Effect of continuous or intermittent radiation on sweet potato plantlets in vitro |
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| Authors: | G. Sivakumar J. W. Heo T. Kozai K. Y. Paek |
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| Affiliation: | 1. Biotech Genomics, ENEA, Casaccia, Via Anguillarese 301 00060, Rome, Italysivakumar@libero.it;3. National Institute of Agricultural Engineering, RDA, Suwon 441-707, South Korea;4. Department of Bioproduction Science, Chiba University, Matsudo, Chiba 271-8510, Japan;5. Research Center for the Development of Advanced Horticultural Technology, Chungbuk National University, Cheongju, 361-763, South Korea |
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| Abstract: | SummarySingle-node cuttings of sweet potato [(Ipomoea batatas (L.) Lam. ‘Beniazuma’)] were cultured in vitro for 35 d under intermittent blue light (IB), intermittent red light (IR) and intermittent blue-plus-red light (IBR) provided by light-emitting diodes (LEDs) flashing for 10 s three-times min–1. Growth was compared with cuttings cultured under continuous blue (B), red (R) or blue-plus-red (BR) light, or cool-white fluorescent lamps (FL) with a 16 h photoperiod. Dry weights, leaf areas and carbohydrate contents were greater under the IB and IBR treatments than in the FL treatment. Our results show that a novel light source during in vitro culture of sweet potato plantlets may provide an opportunity to improve plant yield in large-scale greenhouses for commercial purposes. |
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