Abiotic Stress Response Mechanisms in Plant Systems
Summary
Plants encounter a spectrum of non-living (abiotic) challenges—including drought, salinity, extreme temperatures and oxidative stress—that impede growth and threaten food security. These stressors are perceived by specialised sensors at the cell surface or within organelles, initiating signal transduction cascades that often converge on the accumulation of the phytohormone abscisic acid (ABA). ABA orchestrates stomatal closure, transcriptional reprogramming and the activation of ion transporters to preserve water and ionic homeostasis. Concurrently, signal cascades engage mitogen-activated protein kinases, calcium-dependent protein kinases and various second messengers to modulate the activity of transcription factors. These factors induce protective proteins—such as heat-shock proteins and late embryogenesis abundant proteins—and promote the biosynthesis of osmoprotectants (for example proline and glycine betaine) and antioxidant enzymes that detoxify reactive oxygen species. At the cellular level, modifications to membrane composition, cytoskeletal dynamics and secondary metabolite profiles further enhance resilience. Advances in genomics and high-throughput transcriptomics have begun to reveal conserved regulatory modules across model and crop species, enabling marker-assisted breeding and biotechnological approaches aimed at sustainable yield under adverse environments.
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Abiotic Stress Response Mechanisms in Plant Systems publication trend
The graph below shows the total number of articles in abiotic stress response mechanisms in plant systems across all publications each year (not limited to Nature Index journals).
Technical terms
Abscisic acid (ABA): A plant hormone that mediates responses to water deficit and salinity by regulating stomatal closure and stress-responsive gene expression.
Reactive oxygen species (ROS): Highly reactive molecules derived from oxygen that accumulate under stress and can damage proteins, lipids and DNA.
Osmoprotectant: Small organic compounds (for example proline and glycine betaine) that stabilise proteins and membranes and maintain cellular osmotic balance.
Signal transduction: The process by which external stimuli are converted into intracellular biochemical events, often involving phosphorylation cascades and second messengers.
Transcription factor: A protein that binds specific DNA sequences to regulate the transcription of target genes in response to developmental or environmental cues.
Heat-shock protein: Molecular chaperones that assist in protein folding and protect cellular components under elevated temperature stress.
References
- Abiotic Stress in Crop Production. International Journal of Molecular Sciences (2023).
- Plants’ Response to Abiotic Stress: Mechanisms and Strategies. International Journal of Molecular Sciences (2023).
- Characterization of the Gh4CL gene family reveals a role of Gh4CL7 in drought tolerance. BMC Plant Biology (2020).
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