Journal of agriculture & life science (농업생명과학연구)

Institute of Agriculture & Life Science, Gyeongsang National University (경상대학교 농업생명과학연구원)
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Effect of Light-emitting Diodes on Photosynthesis and Growth of in vitro Propagation in Tea Tree (Camellia sinensis L.)

LED 광질이 차나무 기내배양묘의 생육 및 광합성에 미치는 영향

  • Received : 2019.11.24
  • Accepted : 2019.12.05
  • Published : 2019.12.31
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Abstract

The influences of light generated by LEDs on shoot growth and photosynthesis of Tea plant(Camellia sinensis L.) were evaluated. The growth characteristics were investigated after 45 days of culture under four different light qualities: fluorescent lamp, red LED, blue LED, red+blue+white LED. Shoot growth was promoted by red light, especially root length and area were further promoted under the red+blue+white LED. Also, T/R ratio and Chlorophyll content were highest in red+blue+white. Fluor Cam was used to measure the fluorescence images of the plants, inhibition of photochemical efficiency(Fv/Fm) were not changed in all treatment. However, non-photochemical quenching(NPQ) were found rapidly increasing in blue LED, these results were that blue LED were inhibit photosynthetic efficiency and must be considered for efficiently in vitro cultivation of the tea plant. The above results suggest that light qualities could be an important factor to foster in vitro growth of the species. Also, In order to produce healthy plants, it is effective to using light qualities of red+blue+white LED on in vitro culture of the tea plant. These results could be used to mass propagating shoot and produce of healthy seedling.

차나무의 기내배양 과정 중 증식배양 단계에서 LED 광질 조건에 따른 기내배양묘의 생육 특성과 광합성에 미치는 영향을 조사하였다. 광질은 적색광(R), 청색광(B), 혼합광(R+B+W)을 사용하여 처리하였고, 형광등(F)을 대조구로 하였다. 초장 생육은 적색광에서 가장 좋았으며, 특히 뿌리 생육에 있어서 혼합광은 길이와 표면적 증대에 효과적인 것으로 나타났다. 또한 T/R율, 엽록소 함량은 혼합광 처리에서 증가하는 것으로 나타났다. 엽록소 형광반응 이미지 촬영 결과 모든 처리구에서 광질에 따른 Fv/Fm의 값은 현저한 차이가 없었다. 그러나 배양묘의 NPQ는 청색광 처리에서 가장 많이 증가하여, 다른 광질과 유의적인 차이를 보였으며, 광합성 효율을 억제시키는 것으로 나타났다. 이상의 결과로 차나무 기내배양은 배양목적에 따라 광질을 선택하는 것은 매우 중요하며, 차나무 기내배양 시 건실한 식물 생산을 위해서는 혼합광 처리가 유리할 것으로 판단된다. 본 연구결과는 차나무 대량증식 및 우량묘 생산 등에 기초자료로 활용할 수 있을 것으로 판단된다.

Keywords

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