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Fig. 1. Expression pattern of cell type-specific promoters used to drive multi-targeted amiRNA libraries. A) Shown are confocal or stereoscope images for pML1:H2B-GFP (shoot epidermis), pIQD22:GUS-mCitrine (palisade mesophyll), pSCR:YFP (endodermis and bundle sheath), pSUC2:YFP (phloem companion cells), pCORI3:GUS-mCitrine (spongy mesophyll), pKST1:GFP (guard cells), pS18:YFP (xylem), pPGP4:NLS-YFP (root epidermis and cortex), pCO2:YFP (cortex), pUBQ10:YFP (constitutive), pSIG6:GUS (shoot), and pARSK1:GUS (root). Red signal indicates cell wall dye propidium iodide. Blue signal in pIQD22 and pCORI3 indicates chlorophyll auto-fluorescence. pML1, pSCR, pSUC2, pKST1, pS18, pPGP4, pCO2, and pUBQ10 seedlings are 5 days old, pSIG6 and pARSK1 seedlings are 12 days old, and pIQD22 and pCORI3 are 17 days old. Scale bars = 50 µm for pML1, pIQD22, pSCR, pSUC2, pCORI3, pKST1, pS18, pPGP4, pCO2, and pUBQ10; scale bar = 1 mm for pARSK1; and scale bar = 2 mm for pSIG6. B) Illustrations of the cell type-specific expression patterns driven by promoters used in this study to drive multi-targeted amiRNA expression. Illustrations are of leaf tissue (upper left), root cross-section (lower left), root tip (center) and whole plant (right).

mTACT: A cell type-specific transportome-scale amiRNA toolbox to overcome functional redundancy in Arabidopsis 

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Moran Anfang, Shir Ben Yaakov, Ning Su, Anat Shafir, Jenia Binenbaum, Reem Haj Yahya, Xikai Yu, Carl Procko, Hamtual Bar, Joanne Chory, Julian I Schroeder, Yosef Fichman, Itay Mayrose, Eilon Shani, Yuqin Zhang, mTACT: A cell type-specific transportome-scale amiRNA toolbox to overcome functional redundancy in Arabidopsis, Plant Physiology, 2025;, kiaf682, https://doi.org/10.1093/plphys/kiaf682
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