Temporal Regulation of WRKY6 in Solanum pennellii

The Role of UV-A Light in Plant Physiology Light is a fundamental environmental factor that influences plant growth, development, and stress responses. While the effects of ultraviolet (UV) radiation on plants have been extensively studied, the specific impacts of UV-A light (315–400 nm), particularly its wavelength and intensity, remain less understood. UV-A radiation is known to influence various plant processes, including photosynthesis, photomorphogenesis, and secondary metabolite production. Unlike UV-B, which primarily induces stress responses, UV-A can act as a photoregulatory signal, modulating plant growth and development. Recent advancements in LED technology and high-throughput phenotyping have opened new avenues for investigating how UV-A radiation affects plant physiology, morphology, and biochemical composition. These effects of UV-A are highly species-specific, dose-dependent, and influenced by environmental conditions. A study conducted by Vodnik et al. (2023), examines the effects of supplemental UV-A light of different wavelengths (365 nm and 385 nm) and intensities on basil ( Ocimum basilicum L. ). It combines conventional physiological measurements, biochemical analyses, and high-throughput phenotyping to provide a comprehensive understanding of basil’s response to UV-A radiation. Four treatments combine baseline red–blue LEDs with UV-A at 365 nm, 385 nm, or both, at total intensities ranging from 3.5 to 16 W m⁻² (E1–E4). Plant traits are assessed using 3D multispectral scanning, chlorophyll fluorescence imaging using the CropReporter , and biochemical analyses of pigments and phenolic compounds.