Transcription Factor Regulation in Plant Stress Responses

Transcription factors (TFs) are central regulators of plant adaptation to abiotic stresses such as drought, salinity and temperature extremes. These proteins sense environmental cues and translate them into precise gene expression programmes by binding to specific cis-regulatory elements in promoters. Key TF families—including basic leucine zippers (bZIPs), APETALA2/ETHYLENE RESPONSIVE FACTORS (AP2/ERFs), NACs, WRKYs and MYBs—integrate stress signals with phytohormone pathways, notably abscisic acid (ABA) and ethylene. Many TFs function as homo- or heterodimers, expanding their DNA-binding repertoire and allowing combinatorial control of downstream targets. Through recruitment of co-activators, chromatin remodellers and the general transcriptional machinery, TFs orchestrate processes such as stomatal closure, osmoprotectant synthesis, reactive oxygen species scavenging and the production of protective proteins. Recent advances have revealed dynamic interactions among TF partners, uncovering layers of specificity that can be exploited for breeding and biotechnological interventions. By elucidating these regulatory networks, researchers aim to bolster crop resilience and maintain yield stability under increasingly variable climatic conditions.

Research from Nature Portfolio

Recent studies have employed double DNA Affinity Purification sequencing (dDAP-seq) to map genome-wide binding profiles of bZIP heterodimers in Arabidopsis. This approach uncovered that heterodimerisation markedly broadens DNA-binding specificity beyond that of homodimers, revealing novel motifs associated with ABA response and seed maturation. The findings demonstrate that C/S1 bZIP pairs target distinct ACGT-containing elements and share unexpected affinities for motifs resembling yeast GCN4 sites. By defining heterodimer-specific binding landscapes, this work illuminates how combinatorial TF assemblies fine-tune stress-responsive gene networks, offering new opportunities to manipulate TF partnerships for improved stress tolerance.

Transcription Factor Regulation in Plant Stress Responses publication trend

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

Technical terms

Transcription factor (TF): A protein that recognises and binds specific DNA sequences to regulate transcription of target genes.

Basic leucine zipper (bZIP): A TF family defined by a basic DNA-binding region and a leucine zipper domain that mediates dimerisation.

APETALA2/ETHYLENE RESPONSIVE FACTOR (AP2/ERF): A family of plant TFs with an AP2 DNA-binding domain, implicated in hormone signalling and stress responses.

Abscisic acid (ABA): A phytohormone that orchestrates plant responses to abiotic stress, particularly drought and salinity.

Double DNA Affinity Purification sequencing (dDAP-seq): A method for profiling in vivo binding sites of TF heterodimers across the genome.

References

1. Double DAP-seq uncovered synergistic DNA binding of interacting bZIP transcription factors. Nature Communications (2023).
2. AP2/ERF Transcription Factor Regulatory Networks in Hormone and Abiotic Stress Responses in Arabidopsis. Frontiers in Plant Science (2019).
3. Characterization of OsbZIP23 as a Key Player of the Basic Leucine Zipper Transcription Factor Family for Conferring Abscisic Acid Sensitivity and Salinity and Drought Tolerance in Rice. Plant Physiology (2008).
4. ETHYLENE RESPONSE FACTOR6 Acts as a Central Regulator of Leaf Growth under Water-Limiting Conditions in Arabidopsis. Plant Physiology (2013).