sentence: High levels of ions in soil can cause increased turnover through endocytosis of various plasma membrane-localized ion channels , including the boric transporter BOR1 ( require high boron1 ) [ 45 ] , the iron transporter IRT1 ( iron-regulated transporter 1 ) [ 26,27 ] , the phosphate transporters PHTs [ 46 ] , and the nitrate transporter NRT1.7 [ 47 ] .