Systemic Upregulation of MTP2- and HMA2-Mediated Zn Partitioning to the Shoot Supplements Local Zn Deficiency Responses

The Plant Cell
Scott A SinclairUte Krämer

Abstract

Low bioavailable concentrations of the micronutrient zinc (Zn) limit agricultural production on 40% of cultivated land. Here, we demonstrate that plant acclimation to Zn deficiency involves systemic regulation. Physiological Zn deficiency of Arabidopsis thaliana shoots results in increased root transcript levels of the membrane transport protein-encoding genes METAL TRANSPORT PROTEIN2 (MTP2) and HEAVY METAL ATPASE2 (HMA2), which are unresponsive to the local Zn status of roots. MTP2 and HMA2 act additively in the partitioning of Zn from roots to shoots. Chimeric GFP fusion proteins of MTP2 complement an mtp2 mutant and localize in the endoplasmic reticulum (ER) membrane of the outer cell layers from elongation to root hair zone of lateral roots. MTP2 restores Zn tolerance in a hypersensitive yeast mutant. These results are consistent with cell-to-cell movement of Zn toward the root vasculature inside the ER-luminal continuum through the desmotubules of plasmodesmata, under Zn deficiency. The previously described Zn deficiency response comprises transcriptional activation of target genes, including ZINC-REGULATED TRANSPORTER IRON-REGULATED TRANSPORTER PROTEIN genes ZIP4 and ZIP9, by the F-group bZIP transcription factors bZIP19 ...Continue Reading

Citations

May 11, 2019·Functional Plant Biology : FPB·Ilya E ZlobinVladimir V Kuznetsov
Dec 22, 2019·Scientific Reports·Alice Pita-BarbosaDavid E Salt
Jul 11, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Rafael Gonçalves GindriFelipe Klein Ricachenevsky
Sep 14, 2020·Cellular and Molecular Life Sciences : CMLS·Ziqiang Patrick LiEmmanuelle M Bayer
Nov 11, 2020·Metallomics : Integrated Biometal Science·Anna Papierniak-WygladalaDanuta Maria Antosiewicz
Jan 10, 2021·Environmental Science and Pollution Research International·Xiong LiYongping Yang
Nov 9, 2020·Journal of Plant Physiology·Yaohui WangZhi Qi
Jan 19, 2021·Journal of Experimental Botany·Charlotte N Miller, Wolfgang Busch
Mar 7, 2021·Scientific Reports·Felipe K RicachenevskyMary Lou Guerinot
Mar 6, 2021·Veterinary Research·Pengpeng XiaGuoqiang Zhu
Mar 15, 2021·Plant Physiology and Biochemistry : PPB·Ilya E Zlobin
Apr 30, 2021·Journal of Plant Physiology·Houqing ZengYiyong Zhu
Jun 3, 2021·International Journal of Molecular Sciences·Karolina Maślińska-GromadkaDanuta Maria Antosiewicz
Oct 9, 2021·Plant, Cell & Environment·Dorina Podar, Frans J M Maathuis
Sep 25, 2021·The Plant Journal : for Cell and Molecular Biology·Sichul LeeMary Lou Guerinot
Nov 3, 2021·Journal of Experimental Botany·Stephan Clemens
Dec 25, 2021·Molecular Plant·Camilla StantonDorina Podar
Nov 19, 2021·Journal of Experimental Botany·Noémie Thiébaut, Marc Hanikenne
Jan 18, 2022·Plant, Cell & Environment·Sahand AminiMarc Hanikenne

❮ Previous
Next ❯

Related Concepts

Related Feeds

Actin, Myosin & Cell Movement

Contractile forces generated by the actin-myosin cytoskeleton are critical for morphogenesis, but the cellular and molecular mechanisms of contraction have been elusive for many cell shape changes and movements. Here is the latest research on the roles of actin and myosin in cell movement.