Competition for phosphorus: Differential uptake from dual-isotope-labeled soil interspaces between shrub and grass

Martyn M. Caldwell, David M. Eissenstat, James H. Richards, Michael F. Allen

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

Two species of Agropyron grass differed strikingly in their capacity to compete for phosphate in soil interspaces shared with a common competitor, the sagebrush Artemisia tridentata. Of the total phosphorus-32 and -33 absorbed by Artemisia, 86 percent was from the interspace shared with Agropyron spicatum and only 14 percent from that shared with Agropyron desertorum. Actively absorbing mycorrhizal roots of Agropyron and Artemisia were present itn both interspaces, where competition for the labeled phosphate occurred. The results have important implications about the way in which plants compete for resources below ground in both natural plant communities and agricultural intercropping systems.

Original languageEnglish (US)
Pages (from-to)384-386
Number of pages3
JournalScience
Volume229
Issue number4711
DOIs
StatePublished - Jan 1 1985

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Artemisia
Agropyron
isotopes
shrubs
grasses
phosphorus
Agropyron desertorum
Pseudoroegneria spicata
phosphates
Artemisia tridentata
soil
intercropping
plant communities

All Science Journal Classification (ASJC) codes

  • General

Cite this

Caldwell, Martyn M. ; Eissenstat, David M. ; Richards, James H. ; Allen, Michael F. / Competition for phosphorus : Differential uptake from dual-isotope-labeled soil interspaces between shrub and grass. In: Science. 1985 ; Vol. 229, No. 4711. pp. 384-386.
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Competition for phosphorus : Differential uptake from dual-isotope-labeled soil interspaces between shrub and grass. / Caldwell, Martyn M.; Eissenstat, David M.; Richards, James H.; Allen, Michael F.

In: Science, Vol. 229, No. 4711, 01.01.1985, p. 384-386.

Research output: Contribution to journalArticle

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T1 - Competition for phosphorus

T2 - Differential uptake from dual-isotope-labeled soil interspaces between shrub and grass

AU - Caldwell, Martyn M.

AU - Eissenstat, David M.

AU - Richards, James H.

AU - Allen, Michael F.

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AB - Two species of Agropyron grass differed strikingly in their capacity to compete for phosphate in soil interspaces shared with a common competitor, the sagebrush Artemisia tridentata. Of the total phosphorus-32 and -33 absorbed by Artemisia, 86 percent was from the interspace shared with Agropyron spicatum and only 14 percent from that shared with Agropyron desertorum. Actively absorbing mycorrhizal roots of Agropyron and Artemisia were present itn both interspaces, where competition for the labeled phosphate occurred. The results have important implications about the way in which plants compete for resources below ground in both natural plant communities and agricultural intercropping systems.

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