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Fire and seed dormancy: A global meta-analysis.
Ann Bot
December 2024
Department of Agronomy, University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
Background And Aims: Fire-released seed dormancy (SD) is a key trait for successful germination and plant persistence in many fire-prone ecosystems. Many local studies have shown that fire-released SD depends on heat and exposure time, dose of smoke-derived compounds, SD class, plant lineage and the fire regime. However, a global quantitative analysis of fire-released SD is lacking.
View Article and Find Full Text PDFNerve Growth Factor Signaling Promotes Nuclear Translocation of TRAF4 to Enhance Tumor Stemness and Metastatic Dormancy Via C-Jun-mediated IL-8 Autocrine.
Adv Sci (Weinh)
December 2024
State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Department of Physiology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, China.
Tumor necrosis factor receptor-associated factor 4 (TRAF4), an E3 ubiquitin ligase, is frequently overexpressed in tumors. Although its cytoplasmic role in tumor progression is well-documented, the precise mechanisms underlying its nuclear localization and functional contributions in tumor cells remain elusive. This study demonstrated a positive correlation between the expression of nuclear TRAF4 and both tumor grades and stemness signatures in human cancer tissues.
View Article and Find Full Text PDFRedox Control of Seed Germination is Mediated by the Crosstalk of Nitric Oxide and Reactive Oxygen Species.
Antioxid Redox Signal
November 2024
Department of Biology, Memorial University of Newfoundland, St. John's, Canada.
Seed germination and seedling establishment are characterized by changes in the intracellular redox state modulated by accelerated production of nitric oxide (NO) and reactive oxygen species (ROS). Redox regulation and enhanced accumulation of NO and ROS, approaching excessively high levels during seed imbibition, are critically important for breaking endodormancy and inducing germination. Upon depletion of oxygen under the seed coat, NO is produced anaerobically in the reductive pathway associated mainly with mitochondria, and it participates in the energy metabolism of the seed until radicle protrusion.
View Article and Find Full Text PDFComparison of distinct gut bacterial communities in different stage of prediapause and nondiapause larvae in .
Front Microbiol
October 2024
School of Grassland Science, Beijing Forestry University, Beijing, China.
Article Synopsis
- Symbiotic microorganisms in insects play key roles in nutrient metabolism, immune regulation, and development, yet their response to insect diapause preparation is not well understood.
- Research compared gut bacterial communities in larvae under different light conditions (nondiapause vs. prediapause) using advanced sequencing techniques.
- Findings showed significant differences in bacterial diversity and abundance between the two groups, with varying dominant bacteria present in different larval stages and notable differences in amino acid and carbohydrate metabolism across the stages of diapause.
Metabolite and Transcriptomic Changes Reveal the Cold Stratification Process in Seeds.
Plants (Basel)
September 2024
Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China.
Article Synopsis
- The study focuses on *Ying*, an endangered medicinal herb whose seeds require cold stratification to break dormancy and germinate, yet the molecular processes behind this are not fully understood.
- Researchers used transcriptomic and metabolomic techniques to analyze seed changes during different stratification stages, identifying significant shifts in properties and enzyme activities.
- The findings revealed 37 plant hormone metabolites and 65,372 differentially expressed genes, highlighting complex interactions between hormones, which could aid breeding and cultivation efforts for this valuable plant.
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