molecular biological approach for Fe-deficiency symptom of plants at high Ni soil and suppression method

点击翻译按钮获取中文摘要

In hydroponic cultures, excess Ni exposure increased Fe accumulation and the relative transcription level of AtIRT1 in roots, indicating that excess Ni induces AtIRT1 expression in roots. Moreover, Ni accumulation under Fe-deficient conditions was markedly lower in AtIRT1-defective mutants than in the wild-type, Col-0. These data demonstrate that AtIRT1 transports Ni^<2+> in roots, and strongly suggest that Ni accumulation is further accelerated by AtIRT1 that is expressed in response to excess Ni. We also investigated metal contents and their correlation of the flora of the serpentine soil area in Suga Island, Toba in Mie prefecture. Among the elements investigated, Fe concentration showed high correlation with Ni in these plants.