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Effect of Different Light Emitting Diode (LED) Lights on the Growth Characteristics and the Phytochemical Production of Strawberry Fruits during Cultivation
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 Title & Authors
Effect of Different Light Emitting Diode (LED) Lights on the Growth Characteristics and the Phytochemical Production of Strawberry Fruits during Cultivation
Choi, Hyo Gil; Kwon, Joon Kook; Moon, Byoung Yong; Kang, Nam Jun; Park, Kyoung Sub; Cho, Myeong Whan; Kim, Young Cheol;
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 Abstract
Recent unusual weather due to global warming causes shortage of daily sunlight and constitutes one of the primary reasons for agricultural damages. LED light sources are frequently utilized to compensate for the shortage of sunlight in greenhouse agriculture. The present study is aimed at evaluating formations of phytochemicals as well as growth characteristics of mature strawberry fruits ('Daewang' cultivar) during cultivation in a closed growth chamber equipped with artificial LED light as a sole light source. Each LED light of blue (448 nm), red (634 and 661 nm) or mixed blue plus red (blue:red = 3:7) was separately supplied and the intensity of each light was adjusted to at plant level with a photoperiod consisted of 16 hours light and 8 hours darkness. Strawberries grown under mixed LED light of blue and red wavelengths showed a higher production of fruits than those grown under other LED treatments. Fructose, one of the free sugars, increased in mixed LED light-grown fruits. Anthocyanin contents were elevated remarkably in the mixed LED light-grown fruits compared with those in other LED treatments. Contrastingly, contents of total phenolics and flavonoids were not of much different from one another among the fruits treated with various LED lights. On the other hand, ripening of strawberry fruits was found to be faster when grown under blue LED light compared with other LED treatments. Moreover, antioxidant activities of blue or red LED light-grown fruits, respectively, were significantly higher than those of mixed LED light-grown fruits. We suggest that when daylight is in shortage during cultivation in a greenhouse, supplementation of sunlight with LED light, which is composed of blue and red wavelengths, could be useful for the enhancement of productivity as well as of free sugar content in strawberry fruits. In addition, for the strawberry culture in the plant factory, selective adoption of LED light wavelength would be required to accomplish the purpose of controlling fruit maturation time as well as of enhancing contents of sugars and antioxidants of fruits.
 Keywords
anthocyanin;antioxidants;flavonoids;Fragaria ananassa Duch.;sugars;
 Language
Korean
 Cited by
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저온에서 산 처리와 적색, 녹색, 청색 LED 조사의 조합에 따른 식중독 세균의 살균 효과,도정선;정현정;방우석;

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LED 광원 및 설치조건에 따른 딸기의 생육 변화,이지은;신용습;정종도;도한우;강영화;

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야간 적색 LED 처리가 'Fuji'/M.26 사과나무의 광합성, 영양생장 및 과실 품질에 미치는 영향,권헌중;박무용;송양익;강석범;사공동훈;

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