Antibiotic producing endophytic Streptomyces spp. colonize above-ground plant parts and promote shoot growth in multiple healthy and pathogen-challenged cereal crops

Microbiological Research
Janki K PatelG Archana

Abstract

The Streptomyces spp. used in this work were previously isolated as diazotrophic endophytes from sorghum stems. Here, we characterized the Streptomyces spp. for their colonization ability, plant growth promotion and protection against fungal disease in three cereals. In vitro analysis by dual culture study showed inhibitory effect on the rice pathogen Magnaporthe oryzae B157 along with inhibition of the ubiquitous phytopathogen Rhizoctonia solani by the Streptomyces spp. used in this study. The active compounds responsible for phytopathogen inhibition were extracted with ethyl acetate and tested positive against the fungal pathogens. GC-MS based identification of the active compounds responsible for fungal pathogen inhibition showed them to be 2-(chloromethyl)-2-cyclopropyloxirane, 2, 4- ditert-butylphenol and 1-ethylthio-3-methyl-1, 3-butadiene in extracts of culture supernatants from the three different strains respectively. EGFP tagged Streptomyces strains showed profuse colonization in roots as well as aerial parts of cereal plants. Direct inhibitory action against M. oryzae B157 and R. solani correlated with the observation that upon fungal pathogen challenge, the bacterized rice, sorghum and wheat plants showed significan...Continue Reading

Citations

Jun 13, 2020·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Juliana Lopes HorstmannEliane Romanato Santarém
Jun 16, 2019·Pathogens·Jake T NewittSarah F Worsley
Aug 2, 2020·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Bartholomew Saanu Adeleke, Olubukola Oluranti Babalola
Jul 2, 2021·Frontiers in Plant Science·Victor P LobanovAlyssa Joyce
Aug 24, 2021·3 Biotech·Arpan MukherjeeJay Prakash Verma
Oct 1, 2021·Plant Signaling & Behavior·Bartholomew Saanu AdelekeOlubukola Oluranti Babalola

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