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Horticulture, Environment, and Biotechnology

, Volume 59, Issue 6, pp 827–833 | Cite as

Application of plasma lighting for growth and flowering of tomato plants

  • Kyoung Sub Park
  • Sung Kyeom Kim
  • Sang Gyu Lee
  • Hee Ju Lee
  • Joon Kook Kwon
Research Report Cultivation Physiology
  • 97 Downloads

Abstract

Plasma lighting systems have been engineered to simulate sunlight. The objective of this study was to determine the effects of plasma lighting on tomato plant growth, photosynthetic characteristics, flowering rate, and physiological disorders. Tomato plants were grown in growth chambers at air temperatures of 25/23 °C (light/dark period), in a 16 h day−1 light period provided by four different light sources: 1 kW and 700 W sulfur plasma lights (1 SPL and 0.7 SPL), 1 kW indium bromide plasma light, and 700 W high pressure sodium lamp (0.7 HPS) as a control. The total dry weight and leaf area at 0.7 SPL were approximately 1.2 and 1.3 times greater, respectively, than that of 0.7 HPS at the 62 days after sowing (DAS). The maximum light assimilation rate was observed at 1 SPL at the 73 DAS. In addition, the light compensation and saturation points of the plants treated with plasma lighting were 98.5% higher compared with HPS. Those differences appeared to be related to more efficient light interception, provided by the SPL spectrum. The percentage of flowering at 0.7 SPL was 30.5%, which was higher than that at 0.7 HPS; however, there were some instances of severe blossom end rot. Results indicate that plasma lighting promotes tomato growth, flowering, and photosynthesis. Therefore, a plasma lighting system may be a valuable supplemental light source in a greenhouse or plant factory.

Keywords

CO2 compensation point Light curve Light spectrum Photosynthesis rate Supplementary lighting 

Notes

Acknowledgements

This study was supported by the 2014 Postdoctoral Fellowship Program and ICT project (PJ012059) of the National Institute of Horticultural & Herbal Science, Rural Development Administration, Republic of Korea.

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Copyright information

© Korean Society for Horticultural Science 2018

Authors and Affiliations

  1. 1.Protected Horticulture Research Institute, National Institute of Horticultural and Herbal ScienceRural Development AdministrationHamanKorea
  2. 2.Vegetable Research Division, National Institute of Horticultural and Herbal ScienceRural Development AdministrationWanjuKorea

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