소귀나무 유묘의 생장, 잎 형태적 특성 및 엽록소 함량에 대한 차광 효과
Light-shading Effect on the Growth Performance, Leaf Morphological Characteristics and Chlorophyll Content of Myrica rubra Seedlings
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본 연구는 소귀나무의 가장 적절한 광 조건을 제시하고자 하였다. 차광 처리구는 0%(대조구), 35%, 50%, 75%로 구분하였고, 6개월 동안 생육시킨 후, 생장, 잎 형태 특성 및 광색소 함량을 조사하였다. 수고 상대생장율은 35% 차광 처리구에서 가장높았고, 대조구에서 가장 낮았으나 줄기와 뿌리 건중량은 대조구에서 가장 높았고, 75% 차광 처리구에서 가장 낮았다. 가지수 또한 대조구에서 가장 많았으며, 55% 차광 처리구가 가장 적었다. 소귀나무 잎은 대조구에서 가장 작고 두꺼웠으며, 잎 면적은 차광율이 증가하면서 넓어졌고, 두께는 얇아졌다. 엽록소 a, b 및 총 엽록소 함량은 35% 차광 처리구에서 가장 높았으며, 75% 차광 처리구에서 가장 낮았다. 카로테노이드 함량은 대조구에서 가장 높았으며, 75% 차광 처리구에서 가장 낮았다. 따라서, 소귀나무의 적정 광 조건은 엽록소 파괴가 적고, 줄기 생장과 생체량을 지속적으로 유지할 수 있는 35%의 차광 조건이 가장 적절한 것으로 판단된다.
Abstract
This study attempted to present the most appropriate light conditions of Myrica rubra. The light-shading treatment was divided into 0%(control), 35%, 50%, and 75%, and after growing for six months, growth performance, leaf shape characteristics, and photosynthetic pigment content were investigated. The relative growth rate of the height was the highest in the 35% light-shading treatment and the lowest in the control, but the stem and root dry weight were the highest in the control and the lowest in the 75% light-shading treatment. The number of branches was also the highest in the control, and the 55% light-shading treatment was the least. The leaves of M. rubra were the smallest and thickest in the control, and the leaf area widened with an increase in the light-shading rate, and the thickness decreased. Chlorophyll a, b, and total chlorophyll content were highest in the 35% light-shading treatment and lowest in the 75% light-shading treatment. The carotenoid content was highest in the control and lowest in the 75% light-shading treatment. Therefore, it is judged that the appropriate light conditions for the M. rubra are the most appropriate to have less chlorophyll destruction and 35% light-shading conditions that can sustain stem growth and biomass.
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