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Mutant stamen and pollen show defects from fluoride. A, C, and E show KI-stained pollen from heterozygote, mutant, and rescued plants, respectively. Scale bar is 10-μm. B, D, and F show stamen stained with Alexander’s stain. Viable pollen stains pink and inviable pollen stains blue/green. Scale bar is 50-μm. Each panel (A)–(F) was adjusted to give a uniform black background.
