Monitoring and visualizing of PAHs into mangrove plant by two-photon laser confocal scanning microscopy

► The uptake and movement of three PAHs into Aegiceras corniculata was monitored by TPLCM. ► The PAHs were observed entering into the root and transmitting to the stem of plant. ► The pathways of the PAHs were similar and their transmission rates were different. ► The biomass of A. corniculata decreased under the pollution of the three PAHs.