02981naa a2200433 a 450000100080000000500110000800800410001902400330006010000190009324501050011226000090021730000100022652017440023665000190198065000130199965000350201265000200204765000130206765300110208065300220209165300390211365300290215270000200218170000190220170000160222070000180223670000170225470000190227170000200229070000230231070000190233370000260235270000250237870000230240370000190242670000210244570000230246677300580248920806322018-01-24       2017    bl uuuu     u00u1 u    #d7 a10.3389/fpls.2017.008652DOI1 aRIBEIRO, A. P.  aOverexpression of BdMATE gene improves aluminum tolerance in Setaria viridis.h[electronic resource]  c2017  a12 p.  aAcidic soils are distributed worldwide, predominantly in tropical and subtropical areas,reaching around 50% of the arable soil. This type of soil strongly reduces crop production, mainly because of the presence of aluminum, which has its solubility increased at low pH levels. A well-known physiological mechanism used by plants to cope with Al stress involves activation of membrane transporters responsible for organic acid anions secretion from the root apex to the rhizosphere, which chelate Al, preventing its absorption by roots. In sorghum, a membrane transporter gene belonging to multidrug and toxic compound extrusion (MATE) family was identified and characterized as an aluminum-activated citrate transporter gene responsible for Al tolerance in this crop. Setaria viridis is an emerging model for C4 species and it is an important model to validate some genes for further C4 crops transformation, such as sugarcane, maize, and wheat. In the present work, Setaria viridis was used as a model plant to overexpress a newly identified MATE gene from Brachypodium distachyon(BdMATE), closely related to SbMATE, for aluminum tolerance assays. Transgenic S. viridis plants overexpressing a BdMATE presented an improved Al tolerance phenotype, characterized by sustained root growth and exclusion of aluminum from the root apex in transgenic plants, as confirmed by hematoxylin assay. In addition, transgenic plants showed higher root citrate exudation into the rhizosphere, suggesting that Al tolerance improvement in these plants could be related to the chelation of the metal by the organic acid anion. These results suggest that BdMATE gene can be used to transform C4 crops of economic importance with improved aluminum tolerance.  aAbiotic stress  aAluminum  aGenetically modified organisms  aSetaria viridis  aAluminio  aBdMate  aHydroponic system  aOrganismo geneticamente modificado  aTolerância ao alumínio1 aSOUZA, W. R. de1 aMARTINS, P. K.1 aVINECKY, F.1 aDUARTE, K. E.1 aBASSO, M. F.1 aDIAS, B. B. A.1 aCAMPANHA, R. B.1 aOLIVEIRA, P. A. de1 aCENTENO, D. C.1 aCANÇADO, G. M. de A.1 aMAGALHÃES, J. V. de1 aSOUSA, C. A. F. de1 aANDRADE, A. C.1 aKOBAYASHI, A. K.1 aMOLINARI, H. B. C.  tFrontiers in Plant Sciencegv. 8, p. 1-12, June 2017.