Genetic Regulation of Abiotic Stress Responses in Plants

Plants are continually exposed to environmental extremes such as drought, salinity, temperature extremes and nutrient imbalance, collectively termed abiotic stresses. Adaptive responses to these conditions depend on intricate genetic programmes that perceive external cues, transduce signals and reconfigure gene expression to confer tolerance. Central to these programmes are hormone-mediated pathways, notably those governed by abscisic acid (ABA), which orchestrate stomatal closure, osmoprotectant accumulation and cellular antioxidant defence. At the molecular level, a diverse array of transcription factors—including AP2/ERF, NAC, MYB, bZIP and specialised families such as PHD finger and Alfin-like proteins—bind discrete cis-regulatory elements (for example ABRE and DRE) to modulate stress-responsive genes. Epigenetic mechanisms, encompassing chromatin remodelling, DNA methylation and small RNAs, further refine transcriptional outputs and can establish stress ‘memory’ that primes subsequent responses. Advances in genome sequencing and functional genomics have enabled genome-wide identification of key gene families and regulatory motifs, while quantitative trait locus mapping and association studies have linked natural variation to stress tolerance. The integration of these insights is informing precision breeding and biotechnological approaches—such as marker-assisted selection and gene editing—to develop crop cultivars capable of withstanding the escalating pressures of climate variability and soil degradation.

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Genetic Regulation of Abiotic Stress Responses in Plants publication trend

The graph below shows the total number of articles in genetic regulation of abiotic stress responses in plants across all publications each year (not limited to Nature Index journals).

Technical terms

Transcription factor: A protein that binds specific DNA sequences to regulate the transcription of genetic information from DNA to mRNA.

Cis-regulatory element: A short DNA sequence in a gene’s promoter region that is recognised by transcription factors to control gene expression.

Abscisic acid (ABA): A plant hormone that mediates responses to abiotic stress, particularly drought and salinity, by regulating stomatal closure and gene expression.

PHD finger: A zinc-binding motif in proteins that ‘reads’ histone modifications and influences chromatin structure and gene expression.

Reactive oxygen species (ROS): Chemically reactive molecules containing oxygen that accumulate under stress and function as signalling agents but can also cause cellular damage.

References

1. Genome-wide identification of Alfin Like (AL) transcription factors and their regulatory role in abiotic stress responses in Poplar (Populus trichocarpa). Plant Stress (2023).
2. Genome-Wide Identification and Expression Analysis of Cysteine-Rich Polycomb-like Protein (CPP) Gene Family in Tomato. International Journal of Molecular Sciences (2023).
3. PHD finger proteins function in plant development and abiotic stress responses: an overview. Frontiers in Plant Science (2023).