Dressed Up to the Nines: The Interplay of Phytohormones Signaling and Redox Metabolism During Plant Response to Drought

Plants, Год журнала: 2025, Номер 14(2), С. 208 - 208

Опубликована: Янв. 13, 2025

Plants must effectively respond to various environmental stimuli achieve optimal growth. This is especially relevant in the context of climate change, where drought emerges as a major factor globally impacting crops and limiting overall yield potential. Throughout evolution, plants have developed adaptative strategies for stimuli, with plant hormones reactive oxygen species (ROS) playing essential roles their development. Hormonal signaling maintenance ROS homeostasis are interconnected, indispensable growth, development, stress responses orchestrating diverse molecular during adversities. Nine principal classes phytohormones been categorized: auxins, brassinosteroids, cytokinins, gibberellins primarily oversee developmental growth regulation, while abscisic acid, ethylene, jasmonic salicylic strigolactones main orchestrators responses. Coordination between transcriptional regulation crucial effective responses, stress. Understanding interplay pivotal elucidating mechanisms involved review provides an overview intricate relationship ROS, redox metabolism, nine different plants, shedding light on potential enhancing tolerance sustainable crop production.

Язык: Английский

The SnRK1‐JMJ15‐CRF6 module integrates energy and mitochondrial signaling to balance growth and the oxidative stress response in Arabidopsis

New Phytologist, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Mitochondria support plant growth and adaptation via energy production signaling pathways. However, how mitochondria control the transition between stress response is largely unknown in plants. Using molecular approaches, we identified histone H3K4me3 demethylase JMJ15 transcription factor CRF6 as targets of SnRK1 Arabidopsis. By analyzing antimycin A (AA)-triggered mitochondrial stress, explored SnRK1, JMJ15, form a regulatory module that gauges status to balance oxidative response. SnRK1a1, catalytic α-subunit phosphorylates destabilizes inhibit its activity. While SnRK1a1 does not phosphorylate CRF6, it promotes degradation proteasome pathway. interacts with prevents phosphorylation-dependent degradation, forming an antagonistic feedback loop. are required for transcriptional reprogramming AA stress. The transcriptome profiles jmj15 crf6 mutants were highly correlated those plants overexpressing under both normal conditions. Genetic analysis revealed acts downstream JMJ15. Our findings identify SnRK1-JMJ15-CRF6 integrates growth-defense trade-off, highlighting epigenetic mechanism underlying mitonuclear communication.

Язык: Английский

Enhanced HSP70 binding to m6A-methylated RNAs facilitates cold stress adaptation in mango seedlings

BMC Plant Biology, Год журнала: 2024, Номер 24(1)

Опубликована: Ноя. 23, 2024

Cold stress poses a serious challenge to tropical fruit production, particularly in mango. N6-methyladenosine (m6A) modifications are key regulators of gene expression, enabling plants respond responses, enhance adaptation and improve resilience environmental challenges. In our study, transcriptome-wide m6A methylation profiling under cold identified 6,499 differentially methylated peaks 2,164 expressed genes (DEGs) mango seedlings. Among these genes, six exhibited both significant increases modification levels 21 showed increase but concurrent downregulation 26 reduced increased highlighting distinct regulatory patterns m6A-mediated expression control. Gene Ontology (GO) enrichment analysis revealed involvement pathways such as potassium ion import, nitrate response, transcription regulation. Notably, HSP70 was one the upregulated response stress. RNA immunoprecipitation (RNA-IP) assays confirmed association with m6A-modified RNAs vivo, supporting its role regulating stress-responsive transcripts. Additionally, immunofluorescence demonstrated formation condensates plant cells stress, indicating potential mechanism for localized stabilization. Fluorescence polarization that binds preferentially RNAs, suggesting forming protective conditions. This interaction between points helps stabilize transcripts, contributing plant's enhanced tolerance. play vital offering new insights into mango's responses breeding strategies

Язык: Английский