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<p>Plants and beneficial microbes have co-evolved as symbionts, interacting through various hormonal signalling cascades and phytochemicals upon colonization. This review investigates the potential of microbe-induced phytochemicals in plants as biopesticides to combat insect infestations, aiming to reduce reliance on synthetic chemicals, preparation of novel phytomolecule-based bio-insecticides and mitigate their environmental impacts. Various microbes, including bacteria and fungi, have been shown to elicit the production of defensive phytochemicals in plants. These induced compounds exhibit diverse mechanisms of insect deterrence, such as antifeedant activity, growth inhibition, and reproductive disruption. Upon colonization, these phytochemicals regulate various hormonal signalling cascades and produce volatile organic compounds to defend against insects. The research findings reveal that certain microbial treatments significantly boost the levels of bioactive phytochemicals, leading to marked reductions in insect damage and improved crop health. The amalgamation of volatile compounds from resistant cultivars enhances the resistance behaviour of susceptible cultivars. Quorum sensing molecules, including auto inducers, regulate the colonization of beneficial microbes in the below-ground region. Additionally, this review addresses the biochemical pathways activated by microbial induction and the potential for harnessing these natural defenses in integrated pest management strategies. Leveraging the symbiotic relationships between plants and beneficial microbes offers a novel, eco-friendly approach to enhance plant health, agricultural productivity, and sustainability. </p>

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Epiphytic microbes induced defensive phytochemicals against insects

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Jayaveni M.,
  • Johnson Thangaraj Edward Y. S.,
  • Suganthi A.,
  • Kannan M.,
  • Anandham R.,
  • Kannan R.

摘要

Plants and beneficial microbes have co-evolved as symbionts, interacting through various hormonal signalling cascades and phytochemicals upon colonization. This review investigates the potential of microbe-induced phytochemicals in plants as biopesticides to combat insect infestations, aiming to reduce reliance on synthetic chemicals, preparation of novel phytomolecule-based bio-insecticides and mitigate their environmental impacts. Various microbes, including bacteria and fungi, have been shown to elicit the production of defensive phytochemicals in plants. These induced compounds exhibit diverse mechanisms of insect deterrence, such as antifeedant activity, growth inhibition, and reproductive disruption. Upon colonization, these phytochemicals regulate various hormonal signalling cascades and produce volatile organic compounds to defend against insects. The research findings reveal that certain microbial treatments significantly boost the levels of bioactive phytochemicals, leading to marked reductions in insect damage and improved crop health. The amalgamation of volatile compounds from resistant cultivars enhances the resistance behaviour of susceptible cultivars. Quorum sensing molecules, including auto inducers, regulate the colonization of beneficial microbes in the below-ground region. Additionally, this review addresses the biochemical pathways activated by microbial induction and the potential for harnessing these natural defenses in integrated pest management strategies. Leveraging the symbiotic relationships between plants and beneficial microbes offers a novel, eco-friendly approach to enhance plant health, agricultural productivity, and sustainability.