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In Vitro Quantum Dot LED to Inhibit the Growth of Major Pathogenic Fungi and Bacteria in Lettuce
Res. Plant Dis. 2019;25:114-123
Published online September 30, 2019
© 2019 The Korean Society of Plant Pathology.

이현구1 · 김상우1 · 마헤시 아드히카리1 · 순 쿠말 구룽1 · 세투 바지에1 · 산 꼬설1 · 권병헌1 · 주한준1 · 고영욱2 · 김용득2 · 유용환2 · 박태희2 · 신정철2 · 김민하2 · 이윤수1*

1Department of Applied Plant Sciences, Kangwon National University, Chuncheon 24341, Korea
2Cheorwon Plasma Research Institute, Cheorwon 24047, Korea
Tel: +82-33-250-6417
Fax: +82-33-243-3314
E-mail: younslee@kangwon.ac.kr
Received June 15, 2019; Revised July 4, 2019; Accepted July 5, 2019.
cc This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
QD LED has an ideal light source for growing crops and can also be used to control plant pathogenic microorganisms. The mycelial growth inhibition effect of QD LED light on Rhizoctonia solani, Phytophthora drechsleri, Sclerotinia sclerotiorum, Sclerotinia minor, Botrytis cinerea, Fusarium oxysporum, Pectobacterium carotovorum, and Xanthomonas campestris were investigated. According to the results, BLUE (450 nm) light, suppressed S. sclerotiorum by 16.7% at 50 cm height from the light source, and 94.1% mycelial growth at 30 cm height. Mycelial growth of Sclerotinia minor was inhibited by 80.4% at 50 cm height and 36.3% at 50 cm height in B. cinerea. S. minor, and B. cinerea was inhibited by 100% mycelial growth at a height of 30 cm from the light source. At 15 cm height, all three pathogens (B. cinerea, S. minor, and S. sclerotiorum) was inhibited by 100%. QD RED (M1) and QD RED (M2) light suppressed mycelial growth of S. minor and B. cinerea by 100% at 30 cm and 15 cm height from the light source. For S. sclerotiorum, QD RED (M1) and QD RED (M2) showed 75.2% and 100% inhibition, respectively. Further experiment was conducted to know the suppression effect of lights after inoculating the fungal pathogens on lettuce crop. According to the results, QD RED (M2) suppressed the S. sclerotiorum by 59.9%. In addition, Blue (450 nm), QD RED (M1), and QD RED (M2) light reduce the infestation by 59.9%. In case of B. cinerea, disease reduction was found 84% by BLUE (450 nm) light. Results suggest that the growth inhibition of mycelium increases by Quantum dot LED light.
Keywords : Inhibition, Plant pathogens, Quantum dot LED, Suppression


September 2019, 25 (3)