Bioactive chemical constituents produced by endophytes and effects on rice plant growth

Muhammad Waqas, Abdul Latif Khan, In Jung Lee

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

We investigated the bioactive potential of fungal endophytes isolated from the roots of Glycine max (L.) Merr. and Cucumis sativus. Initial screening results showed that endophytes, (Chrysosporium pseudomerdarium, Aspergillus fumigates and Paecilomyces sp., Penicillium sp., Phoma glomerata, and Paecilomyces formosus) were promoting the growth attributes (shoot length, chlorophyll contents, and biomass) of mutant and wild-type rice. To know whether, these endophytes were producing bioactive chemical constituents; the endophytes were grown in potato dextrose, czapek broth, and ICI mediums that resulted in varying mycelia biomass. The advance chromatographic analysis of endophytic fungal culture filtrate showed gibberellins (GA) production namely GA1 (0.05-10.55 ngml-1), GA3 (0.48-9.0 ngml-1), GA4 (0.2-8.0 ngml-1), GA7 (1.4-6.5 ngml-1), and GA9 (0.03-1.05 ngml-1) while among endophytes, P. glomerata and P. formosus were highly potent in GAs production. Additionally, the endophyte?s culture also contained indole-3-acetic acid (0.23-71.51 μgml-1). Furthermore, oxalic (0.009-0.3 mgl-1), quinic (0.019-0.22 mgl-1), malic (1.94-17.2 mgl-1), and citric (0.012-0.95 mgl-1) acids were also present in the endophytic cultures. The biochemical potential of endophytes greatly varied depending on nutrient source and pH, however, czapek broth rich in carbon revealed higher potential for bioactive chemical constituent?s production. In conclusion, the current findings suggest that endophyte can play a vital role in essential crop plant growth by synthesizing a wide array of bioactive metabolites. Furthermore, an increased production of chemical constituents can be achieved by changing the in vitro growth conditions of endophytes.

Original languageEnglish
Pages (from-to)478-487
Number of pages10
JournalJournal of Plant Interactions
Volume9
Issue number1
DOIs
StatePublished - 2014

Keywords

  • Fungal endophytes
  • Gibberellins
  • IAA
  • Nutrient media
  • Organic acids
  • PH

Fingerprint

Dive into the research topics of 'Bioactive chemical constituents produced by endophytes and effects on rice plant growth'. Together they form a unique fingerprint.

Cite this