RT Journal Article T1 Effect of LED Lighting on Physical Environment and Microenvironment on In Vitro Plant Growth and Morphogenesis: The Need to Standardize Lighting Conditions and Their Description A1 Barcelo-Muñoz, Araceli A1 Barcelo-Muñoz, Marta A1 Gago-Calderon, Alfonso K1 Diodos emisores de luz K1 Plantas - Multiplicación in vitro AB In the last decades, lighting installations in plant tissue culture have generally been renewed or designed based on LED technology. Thanks to this, many different light quality advances are available but, with their massive implementation, the same issue is occurring as in the 1960s with the appearance of the Grolux (Sylvania) fluorescent tubes: there is a lack of a methodological standardization of lighting. This review analyzes the main parameters and variables that must be taken into account in the design of LED-based systems, and how these need to be described and quantified in order to homogenize and standardize the experimental conditions to obtain reproducible and comparable results and conclusions. We have designed an experimental system in which the values of the physical environment and microenvironment conditions and the behavior of plant tissue cultures maintained in cabins illuminated with two lighting designs can be compared. Grolux tubes are compared with a combination of monochromatic LED lamps calibrated to provide a spectral emission, and light irradiance values similar to those generated by the previous discharge lamps, achieving in both cases wide uniformity of radiation conditions on the shelves of the culture cabins. This study can help to understand whether it is possible to use LEDs as one standard lighting source in plant tissue culture without affecting the development of the cultures maintained with the previously regulated protocols in the different laboratories. Finally, the results presented from this caparison indicate how temperature is one of the main factors that is affected by the chosen light source PB MDPI YR 2021 FD 2021-12-25 LK https://hdl.handle.net/10630/35882 UL https://hdl.handle.net/10630/35882 LA eng NO Esta investigación fue financiada por los proyectos RTA2014–00056–C02–01 (INIA-AEI) y AVA2019.008 (20% Junta de Andalucía, 80% FEDER). DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 21 ene 2026