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PIN FORMED 2 Modulates the Transport of Arsenite in Arabidopsis thaliana

Plant Communications 2020年第3期1卷 42-56页

作者： Mohammad Arif Ashraf Kana Umetsu Olena Ponomarenko Michiko Saito Mohammad Aslam Olga Antipova Natalia Dolgova Cheyenne D.Kiani susan nehzati Keitaro Tanoi Katsuyuki Minegishi Kotaro Nagatsu Takehiro Kamiya Toru Fujiwara Christian Luschnig Karen Tanino Ingrid Pickering Graham N.George Abidur Rahman United Graduate School of Agricultural Sciences Iwate UniversityMoriokaIwateJapan Department of Plant Bio Sciences Faculty of AgricultureIwate UniversityMoriokaIwateJapan Molecular and Environmental Science Research Group Department of Geological SciencesUniversity of SaskatchewanSaskatoonSKCanada Argonne National Lab Advanced Photon SourceXSD-MICLemontILUSA Isotope Facility for Agricultural Education and Research Graduate School of Agricultural and Life SciencesThe University of TokyoBunkyo-kuTokyoJapan Department of Radiopharmaceuticals Development National Institute of Radiological SciencesNational Institutes for Quantum and Radiological Science and TechnologyInageChibaJapan Department of Applied Biological Chemistry Graduate School of Agricultural and Life SciencesThe University of TokyoBunkyo-kuTokyoJapan Department of Applied Genetics and Cell Biology University of Natural Resources and Life SciencesVienna(BOKU)Muthgasse 181180 WienAustria Department of Plant Sciences College of Agriculture and BioresourcesUniversity of SaskatchewanSaskatoonSKCanada Agri-Innovation Center Iwate UniversityMoriokaIwateJapan

Arsenic contamination is a major environmental issue,as it may lead to serious health *** reduced trivalent formof inorganic arsenic,arsenite,is in generalmore toxic to plants comparedwith the fully oxidized pentavalent *** arsenite inplants hasbeenshown tobemediatedthrough a large subfamily of plant aquaglyceroporins,nodulin 26-like intrinsic proteins(NIPs).However,the efflux mechanisms,as well as themechanismof arsenite-induced root growth inhibition,remain poorly *** physiology,synchrotron imaging,and root transport assay approaches,we show that the cellular transport of trivalent arsenicals inArabidopsis thalianais stronglymodulatedbyPINFORMED2(PIN2)auxin efflux *** transport assay using radioactive arsenite,X-ray fluorescence imaging(XFI)coupled with X-ray absorption spectroscopy(XAS),and inductively coupled plasma mass spectrometry analysis revealed that pin2 plants accumulate higher concentrations of arsenite in roots comparedwith the *** the cellular level,arsenite specifically targets intracellular sorting of PIN2 and thereby alters the cellular auxin ***,loss of PIN2 function results in arsenite hypersensitivity in *** coupled with XAS further revealed that loss of PIN2 function results in specific accumulation of arsenical species,but not the other metals such as iron,zinc,or calcium in the root ***,these results suggest that PIN2 likely functions as an arsenite efflux transporter for the distribution of arsenical species in planta.

关键词： auxin arsenite PIN2 trafficking transport

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