ABSTRACT
Spectral manipulation for crop production has emerged as an important area in crop production system. Photosynthesis is a process in which plants convert light energy to chemical energy. Quantum theory envisages light as packets of energy known as photon or quanta. Absorption spectra indicates how much each color of light is absorbed by various pigments of plants. It can be represented graphically to explain the quantum of light of different wavelengths absorbed by a pigment after a single exposure to full light. Variation in light intensity can lead to considerable changes in leaf morphology and structure. The spectral quality of light has multivarient effects on plant growth and development. The direction of light can also influence movement of chloroplasts. It is observed that when the intensity is high, chloroplast move sideways and become parallel to the light source to reduce the harmful effects of high light intensity.
