PJB-2019-586
EFFECT OF DIFFERENTIAL LIGHT QUALITY ON GROWTH AND ANTIOXIDANT ENZYMES ACTIVITY ON RAPESEED (BRASSICA NAPUS L.) RECEIVING VARYING QUALITY OF LIGHTS
Muhammad Hamzah Saleem
Abstract
Light quality is a very important environmental factor for plant development and growth. In this study, the effect of different color light emitting diodes (LED) on growth, chlorophyll contents, reactive oxygen species (ROS) production, and anti-oxidative defense system was investigated. A petri dish and pot experiment was conducted under glasshouse environment using different color light emitting diodes (LED) of white (WL), red (RL), dark red (DL), mixed dark red (ML), blue (BL), and orange (OL). The results revealed that RL, DL and ML significantly (P ≤0.05) increased photosynthetic pigments, plant height and biomass as compared with control (WL). All red-light spectrum i.e., RL, DL and ML reduce the activity of superoxide dismutase (SOD) and peroxidase (POD) as well as malondialdehyde (MDA), proline contents and total soluble protein. In contrast, BL and OL reduced plant growth, biomass, chlorophyll, carotenoid contents and increased activities of SOD, POD, content of proline, MDA, and the total soluble protein. These results suggest that all red lights i.e., RL, DL and ML could improve plants growth in rapeseed can be effectively implemented for industrial production of seeds of rapeseed.
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