Differential responses of Duo grass (Lolium × Festuca), a phosphorus hyperaccumulator to high phosphorus and poultry manure treatments

  • Priya Padmanabhan
  • Daniel L Starnes
  • Shivendra V Sahi

Abstract

Use of suitable plants to extract and concentrate excess phosphorus (P) from contaminated soil serves as an attractive method of phyto-remediation. Plant species vary considerably in their potential to assimilate different organic and inorganic P substrates. Duo grass (a hybrid of Lolium × Festuca) seedlings were grown in liquid nutrient media supplemented with various concentrations of potassium dihydrogen phosphate (KH2PO4) and phytate to study their P-accumulation potential. Plants that received extra P showed significantly greater plant biomass and accumulated more shoot P compared to the plants that were supplied with normal P. Duo was also grown in poultry manure amended soil and liquid media to evaluate their ability to grow and accumulate biomass in poultry manure impacted soils. Thus this grass species may be utilized as a P hyper-accumulator for phyto-extraction of excess P into their biomass from soils. Duo grass can utilize both organic (phytate), as well as, inorganic P from the growth medium as evidenced in the results.

Keywords: Duo grass, phosphorus, phosphorus substrates, phytate, phosphorus accumulation, phytoremediation

African Journal of Biotechnology Vol. 12(21), pp. 3191-3195

Author Biographies

Priya Padmanabhan
Department of Biology, Western Kentucky University, Bowling Green, KY 42101, USA
Daniel L Starnes
Department of Biology, Western Kentucky University, Bowling Green, KY 42101, USA
Shivendra V Sahi
Department of Biology, Western Kentucky University, Bowling Green, KY 42101, USA
Published
2016-03-10
Section
Articles

Journal Identifiers


eISSN: 1684-5315