Vol. 81 No: 3

Title:
Effect of continuous or intermittent radiation on sweet potato plantlets in vitro

Authors:
G. SIVAKUMAR, J.W. HEO, T. KOZAI and K.Y.K PAEK

pp: 546-548

Abstract:
Single-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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