Plant and Soil

, Volume 198, Issue 1, pp 53–61

Influence of phosphorus on the growth and ergot alkaloid content of Neotyphodium coenophialum-infected tall fescue (Festuca arundinacea Schreb.)

  • D.P. Malinowski
  • D.P. Belesky
  • N.S. Hill
  • V.C. Baligar
  • J.M. Fedders
Article

DOI: 10.1023/A:1004279401196

Cite this article as:
Malinowski, D., Belesky, D., Hill, N. et al. Plant and Soil (1998) 198: 53. doi:10.1023/A:1004279401196

Abstract

Tall fescue (Festuca arundinacea Schreb.) plants infected by the fungal endophyte Neotyphodium coenophialum (Morgan-Jones & Gams) (Glenn et al., 1996) often perform better than noninfected plants, especially in marginal resource environments. There is a lack of information about endophyte related effects on the rhizosphere of grasses. In a greenhouse experiment, four endophyte-infected (E+) tall fescue clones (DN2, DN4, DN7, DN11) and their endophyte-free (E−) forms were grown in limed (pH 6.3) Porter soil (low fertility, acidic, high aluminum and low phosphorus content, coarse-loamy mixed mesic Umbric Dystrochrept) at three soil P levels (17, 50, and 96 mg P kg-1 soil) for five months. Excluding the genotype effect, endophyte infection significantly increased cumulative herbage DM yield by 8% at 17 mg P kg-1 soil but reduced cumulative herbage DM yield by 12% at 96 mg P kg-1 soil. With increased P availability in the soil, shoot and root DM, and root/shoot ratio in E+ plants were significantly less when compared to E− plants. Endophyte infection increased specific root length at 17 and 50 mg P kg-1soil. At soil P level of 17 mg P kg-1soil, E+ plants had significantly higher P concentrations both in roots and shoots. Similar relationships were found for Mg and Ca. E+ plants had significantly higher Zn, Fe, and Al concentration in roots, and lower Mn and Al concentration in shoots when compared to E− plants. Ergot alkaloid concentration and content in shoot of E+ plants increased with increasing P availability in the soil from 17 to 50 mg P kg-1 but declined again at 96 mg P kg-1 soil. Ergot alkaloid accumulation in roots increased linearly with P availability in the soil. Results suggest that endophyte infection affects uptake of phosphorus and other mineral nutrients and may benefit tall fescue grown on P-deficient soils. Phosphorus seems also to be involved in ergot alkaloid accumulation in endophyte-infected tall fescue.

acid soilsendophyteergot alkaloidsFestuca arundinaceaNeotyphodium coenophialumphosphorustall fescue

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • D.P. Malinowski
    • 1
  • D.P. Belesky
    • 1
    • 1
  • N.S. Hill
    • 2
  • V.C. Baligar
    • 1
  • J.M. Fedders
    • 1
  1. 1.Appalachian Soil and Water Conservation Research LaboratoryUSDA-ARSBeaverUSA
  2. 2.Department of Crop and Soil SciencesUniversity of GeorgiaAthensUSA