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Fluorescence images of binucleate (A, C) and trinucleate (B, D) pollen, showing variation in morphology of pollen nuclei. (A) Solanum lycopersicum; (B) Brassica napus; (C) Vicia faba; (D) Eupatorium perfoliatum. Pollen was stained with DAPI (A, C) or propidium iodide (B, D). The scale in C applies to all four images. Abbreviations: g, generative nucleus; v, vegetative nucleus; s, sperm nucleus.
