Since 1997, my research has focused on understanding signal transduction pathways in guard cells, with particular emphasis on ion channels and ion transporters, especially plasma membrane H+-ATPases in Arabidopsis thaliana. Through various experiences in different laboratories, I have developed and integrated multidisciplinary approaches combining physiology, genetics, molecular biology, and biophysics to elucidate how guard cells transmit environmental signals into specific responses. The application of innovative approaches, such as characterizing cell type-specific gene expression, has significantly contributed to the functional analysis of ABA-regulated genes in Arabidopsis guard cells. My primary goal remains understanding plant responses to drought stress, a crucial issue linked to climate change. Through my research, my ambition is to enhance plant tolerance to drought, thereby making a significant contribution to efforts addressing the challenges posed by global warming. My in-depth expertise in ion transport has also paved the way for my research in phytoremediation.