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2020 Vol.65, Issue 4 Preview Page
Effect of LED Light Intensity on Seedling Quality and Tuber Production of Potato Stem Cuttings Grown in a Closed-Type Plant Production System

폐쇄형식물생산시스템을 이용한 감자 경삽묘 육묘시 묘소질과 괴경 생산에 대한 LED 광도의 영향

Man Hyun Jo1*
,
In Ki Ham2
,
Kwon Seo Park1
,
Ji Hong Cho3
조 만현1*
,
함 인기2
,
박 권서1
,
조 지홍3
1Junior Research Scientist, Seed Management Office, Chungcheongnam-do Agricultural Research and Extension Services
2Senior Research Scientist, Horticulture Research Division, Chungcheongnam-do Agricultural Research and Extension Services
3Senior Research Scientist, Highland Agriculture Research Institute, National Institute of Crop Science, Rural Development Administration
1충청남도농업기술원 종자관리소 농업연구사
2충청남도농업기술원 원예연구과 농업연구관
3농촌진흥청 국립식량과학원 고령지농업연구소 농업연구관
*Corresponding Author
1 December 2020. pp. 468-476
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Abstract

This study was performed to establish light intensity conditions for producing stem cuttings for aeroponic systems suitable for seed potato production using a closed-type plant production system. Shoot tip cultured plantlets of ‘Sumi’ and ‘Chubaek’ potato (Solanum tuberosum L.) were acclimatized, cuttings were collected, and stem cuttings were planted. The seedlings were raised for 40 days at different LED light intensities (60, 120, 180, and 240 μmol·m-2·s-1), and were cultivated in an aeroponic system for 80 days. When stem cuttings were raised at 60 μmol·m-2·s-1 LED light intensity, the plant height was the longest, at 17.3 cm for ‘Sumi’ and 16.1 cm for ‘Chubaek’, and the number of nodes was the highest in both cultivars. The higher light intensities, produced smaller plants with fewer nodes. The leaf areas, SPAD values, and Fv/Fm values differed slightly between cultivars. The fresh weight of stem cuttings, and the production rate of healthy stem cuttings were the highest at 60 µmol·m-2·s-1. In the aeroponic system, seedlings raised at 60 μmol·m-2·s-1 with LED light intensity showed a difference between the cultivars, but the fresh weight of stems and leaves above the planting plate was the heaviest. In addition, below the planting plate the stem cuttings were longest and the root weight was heaviest at 60 μmol·m-2·s-1 LED light intensity. The number of stolons also differed between cultivars, but was greatest for seedlings raised at 60 μmol·m-2·s-1 LED light intensity, at 4.2/plant for ‘Sumi’ and 7.7/plant for ‘Chubaek’. At 60 μmol·m-2·s-1 LED light intensity, the tuber number and total tuber weight were the best, but the higher the light intensity, the smaller the total tuber number and total tuber weight for both cultivars. In conclusion, when producing potato stem cuttings for aeroponic systems using a closed-type plant production system, the most suitable LED light intensity for raising seedlings was found to be 60 μmol·m-2·s-1.

Keywords
aeroponic system
closed-type plant production system
photosynthetic photon flux density
Solanum tuberosum L.
stem cuttings, tuber, yield
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 65
  • No :4
  • Pages :468-476
  • Received Date : 2020-06-04
  • Revised Date : 2020-08-28
  • Accepted Date : 2020-09-21
  • DOI :https://doi.org/10.7740/kjcs.2020.65.4.468
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