ATP is a universal intracellular energy and also acts as an extracellular signal substance. Extracellular ATP regulates the growth and adaptability of higher plants. Although extracellular ATP can increase free Ca2 + in plant cytoplasm, this mechanism has been unclear. Scientists at the University of Cambridge in the UK used non-damaging micro-measurement techniques and other means to study the response of Arabidopsis roots to extracellular ATP, thus revealing the mechanism of extracellular ATP. It was found that extracellular ATP caused the generation of reactive oxygen species (ROS), and the plasma membrane NADPH oxidase AtRBOHC was the main contributor to ROS. The extracellular ATP sensing site is in the plasma membrane. Extracellular ATP increases the influx of Ca2 + in the root, causing the permeability of the plasma membrane Ca2 +, activating the 19-pS channel and increasing the activity of AtrbohC NADPH oxidase. Ca2 + transduction is located downstream of ATP-activated AtRBOHC. AtRBOHC is required for ATP-induced transcription. This study shows that higher plants, although lacking purine receptor allotropes, have evolved a completely different mechanism for transmitting ATP signals on the plasma membrane. Provide us with the mechanism of how extracellular ATP affects the growth and adaptability of plants. Next, we can study the relationship between the changes of various ion currents caused by ATP and plant growth and development. The best tool for streaming. Keywords: ATP, Ca2 +, channel, MAP kinase, reactive oxygen species (ROS) References: Demidchik V et al. The Plant Journal, 2009, 58: 903–913.
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