Light Intensity- and Spectrum-Dependent Redox Regulation of Plant Metabolism.

Area of Science:

• Plant Physiology
• Biochemistry
• Molecular Biology

Background:

• Light intensity and spectrum significantly influence photosynthesis and reactive oxygen species (ROS) production.
• ROS and antioxidants establish the cellular redox environment, vital for metabolic adaptation to environmental changes.
• Plants face dynamic light conditions due to spatial and temporal variations, impacting growth and development.

Purpose of the Study:

• To review the current understanding of light-associated redox control on plant metabolism.
• To highlight the role of photoreceptor-controlled transcription factors and cellular redox changes in metabolic fine-tuning.
• To explore the impact of light on basic and secondary metabolic pathways.

Main Methods:

• Literature review of recent publications on light, ROS, redox signaling, and plant metabolism.
• Analysis of molecular mechanisms involving photoreceptors and transcription factors (e.g., HY5).
• Synthesis of knowledge on the impact of light on carbon, nitrogen, amino acid, sulfur, lipid, and nucleic acid metabolism.

Main Results:

• Blue and red light spectra are critical for metabolic regulation due to chlorophyll absorption and photoreceptor sensitivity.
• Photoreceptor-mediated transcription factors like HY5 play a key role in coordinating metabolic adjustments.
• Light-induced redox signaling influences both basic and secondary metabolic pathways, including terpenoids, flavonoids, and alkaloids.

Conclusions:

• Light-driven redox control is fundamental for plant metabolic reprogramming, growth, and development.
• Understanding these mechanisms offers potential for enhancing crop productivity.
• This review consolidates knowledge on light-associated metabolic regulation for future research and application.