Cell-type specific early perception of nine phytohormones revealed by single-nucleus transcriptomics in Arabidopsis

Time-Resolved Transcriptomics Reveals Coordinated ROS, SOS and ABA Signaling in White Birch

Overall, B. platyphylla responds to salt stress through a temporally coordinated regulatory network, providing new molecular insights into salt tolerance mechanisms in woody plants.

Integrated analysis of ROS, hormone signaling and transcriptional networks reveals candidate regulatory programs associated with hormone-free callus formation in kiwifruit

Jasmonic acid signaling in plants: regulatory mechanisms in development and stress responses.

This review synthesizes the significant advancements made over the past decade in understanding JA's role in regulating plant development and mediating responses to environmental stresses, areas that lacked systematic review in previous years.

Time-resolved transcriptomics reveals ABA-related regulation and phenylpropanoid responses in Herpetospermum pedunculosum roots under salt stress.

This study provides a root-focused transcriptomic resource and identifies candidate regulatory genes potentially linking ABA-related responses with lignin/lignan-associated metabolism in H. pedunculosum under salt stress.

dizzy1 coordinates shoot and root development, constitutive stress responses, and phytohormone signaling in maize

We identified the monogenic recessive maize (Zea mays L.) mutant dizzy1 in a segregating F2-family by a forward genetic screen of the BonnMu population, a sequence-indexed collection of Mutator transposon-induced mutants. dizzy1 exhibits a dwarf phenotype with pronounced twisting of leaves and roots. Histological analyses revealed irregular cell organization in dizzy1, including enlarged upper epidermal cells in leaves and disorganized cortical cell architecture in roots. Physiological analysis of primary roots indicated reduced cell viability, reflected by increased membrane permeability and altered metabolic activity. Hormone response assays further showed that dizzy1 is insensitive to brassinolide, exhibits a delayed auxin-promoted shoot response, and displays altered gibberellin effects on lateral root development. Bulked segregant RNA sequencing mapped the dizzy1 locus to chromosome 2. Comparative transcriptome profiling of primary roots identified 4,378 differentially expressed genes between wild type and dizzy1, revealing widespread transcriptional reprogramming. Consistent with functional enrichment analyses, histochemical and spectrophotometric assays indicated elevated reactive oxygen species and increased lignin in diz1 primary roots. These findings define dizzy1 as a pleiotropic developmental mutant linking hormone signaling, redox homeostasis, and cell wall regulation in maize growth.

Integrated Transcriptomic Profiling Reveals Distinct and Overlapping Transcriptional Responses and Regulatory Pathways Mediated by Salicylic Acid, Jasmonic Acid, and Abscisic Acid in Lotus (Nelumbo nucifera)

Sacred lotus (Nelumbo nucifera) is an important aquatic crop whose growth and productivity are severely constrained by environmental stresses. Salicylic Acid (SA), Jasmonic Acid (JA), and Abscisic Acid (ABA) are key plant growth regulators (PGRs) involved in stress responses, but their regulatory mechanisms in lotus remain unclear. In this study, transcriptome sequencing was performed in lotus seedlings treated with exogenous SA, JA, and ABA to characterize hormone-responsive regulatory networks. SA predominantly resulted in transcriptional repression, with responsive genes mainly associated with photosynthesis and ribosome-related pathways, whereas JA and ABA showed similar regulatory patterns with enrichment of hormone signaling and Mitogen-activated protein kinase (MAPK) pathways, but distinct roles in defense regulation and stress adaptation. A total of 607 genes were identified as commonly responsive to the three PGRs and were significantly enriched in cold response, defense response, secondary metabolism, and photosynthesis-related pathways. Protein–protein interaction analysis identified two hub genes encoding light-harvesting chlorophyll a/b-binding proteins, suggesting that the photosynthesis–antenna proteins pathway may represent a convergent regulatory node in hormone-mediated stress responses. This study provides new insights into SA-, JA-, and ABA-mediated stress responses and identifies potential candidate genes for improving stress tolerance in lotus.