Shoot specific fungal endophytes alter soil phosphorus (P) fractions and potential acid phosphatase activity but do not increase P uptake in tall fescue

Na Ding, Haichao Guo, Joseph V. Kupper, David H. McNear

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Aims: An experiment was performed to test how different fungal endophyte strains influenced tall fescue’s ability to access P from four P sources varying in solubility. Methods: Novel endophyte infected (AR542E+ or AR584E+), common toxic endophyte infected (CTE+), or endophyte-free (E-) tall fescues were grown for 90 days in acidic soils amended with 30 mg kg−1 P of potassium dihydrogen phosphate (KH2PO4), iron phosphate (FePO4), aluminum phosphate (AlPO4), or tricalcium phosphate ((Ca3(PO4)2), respectively. Results: Phosphorus form strongly influenced plant biomass, P acquisition, agronomic P use efficiency, microbial communities, P fractions. P uptake and vegetative biomass were similar for plants grown with AlPO4, Ca3(PO4)2, and KH2PO4 but greater than in control and FePO4 soils. Infection with AR542E+ resulted in significantly less shoot biomass than CTE+ and E- varieties; there was no influence of endophyte on root biomass. The biomarker for arbuscular mycorrhizal fungi (AM fungi, 16:1ω5c) was selected as an effective predictor of variations in P uptake and tall fescue biomass. Potential acid phosphatase activity was strongly influenced by endophyte x P form interaction. Conclusions: Endophyte infection in tall fescue significantly affected the NaOH-extractable inorganic P fraction, but had little detectable influence on soil microbial community structure, root biomass, or P uptake.

Original languageEnglish
Pages (from-to)291-305
Number of pages15
JournalPlant and Soil
Volume401
Issue number1-2
DOIs
StatePublished - Apr 1 2016

Bibliographical note

Publisher Copyright:
© 2015, Springer International Publishing Switzerland.

Keywords

  • Epichloë coenophiala
  • Microbial community
  • Neotyphodium coenophialum
  • Phospholipid fatty acids (PLFAs)
  • Phosphorus fractions
  • Potential acid phosphatase activity (AcPase)

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

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