Validating the efficacy of the gcp6-MPC5 haplotype in diverse genetic backgrounds and under various climate scenarios

The gap

Evidence profile

Sourced from the future-work section and future work and stated challenges of the source papers, classified as general, drawn from work published between 2024 and 2026, spanning 5 journals. Those papers have been cited 80 times in total.

Supporting evidence — 6 representative gaps

• The GCP6-MPC5 module: a key genetic switch for balancing rice grain quality and environmental adaptability (2026) · Plant Cell Reports · doi

  Validating the efficacy of the gcp6-MPC5 haplotype in diverse genetic backgrounds and under various climate scenarios. Investigating the interaction between GCP6 and other key stress-responsive transcription factors. Decoding the genetics of phenotypic plasticity to develop next-generation crops. Exploring the potential epigenetic or post-transcriptional layers of regulation that could modulate plasticity.

  generalfuture-work section
  Keywords: validating efficacy gcp6-mpc5 haplotype diverse genetic backgrounds various
• Epigenetic Regulation of Salt Stress Responses in Tomato: From DNA Methylation to Stress Memory (2026) · Horticulturae · doi

  The epigenetic regulation of salt stress responses in tomato involves multiple inter- connected layers that together form a sophisticated regulatory network. DNA methylation dynamics, mediated by various DNA methyltransferases, enable rapid methylome re- programming under stress. Examples such as PKE1 (gene-body methylation) and SlGI (SAMS1-mediated methylation) reveal novel mechanisms for fine-tuning stress tolerance. The RdDM pathway, through core components like SlAGO4A, illustrates the delicate bal- ance between growth and stress adaptation, where stress-induced genes can paradoxically function as negative regulators to prevent overactivation of stress responses. Studies in Arabidopsis (AtMYB74) provide a mechanistic blueprint for RdDM-mediated control of transcription factor expression, likely applicable to tomato. Histone modifications, partic- ularly acetylation and deacetylation mediated by HATs and HDACs, add another layer of regulatory complexity. Multiple HDACs (SlHDA1, SlHDA3, SlHDA5) have been char- acterized as positive regulators of stress tolerance, often acting through ABA signaling. GCN5 emerges as a conserved master regulator of cell wall integrity under salt stress. Furthermore, grafting-induced epigenetic changes highlight the potential for stress mem- ory and epigenetic priming to enhance tolerance without genetic modification. A major https://doi.org/10.3390/horticulturae12060649 Horticulturae 2026, 12, 649 11 of 14 gap remains in our understanding of histone methylation in tomato, which has not been functionally studied under salt stress despite extensive research in other species. Despite significant progress, several key questions remain. First, the genome-wide dynamics of DNA methylation and histone modifications under salt stress require higher- resolution temporal and spatial analyses. Emerging technologies such as single-cell epige- nomics could reveal cell-type-specific epigenetic responses masked in bulk tissue analyses. Second, the interplay between different epigenetic layers, namely DNA methylation, RdDM, and histone modifications, remains poorly understood. Based on current evidence, it is likely that RdDM acts upstream to establish DNA methylation patterns, which then influ- ence histone modification states. However, feedback loops exist (e.g., H3K9me2 recruits DRMs). Time-resolved experiments (e.g., time-course ChIP-seq and WGBS) are needed to dissect the order of events and determine whether these mechanisms act sequentially or in parallel. Third, the upstream signals that trigger epigenetic changes under salt stress need further investigation. How do plants sense salt stress and transduce these signals to the epigenetic machinery? Fourth, the heritability of stress-induced epigenetic changes and their potential for transgenerational stress memory in tomato remains largely unexplored. Grafting studies suggest that some epigenetic marks can be transmitted, but the stability and mechanisms of inheritance

  generalfuture workevidence 5/5
  Keywords: stress epigenetic methylation salt histone tomato mediated rddm responses mechanisms tolerance induced modifications slhda cell
• Molecular Insights into ABA-Mediated Regulation of Stress Tolerance and Development in Plants (2025) · International Journal of Molecular Sciences · cited 58× · doi

  Abscisic acid plays a pivotal role in regulating plant responses to abiotic stresses, such as drought, salinity, and extreme temperatures, while also influencing key growth and de- velopmental processes. While significant progress has been made in understanding ABA’s molecular mechanisms, there are still considerable gaps that hinder the full application of this knowledge to improve stress tolerance in crops. One of the primary challenges is understanding how ABA functions under conditions of multiple combinatorial stresses, such as drought in combination with high temperature or salinity, which plants frequently experience in natural and agricultural settings. Although research has identified critical regulatory genes and pathways involved in ABA signaling, the interaction between ABA and other phytohormones, environmental signals, and biotic stress responses remains inadequately characterized. To address these issues, it is essential for future research to move beyond model organisms and focus on integrating insights into crop species that face real-world challenges in diverse and changing environments. One promising approach could be the application of advanced “omics” technologies, which provide a more holistic view of ABA-mediated responses across the plant’s genome, proteome, and metabolome. Additionally, leveraging emerging tools such as CRISPR-Cas9 for precise gene editing could allow for targeted manipulation of ABA signaling pathways in crops, facilitating the development of stress- resilient varieties with improved productivity. Furthermore, the role of ABA in regulating plant responses to biotic stress, such as pathogen resistance, has been underexplored and deserves more attention, particularly given the increasing threat of disease in stressed plants. A deeper understanding of ABA’s interplay with the plant immune system could open new avenues for improving resistance to both biotrophic and necrotrophic pathogens. In conclusion, future efforts should prioritize a systems-level understanding of ABA’s role in plant adaptation to multiple environmental stresses. By addressing these research gaps, integrating knowledge across disciplines, and applying cutting-edge technologies, we can unlock the potential of ABA to enhance crop resilience, providing critical solutions for agriculture in the face of global climate change. Supplementary Materials: The following supporting information can be downloaded at: https://www. mdpi.com/article/10.3390/ijms26167872/s1. Funding: The authors declare that no funds, grants, or other support were received during the preparation of this manuscript. Conflicts of Interest: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

