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The R. l. bv. viciae 3841 tatC mutant exhibits anomalous infection of pea nodules. Nodules formed on pea plant roots (cv. Frisson) three weeks after inoculation with wild type R. l. bv. viciae 3841 (A, C) and the tatC mutant A1052 (B, D). A and B are images of fresh nodules, C and D were nodules preserved in 70% ethanol before staining with SYTO 13 dye. Structures of high DNA content (bacteria and plant cell nuclei) are stained yellow. The nodule tip is at the bottom.
