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The symptoms of (A) internal BER, (B) and (C) external BER in ripe tomato fruit, and (D) the development of the xylem network in young tomato fruit. To visualize xylem development, the dye Lucifer Yellow CH was used to stain functioning xylem in vivo (Malone and Andrews, 2001). The young tomato fruit appears to possess only two functioning xylem strands in the placental tissue.