  generalfuture workevidence 5/5
  Keywords: plant responses understanding stress role stresses regulating drought salinity gaps application knowledge crops challenges multiple
• Recent Advances in Studies of Genomic DNA Methylation and Its Involvement in Regulating Drought Stress Response in Crops (2024) · Plants · cited 21× · doi

  Abiotic stresses such as drought have a huge impact on plants and can affect a wide range of plant growth and development, morphological indicators, and yield. Coupled with the fact that drought stress, an environmental problem, is a global issue, research related to drought tolerance and drought resistance in plants has been one of the key fo- cuses of researchers. Epigenetics, a relatively new topical issue with respect to regulation of gene expression in response to environmental conditions, is also important as it can produce intergenerationally transmissible changes in phenotypic traits without altering the gene sequences. The current review identifies efficient methylation detection technologies tailored to their specific objectives, facilitating further studies in this field. The current review has Plants 2024, 13, 1400 16 of 23 summarized the molecular mechanisms underlying the patterns and changes in DNA methylation, thus assisting researchers of drought responses to streamline and accelerate future efforts toward research progress. Furthermore, we have summarized the details of the shifts in patterns, level changes, and physiological and ecological responses of DNA methylation to drought stress in Table 1. In our literature review, we identified numerous studies focusing on DNA methylation and drought stress, indicating significant interest in this area. However, most studies only demonstrated that plants exhibit DNA methylation changes at the whole genomic level under drought conditions. This review concentrated on studies that showed specified DNA methylation changes of pathways and genes, presenting data with defined changes in ratios between drought and control, which provides a solid foundation for more de- tailed investigations. These findings suggest that increased DNA methylation across the genome primarily serves to deactivate non-essential functions related to stress resistance. Changes in the methylation of promoter regions are tailored to the genes that respond to drought, influencing plant growth and development through various pathways, includ- ing the biological clock. These results in alterations to plant morphology and physiology, enabling adaptation to environmental shifts or survival under extreme conditions. Efforts toward genetic improvement of crops using DNA methylation are still de- voted to discovering loci that respond to drought stress, and verifying whether their meth- ylation status is tightly correlated with plant drought resistance, then using advanced gene targeted editing technologies and biotechnological approaches [145–147], such as CRISPR/Cas9, to change the loci into a sustained methylated or demethylated state, so as to obtain new germplasm with enhanced drought resistance. However, more specific studies, such as the molecular mechanisms of DNA methyl- ation in response to drought stress, includi

  generalfuture workevidence 5/5
  Keywords: drought methylation changes stress plants plant resistance review environmental gene conditions growth development issue related
• ABI5-activated ALKBH10B demethylates RAP2.6 mRNA to modulate Arabidopsis salt tolerance (2026) · Plant Cell Reports · doi

  Salt stress imposes osmotic, ionic, and oxidative stresses that collectively inhibit plant growth and reduce productivity. The complex regulatory network of dynamic m6A modifications in plant stress adaptation poses a challenge for understanding the role of ALKBH10B. The paper identifies technical challenges in studying RNA epigenetic modifications, such as the need for specific antibodies and experimental design.

  generalstated challengesevidence 5/5
  Keywords: salt stress imposes osmotic ionic oxidative stresses collectively
• Unlocking the Functional Dynamics of ERF013 in Arabidopsis thaliana: A Key Player in Plant Growth Regulation (2026) · Journal of Plant Growth Regulation · cited 1× · doi

  future studies using Chip-qPCR or promoter-reporter assays are needed to confirm whether AtERF013 directly regulates YUC and ASA1, - future studies employing chromatin immunoprecipitation followed by qPCR (ChIP-qPCR), yeast one-hybrid (Y1H), or promoter-reporter assay will be required to determine whether AtERF013 directly bind to the promoters of YUC and ASA1 genes, - direct assessment of stress tolerance, - research on the role of AtERF013 in environmental stress resilience, its regulatory networks, and its potential application in improving crop tolerance

  generalfuture-work sectionevidence 5/5
  Keywords: future studies using chip-qpcr promoter-reporter assays needed confirm

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