Plant Growth Regulation Mechanisms in Orchidaceae
Summary
The Orchidaceae family exhibits remarkable developmental plasticity mediated by intricate hormonal networks and environmental cues. Central to vegetative growth and floral induction are phytohormones such as auxins, cytokinins, gibberellins and ethylene, which interact through signalling cascades to regulate cell division, organogenesis and the transition from vegetative to reproductive phases. Light quality, photoperiod and temperature successive regimes modulate endogenous hormone levels and gene expression programmes governing meristem identity and inflorescence initiation. Tissue-culture techniques exploit these insights to optimise micropropagation, somatic embryogenesis and ex situ conservation. At the molecular level, transcription factors of the MADS-box family and DELLA proteins integrate environmental stimuli with hormonal status to fine-tune developmental timing. Practical applications span commercial floriculture—where controlled environment strategies synchronise flowering for market demand—to habitat restoration efforts seeking to bolster genetic diversity through seedling propagation. Emerging research continues to unravel cross-talk between signalling pathways, advancing our capacity to engineer resilient orchids adapted to shifting climates and cultivation systems.
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Plant Growth Regulation Mechanisms in Orchidaceae publication trend
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Technical terms
Phytohormone: A naturally occurring chemical messenger that regulates plant growth, development and adaptive responses.
Photoperiod: The duration of light and dark periods within a 24-hour cycle, influencing flowering and developmental transitions.
Inflorescence: The complete flower head of a plant, including stems, stalks and blooms, arising from the shoot apical meristem.
Accumulation temperature: A cumulative index of heat units derived from day and night temperatures, used to predict developmental milestones such as flowering.
References
- The Effect of Temperature on the Inflorescence Formation Model for Phalaenopsis. Plants (2024).
- Flowering Mechanisms and Environmental Stimuli for Flower Transition: Bases for Production Scheduling in Greenhouse Floriculture. Plants (2022).
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