The Evaluation of Uptake of Tritiated Methane to the Plants

摘要

The experiment of the exposure of tritiated methane (CH_3T) to plants was carried. Plants were put in the airtight container that CH_3T gas was added. The amount of light that it irradiated plants was changed, and the amounts of photosynthesis as the metabolic change activities of the plants were adjusted, and processes of assimilation to the plant of CH_3T were evaluated under a constant temperature. The leaves in the container and the inside gas were collected in every interval, and tritium concentrations in the samples were determined. It is observed that CH_3T concentration in the container decreased under both the light and dark conditions. On changing from dark to light condition, there was no change in the decreasing tendency of the CH_3T concentration. These show that tritiated methane would be taken in the plants without the photosynthesis process, but through the oxidation by microorganism on plants.