Video - O2 and CO2 dynamics around a root of the fresh water plant; Lobelia dortmanna, during light and dark alternations@en

Video of O2 and CO2 dynamics around a root of the fresh water plant; Lobelia dortmanna, during light and dark alternations. The 2D distribution of O2 and CO2 was recorded during a dark (12h)-light (12h)-dark (12h) interval using the Planar optode system; VisiSens TD from PreSens - Precision Sensing GmbH, Regensburg, Germany. The 2D distribution of O2 and CO2 was recorded as single images at 30min intervals. Subsequently, the images were compiled to a video. The video demonstrates strong daily variation in O2 and CO2 around Lobelia dortmanna root-tips controlled by O2 release and CO2 uptake by roots during illumination of the aboveground biomass.本数据集为淡水植物多顿山梗菜（Lobelia dortmanna）单一根系周围氧气（O₂）与二氧化碳（CO₂）动态变化的影像，拍摄于明暗交替周期中。实验采用德国雷根斯堡普雷森精密传感有限公司（Precision Sensing GmbH，PreSens）的VisiSens TD型平面光极系统（Planar optode system），在暗期（12小时）-光期（12小时）-暗期（12小时）的周期内记录该植物根际的氧气与二氧化碳二维分布；实验以30分钟为间隔采集单幅图像，随后将所有图像合成为完整视频。该视频清晰展示了多顿山梗菜根尖周围氧气与二氧化碳的显著昼夜动态：当植物地上生物量处于光照条件时，根系通过释放氧气、吸收二氧化碳，驱动了根际气体分布的周期性波动。