Abiotic Stress Effects on Secondary Metabolite Production in Plants

Plants encounter a variety of non-living environmental challenges—such as drought, salinity, extreme temperatures and high light intensity—that provoke intricate physiological and molecular adaptations. Among these, the reconfiguration of secondary metabolite production is paramount, bolstering defence against oxidative damage, osmotic imbalance and pathogen invasion. Abiotic stress frequently redirects carbon flux from primary metabolism towards specialised biosynthetic routes, notably the phenylpropanoid, terpenoid and alkaloid pathways. As a result, stressed plants often accumulate higher levels of flavonoids, anthocyanins and terpenoids, which serve antioxidant, osmoprotective and photoprotective functions. Integrated transcriptomic and metabolomic studies have delineated regulatory circuits involving transcription factors such as MYB, bZIP, WRKY and AP2/ERF, which orchestrate the expression of key biosynthetic enzymes. Understanding these networks has broad implications: it sheds light on the fundamental mechanisms of plant resilience and informs agronomic or biotechnological strategies to enhance the yield of valuable phytochemicals under controlled or field conditions.

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Abiotic Stress Effects on Secondary Metabolite Production in Plants publication trend

The graph below shows the total number of articles in abiotic stress effects on secondary metabolite production in plants across all publications each year (not limited to Nature Index journals).

Technical terms

Abiotic stress: Non-living environmental factors such as drought, salinity, temperature extremes and light intensity that challenge plant homeostasis.

Secondary metabolites: Bioactive organic compounds not directly involved in growth or reproduction but essential for defence, signalling and stress adaptation.

Phenylpropanoid pathway: A metabolic route converting the amino acid phenylalanine into a wide array of phenolic compounds, including flavonoids, lignin precursors and anthocyanins.

Transcriptomics: The large-scale study of RNA transcripts to profile gene expression changes under specific conditions.

Metabolomics: The systematic analysis of small-molecule metabolites within a biological sample to characterise biochemical responses and pathway fluxes.

References

1. Identification of drought-responsive phenolic compounds and their biosynthetic regulation under drought stress in Ligularia fischeri. Frontiers in Plant Science (2023).
2. Integrative metabolomic and transcriptomic reveals potential mechanism for promotion of ginsenoside synthesis in Panax ginseng leaves under different light intensities. Frontiers in Bioengineering and Biotechnology (2023).
3. Plant Secondary Metabolite Biosynthesis and Transcriptional Regulation in Response to Biotic and Abiotic Stress Conditions. Agronomy (2021).