeded species. Vesicular–arbuscular mycorrhizal seedlings with low phosphorus were always larger than noninoculated low phosphorus controls and comparable in size or larger than nonmycorrhizal controls at moderate phosphorus. Vesicular–arbuscular mycorrhizal plants produced from 100 to 2000% more biomass than noninoculated plants at low phosphorus, and from equality to 500% at moderate phosphorus. Vesicular–arbuscular mycorrhizal fungal species did not differ in plant growth enhancement or root colonization at any seedling age or phosphorus fertility examined. Tree species' responsiveness ranged as follows: Thujaplicata > Sequoiasempervirens > Calocedrusdecurrens > Sequoiadendrongiganteum. Vesicular–arbuscular mycorrhizal fungi enhanced seedling uniformity and size in all the tree species.

Mycorrhizae of alpine fell-field communities on soils derived from crystalline and calcareous parent materials

1986 ◽  
Vol 64 (8) ◽  
pp. 1691-1697 ◽  
Author(s):  
Peter Lesica ◽  
Robert K. Antibus
Keyword(s):  
Root Colonization ◽  
Phosphorus Deficiency ◽  
Calcareous Soils ◽  
Canopy Cover ◽  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Colonization ◽  
Parent Materials ◽  
Mycorrhizal Root ◽  
Arbuscular Mycorrhizal Colonization ◽  
Vesicular Arbuscular

The degree of vesicular–arbuscular mycorrhizal root colonization of alpine fell-field plants was measured at six sites in the northern Rocky Mountains of Montana and Wyoming. Soils derived from calcareous or acidic crystalline parent materials were analyzed for chemical and physical properties and vesicular–arbuscular mycorrhizal fungal propagule density. Soils associated with calcareous parent materials had finer texture, higher pH, and higher levels of calcium, sodium, and silicon. Viable vesicular–arbuscular mycorrhizal propagule density was positively correlated with plant canopy cover. Typical vesicular–arbuscular mycorrhizal colonization occurred in 84% of the species examined. Vesicular–arbuscular mycorrhizal root colonization was significantly greater on soils derived from calcareous parent materials. Alkaline pH and high levels of calcium associated with calcareous soils may result in these soils being functionally more phosphorus deficient than are crystalline soils. Phosphorus deficiency may partially explain the higher levels of vesicular–arbuscular mycorrhizal colonization observed.

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