Endophytic actinobacteria in biosynthesis of bioactive metabolites and their application in improving crop yield and sustainable agriculture

Yadollah Bahrami, Yaser Delbari, Kimia Rafiei Buzhani, Elham Kakaei, Yaser Mohassel, Sasan Bouk, Christopher M.M. Franco

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

4 Citations (Scopus)

Abstract

Agrochemicals are broadly applied into agriculture to control pests and phytopathogens. The excessive use of agrochemical poses a huge concern for the future of agriculture. Plants are associated with numerous microbes and possess a dynamic microbiome. Endophytic Actinobacteria (EA) are a prolific source of bioactive secretion and exudation products and offer renewed attention towards attaining sustainable agriculture. Endophytic Actinobacteria can be used as a 'biofertilizer' as they have the capability to increase plant growth, crop yields and plant-resistant pathogenicity by rendering available the insoluble and complex essential macronutrients to the plant. They synthese phytohormones, siderophores, hydrogen cyanide and ammonia for the host plants. Our results cover over 85 new plant growth-promoting Actinobacteria (PGPB) species, that have been isolated from different plants, having various biological activities. This chapter describes the beneficial and positive impact of EA on the host plant growth, performance, health and resilience to pathogens and stresses and crop productivities. The knowledge obtained from this chapter can help us to understand the pivotal application of EA in advancing agricultural sustainability. This chapter also describes the structure of over 30 compounds associated with biocontrol activity, with the majority being alkaloids, polyketides, flavonoids, peptides and terpenoids. They are produced by different actinobacterial genera, with Streptomyces being the predominant contributor generating 25 compounds exclusively. Our study reveals that EA, by producing a multitude of bioactive compounds, play a significant role in plant growth and crop yields and have the potential to improve sustainability in the agriculture industry. This chapter addresses the harnessing of EA as biofertilizers, a term used to include microbial inoculants that are biocontrol and plant growth-promoting agents and that have a role in the alleviation of abiotic and biotic stresses.

Original languageEnglish
Title of host publicationNatural Products from Actinomycetes
Subtitle of host publicationDiversity, Ecology and Drug Discovery
EditorsRavishankar V. Rai, Jamuna A. Bai
Place of PublicationSingapore
PublisherSpringer Nature
Chapter5
Pages119-150
Number of pages32
ISBN (Electronic)9789811661327
ISBN (Print)9789811661310
DOIs
Publication statusPublished - 2022

Keywords

  • Biocontrol
  • Biofertilizer
  • Chemical diversity
  • Crop yields
  • Endophytic Actinobacteria
  • Phytohormone
  • Phytopathogens
  • Plant growth promotion
  • Secondary metabolites
  • Siderophore

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