The beneficial root endophyte Piriformospora indica reduces egg density of the soybean cyst nematode

Ruchika Bajaj, Weiming Hu, YinYin Huang, Senyu Chen, Ram Prasad, Ajit Varma, Kathryn E. Bushley

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

The soybean cyst nematode ( Heterodera glycines) is a plant parasitic nematode that is a major plant pest worldwide and causes severe economic and yield losses. Piriformospora indica, a plant growth promoting fungus isolated from the Thar Deserts of western India, has been shown to protect a wide range of plants from various biotic and abiotic stresses. To evaluate the potential of P. indica to protect soybean ( Glycine max) seedlings from damage by the soybean cyst nematode (SCN), we amended soil with two different concentrations of P. indica (2.5% and 5% w/w) and inoculated with second-stage juveniles (J2s) of SCN in each treatment. After 60. days, abundance of nematode eggs was measured by calculating SCN egg population densities. We found that egg density/100. cc soil was significantly decreased by 29.7% and 36.7% respectively in the soil amended with 2.5% and 5% P. indica compared to a control. Amendment with P. indica also had a strong growth and yield promoting effect in Soybean. Although root biomass was significantly decreased by 27.9% and 33.5% in the two treatments compared to the control, shoot biomass (dry weight) increased by 30.8% and 8.2% in the 2.5% and 5% P. indica treatments compared to the control. Additionally, plant development was accelerated and a 75% increase in flowering was observed between the 2.5% P. indica treatment and the control. We conclude that P. indica used as a soil amendment decreases abundance of the SCN in soil and has plant-growth promoting properties that may help offset yield losses due to plant parasitic nematodes.

Original languageEnglish (US)
Pages (from-to)193-199
Number of pages7
JournalBiological Control
Volume90
DOIs
StatePublished - Nov 1 2015

Keywords

  • Biocontrol
  • Biotic stress
  • Piriformospora indica
  • Soybean
  • Soybean cyst nematode

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