Stress-Induced Flowering Mechanisms in Plants
Summary
Plants exposed to adverse environmental conditions often accelerate the transition from vegetative growth to flowering, a phenomenon broadly termed stress-induced flowering. Diverse abiotic stresses—drought, heat, salinity, nutrient limitation and light extremes—trigger signalling cascades that intersect with the core flowering network. Stress perception at the cellular level engages phytohormones such as abscisic acid, salicylic acid and gibberellins, which modulate key transcription factors and microRNAs. These regulators converge on floral integrator genes, notably FLOWERING LOCUS T (FT) and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1), to promote meristem identity changes. In drought escape, for example, water deficit induces miR172 and down-regulates AP2-type repressors, leading to rapid FT induction. Nutrient stress alters the activity of NIN-LIKE PROTEIN transcription factors at the shoot apical meristem, fine-tuning FT and SOC1 expression in response to nitrate availability. Photoperiodic pathways also interlink with stress signals: extended light or temperature extremes adjust CONSTANS stability, thereby affecting FT transcription. Collectively, these mechanisms enable plants to optimise reproductive success under fluctuating climates, with direct implications for crop resilience and yield stability in the face of global change.
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Stress-Induced Flowering Mechanisms in Plants publication trend
The graph below shows the total number of articles in stress-induced flowering mechanisms in plants across all publications each year (not limited to Nature Index journals).
Technical terms
Phytohormone: A small signalling molecule produced by plants that regulates growth, development and stress responses.
Florigen (FLOWERING LOCUS T): A mobile protein produced in leaves that travels to the shoot apical meristem to initiate flowering.
Drought escape: An adaptive response in which plants accelerate flowering under water-deficit conditions to complete their lifecycle.
Photoperiodism: The physiological reaction of organisms to the length of day or night, critical for timing flowering in many species.
References
- Salicylic Acid Treatment and Its Effect on Seed Yield and Seed Molecular Composition of Pisum sativum under Abiotic Stress. International Journal of Molecular Sciences (2023).
- Nutrient-mediated modulation of flowering time. Frontiers in Plant Science (2023).
- Environmental stress and flowering time. Plant Signaling & Behavior (2014).
- Nitrate acts at the Arabidopsis thaliana shoot apical meristem to regulate flowering time. New Phytologist (2019).
- Identification of Flowering Regulatory Networks and Hub Genes Expressed in the Leaves of Elymus sibiricus L. Using Comparative Transcriptome Analysis. Frontiers in Plant Science (2022).
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