ISHS Acta Horticulturae 319: International Symposium on Transplant Production Systems
A SIDEWARD LIGHTING SYSTEM USING DIFFUSIVE OPTICAL FIBERS FOR PRODUCTION OF VIGOROUS MICROPROPAGATED PLANTLETS |
| Authors: | T. Kozai, S. Kino, B.R. Jeong, M. Kinowaki, M. Ochiai, M. Hayashi, K. Mori |
| Abstract:
A prototype sideward lighting system (SLS) using diffusive optical fibers (DOF) was developed for enhanced energy and space efficiencies and for elimination of thermal radiation problem of the SLS using fluorescent lamps. In this new system, only photosynthetically active radiation (PAR) is released from the optical fibers to plantlets. Growth of potato (Solanum tuberosum L. cv. Benimaru) plantlets was compared under two lighting systems, sideward and downward, each with and without 20 g· l-1 sucrose in the medium and gas permeable filters. Plantlets micropropagated photoautotrophically with SLS for 28 days had significantly shortened stems while gaining increased dry weight, leaf area and net photosynthetic rate (NPR), all of which are preferred characteristics of micropropagated plantlets for acclimatization to ex vitro conditions. | |
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