Streptomyces alleviate abiotic stress in plant by producing pteridic acids

Zhijie Yang, Yijun Qiao, Naga Charan Konakalla, Emil Strøbech, Pernille Harris, Gundela Peschel, Miriam Agler-Rosenbaum, Tilmann Weber, Erik Andreasson and Ling Ding ()
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Zhijie Yang: Technical University of Denmark
Yijun Qiao: Technical University of Denmark
Naga Charan Konakalla: Swedish University of Agricultural Sciences
Emil Strøbech: Technical University of Denmark
Pernille Harris: Technical University of Denmark
Gundela Peschel: Leibniz Institute for Natural Product Research and Infection Biology—Hans Knöll Institute (HKI)
Miriam Agler-Rosenbaum: Leibniz Institute for Natural Product Research and Infection Biology—Hans Knöll Institute (HKI)
Tilmann Weber: Technical University of Denmark
Erik Andreasson: Swedish University of Agricultural Sciences
Ling Ding: Technical University of Denmark

Nature Communications, 2023, vol. 14, issue 1, 1-14

Abstract: Abstract Soil microbiota can confer fitness advantages to plants and increase crop resilience to drought and other abiotic stressors. However, there is little evidence on the mechanisms correlating a microbial trait with plant abiotic stress tolerance. Here, we report that Streptomyces effectively alleviate drought and salinity stress by producing spiroketal polyketide pteridic acid H (1) and its isomer F (2), both of which promote root growth in Arabidopsis at a concentration of 1.3 nM under abiotic stress. Transcriptomics profiles show increased expression of multiple stress responsive genes in Arabidopsis seedlings after pteridic acids treatment. We confirm in vivo a bifunctional biosynthetic gene cluster for pteridic acids and antimicrobial elaiophylin production. We propose it is mainly disseminated by vertical transmission and is geographically distributed in various environments. This discovery reveals a perspective for understanding plant-Streptomyces interactions and provides a promising approach for utilising beneficial Streptomyces and their secondary metabolites in agriculture to mitigate the detrimental effects of climate change.

Date: 2023
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DOI: 10.1038/s41467-023-43177-3

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