Physiological and Phytochemical Responses of <i>Calendula officinalis</i> L. to End-of-Day Red/Far-Red and Green Light.

ABSTRACT: Calendula officinalis L. is a widely used medicinal plant whose secondary metabolism and morphology are influenced by light. This study evaluated the effects of 2 and 4 h end-of-day (EOD) red/far-red (R:FR) and green (G) light on the growth, physiology, and phytochemical profile of hydroponically grown C. officinalis under a constant red/blue light background, compared with a red/blue control without EOD treatment. Morphological, physiological (gas exchange, chlorophyll fluorescence), biochemical (chlorophyll, anthocyanin), and chemical composition (attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and Gas Chromatography-Mass Spectrometry (GC-MS)) were evaluated. EOD G 2 h enhanced photosynthetic pigments, anthocyanins, and biomass, while control

SUBMITTER: Lozano-Castellanos LF 

PROVIDER: S-EPMC12383836 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature