Identifying the spectral responses of several plant species under CO2 leakage and waterlogging stresses

These results suggest that the spectral responses of plants to CO2 leakage and waterlogging stresses are different and that the AREAred/AREAgreen and AREAred × AREAgreen indices can effectively distinguish the treated plants and the control plants, respectively. Cabbage is the most sensitive of the examined species to the CO2 leakage stress, followed by maize, beetroot and lettuce, and then bean, the least sensitive plant species. This experiment suggests that leaf reflectance can be adopted to detect plants that grow in regions of high soil CO2 leakage; moreover, the species' responses to CO2 leakage stress and waterlogging stress can be differentiated. Nevertheless, to accurately detect locations of CO2 leakage in fields and determining whether the models are suitable for airborne or satellite data, large-scale field experiments must also be performed in the near future.