Phosphorus and the formation of vesicular-arbuscular mycorrhizas

D. A. Jasper, A. D. Robson, L. K. Abbott

Research output: Contribution to journalArticle

136 Citations (Scopus)

Abstract

Infection of ryegrass roots by vesicular-arbuscular mycorrhizal (v.a.m.) endophytes occurring in an unfertilized virgin soil of low P status was more sensitive to increasing P supply than that by endophytes occurring in an adjacent fertilized agricultural soil. P application to soil depressed mycorrhiza formation in subterranean clover by increasing plant P status and not by direct effects of soil P on v.a.m. endophytes. Localized placements of superphosphate by banding or topdressing did not affect the development of mycorrhizas of roots in the fertilized zones differently from those of roots not in fertilized zones. The amount of infection was not correlated with P concentrations within the plant at harvest. However, the extent of infection could be correlated with P concentrations of roots at early stages of penetration by the fungi. Additionally, the effects of P supply on frequency of penetration by hyphae and subsequent mycorrhiza development closely paralleled effects of P supply on soluble carbohydrate concentrations in roots.

Original languageEnglish
Pages (from-to)501-505
Number of pages5
JournalSoil Biology and Biochemistry
Volume11
Issue number5
DOIs
Publication statusPublished - 1979

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vesicular arbuscular mycorrhizae
Endophytes
endophytes
mycorrhizae
Phosphorus
Soil
endophyte
Mycorrhizae
phosphorus
infection
virgin soils
mycorrhiza
top dressings
Trifolium subterraneum
Infection
superphosphate
agricultural soils
Lolium
soil treatment
Medicago

Cite this

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title = "Phosphorus and the formation of vesicular-arbuscular mycorrhizas",
abstract = "Infection of ryegrass roots by vesicular-arbuscular mycorrhizal (v.a.m.) endophytes occurring in an unfertilized virgin soil of low P status was more sensitive to increasing P supply than that by endophytes occurring in an adjacent fertilized agricultural soil. P application to soil depressed mycorrhiza formation in subterranean clover by increasing plant P status and not by direct effects of soil P on v.a.m. endophytes. Localized placements of superphosphate by banding or topdressing did not affect the development of mycorrhizas of roots in the fertilized zones differently from those of roots not in fertilized zones. The amount of infection was not correlated with P concentrations within the plant at harvest. However, the extent of infection could be correlated with P concentrations of roots at early stages of penetration by the fungi. Additionally, the effects of P supply on frequency of penetration by hyphae and subsequent mycorrhiza development closely paralleled effects of P supply on soluble carbohydrate concentrations in roots.",
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Phosphorus and the formation of vesicular-arbuscular mycorrhizas. / Jasper, D. A.; Robson, A. D.; Abbott, L. K.

In: Soil Biology and Biochemistry, Vol. 11, No. 5, 1979, p. 501-505.

Research output: Contribution to journalArticle

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T1 - Phosphorus and the formation of vesicular-arbuscular mycorrhizas

AU - Jasper, D. A.

AU - Robson, A. D.

AU - Abbott, L. K.

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AB - Infection of ryegrass roots by vesicular-arbuscular mycorrhizal (v.a.m.) endophytes occurring in an unfertilized virgin soil of low P status was more sensitive to increasing P supply than that by endophytes occurring in an adjacent fertilized agricultural soil. P application to soil depressed mycorrhiza formation in subterranean clover by increasing plant P status and not by direct effects of soil P on v.a.m. endophytes. Localized placements of superphosphate by banding or topdressing did not affect the development of mycorrhizas of roots in the fertilized zones differently from those of roots not in fertilized zones. The amount of infection was not correlated with P concentrations within the plant at harvest. However, the extent of infection could be correlated with P concentrations of roots at early stages of penetration by the fungi. Additionally, the effects of P supply on frequency of penetration by hyphae and subsequent mycorrhiza development closely paralleled effects of P supply on soluble carbohydrate concentrations in roots.

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