摘要：SummarySensing of external mineral nutrient concentrations is essential for plants to colonize environments with a large spectrum of nutrient availability. Here, we analyzed transporter networks in computational cell biology simulations to understand better the initial steps of this sensing process. The networks analyzed were capable of translating the information of changing external nutrient concentrations into cytosolic H+and Ca2+signals, two of the most ubiquitous cellular second messengers. The concept emerging from the computational simulations was confirmed in wet-lab experiments. We document in guard cells that alterations in the external KCl concentration were translated into cytosolic H+and Ca2+transients as predicted. We show that transporter networks do not only serve their primary task of transport, but can also take on the role of a receptor without requiring conformational changes of a transporter protein. Such transceptor-like phenomena may be quite common in plants.Graphical abstractDisplay OmittedHighlights•Nutrient sensing of plants was analyzed in computational cell biology simulations•Changes in external nutrient concentrations caused cytosolic H+and Ca2+signals•Nutrient transporter networks exhibit transceptor-like characteristics•Wet-lab experiments confirmed the conceptual predictionsBiological sciences; Mathematical biosciences; Plant biology; Plant physiology; Plant nutrition
