The difference of organophosphate esters (OPEs) uptake, translocation and accumulation mechanism between four varieties in Poaceae.

To explore variation patterns of uptake, translocation, and accumulation processes responding to organophosphate esters (OPEs) among Poaceae plants, hydroponic and computer simulation experiments were executed. Plant growth, OPEs' concentration, and bioinformation and transcript of lipid transporters in the three terrestrial barley, wheat, and maize and aquatic rice seedlings were studied after exposure to seven OPE congeners. Four types of plants could accumulate seven OPE congeners. OPEs could promote rice growth by upregulating IAA27 hormone gene. However, maize growth was inhibited due to upregulating IAA17 hormone gene. In general, OPEs with log K > 4 tended to accumulate in roots of the four types of plants. Furthermore, the uptake, translocation, and accumulation mechanism of OPEs in different plants showed species-specific, depending on chemical properties of OPEs and biological factors specifically referring to the binding ability and gene expression of lipid transporters. The uptake and accumulation of OPE in aquatic rice roots were mainly influenced by biological factors. On the contrary, terrestrial plants relied on log K more than biological factors. Meanwhile, TIL of Poaceae plants could be a common and key protein that contributed to OPEs accumulation.