미세중력이 상추의 생장 및 엽록소 형광 반응에 미치는 영향

초록

As scientific interest extends beyond Earth, research on space agriculture has become essential for supporting human survival in extraterrestrial environments. This study examined the effects of altered gravity on lettuce growth and photosynthesis using a 2-D clinostat. Plants were placed at the center, 6 cm, and 12 cm from the rotation axis and compared to a control over nine days. Growth was assessed via leaf length and width, and photosynthetic responses were analyzed using OJIP chlorophyll fluorescence and photochemical indicators. While leaf length showed no significant differences, leaf width decreased significantly in the a6 and a12 groups. These groups also showed reduced photosystem II (PSII) activity and electron transport efficiency, indicating increased photosynthetic stress and decreased energy use. Elevated fluorescence at the J and P steps highlighted the photosynthetic system’s sensitivity to greater radial distances. This study offers quantitative insights into plant responses under gravity-compensated conditions and provides a foundation for optimizing space farming systems.

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