세 가지 LED 광질이 상록바위솔 ‘블랙탑’의 생장과 엽색에 미치는 영향 = Influence of Three Types of LED Light Quality on the Growth and Leaf Color of Sempervivum ‘Black Top’

다국어 초록 (Multilingual Abstract)

The genus Sempervivum plants are members of the Crassulaceae family that is widely distributed in Eurasia and North Africa. Variousspecies in Sempervivum have shown the potential to be used as medicinal crops in several studies in the past. Nowadays, succulentsunder this genus have gained popularity as ornamental plants. To increase its ornamental value and determine proper cultivation practices,a basic investigation of indoor factors, especially on lighting conditions is deemed necessary. This study aims to determine the effectsof types of LED light qualities on the growth and leaf color of S. ‘Black Top’ (hereinafter referred to as ‘Black Top’) which couldincrease its market value. ‘Black Top’ were grown under three types of LED light qualities for indoor cultivation for 18 weeks. Resultsindicated that the tallest plants were grown under 3000 K white LED (peak 455, 600 nm) while the highest leaf length of plants wasgrown in purple LED (peak 450, 650 nm) treatments. Leaf width was not significantly affected by treatments. On the other hand, freshweight was found to be highest under 6500 K white LED (peak 450, 545 nm), while dry weight was found that 3000 K white LEDand 6500 K white LED had the same significance level. The highest chlorophyll content was taken from those grown under 6500 K white LED and the lowest in the purple LED, which suggests that balanced spectral distribution relatively produces increased chlorophyllcontent. In the analysis of CIELAB leaf color reading values, L*(color lightness) was found highest in the purple LED which suggeststhat if the spectrum was biased to one wavelength, it would produce unfavorable leaf color quality of ‘Black Top’. Based on theseresults, ‘Black Top’ are recommended to be grown under 3000 K and 6500 K white LED compared to purple LED to increase plantsizes and improve leaf color quality

국문 초록 (Abstract)

상록바위솔속(Sempervivum)은 돌나물과(Crassulaceae)에 속한 하위 속이며 유라시아와 일부 북아프리카에서 분포한다. 상록바위솔속 식물들은과거 여러 연구에서 약용작물로 활용될 수 있는 가능성을 나타내었다. 그뿐만 아니라 상록바위솔속 식물은 관상용 식물로도 선호된다. 식물의관상가치를 높이고 적합한 실내 재배조건을 확립하기 위해 적절한 광조건에 대한 연구가 필요하다. 이에 따라 본 연구에서는 시중에서 쉽게 구할수 있는 상록바위솔 ‘블랙탑’(Sempervivum ‘Black Top’)을 실험식물로 공시하였으며, 실내재배에서 세 가지 LED 광질에 따른 ‘블랙탑’의 생장에미치는 영향을 분석하기 위해 18주 이후의 생장 결과를 조사했다. 결과적으로 ‘블랙탑’의 초장은 3000 K 백색 LED (peak 455, 600 nm)에서가장 큰 것으로 나타났다. 그리고 엽장은 보라색 LED (peak 450, 650 nm)가 가장 큰 것으로 나타났다. 그러나 반대로 엽폭에서는 유의미한차이가 없는 것으로 나타났다. 한편, 생체중은 6500 K 백색 LED (peak 450, 545 nm)에서 가장 높은 것으로 나타났으며 건물중은 3000 K백색 LED와 6500 K 백색 LED가 동등한 유의수준을 가지는 것으로 나타났다. 엽록소 수치는 6500 K 백색 LED에서 가장 높게 나타났고 보라색LED에서는 가장 낮게 나타나 엽록소 수치를 증대시키기 위해서는 분광분포가 균일한 것이 좋은 것으로 나타났다. 이와 연쇄적으로 CIELAB엽색분석에서 명도를 나타내는 L*은 보라색 LED에서 가장 높게 나타나 스펙트럼이 한 쪽으로 편중될 경우 ‘블랙탑’ 엽색 품질 관리에 불리한것으로 나타났다. 결과적으로, 위 조사항목들에 대하여 복합적으로 고려할 때 ‘블랙탑’의 생장 촉진과 엽색 품질의 증대를 위해 보라색 LED가아닌 3000 K 백색 LED 혹은 6500 K의 백색 LED 하에서 재배할 것을 권고한다.

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