ISHS Acta Horticulturae 562: III International Symposium on Sensors in Horticulture
CONTROL OF LED TO ACHIEVE LIGHT QUALITY AND INTENSITY IN TISSUE CULTURE AND MICRO-PROPAGATION STUDIES |
| Authors: | K.A. Jordan, J. Norikane, T. Takakura |
| Abstract:
Light emitting diodes, LED, have been used for years as low power indicator lights. These solid state devices have been improved over the years and now have greatly increased light intensity. A high intensity blue LED has only recently been developed. This development has made possible a self contained light source for plant growth. Light emitting diodes have some very unique characteristics useful for plant growth applications. An important characteristic is the spectral distribution of blue and red LED that produce light in the wavelengths of 450-500 NM and 630-700 NM, respectively. The pigments in plants absorb photons of energy in rather specific wavelengths that can be provided by a combination of Red and Blue LED. A number of recent studies demonstrated that normal plants could be grown under LED light sources. These bands are critical for normal plant growth as they fall within the Photo-synthetically Active Radiation, PARS, (400-700). Another useful characteristic is the high-energy conversion efficiency with low thermal energy production, which is especially favorable for confined applications such as micro-propagation. | |
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