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Pollen development from tetrad stage to mature pollen stage. Days before anthesis related to developmental stages are based on Lycopersicon esculentum Mill. “Trust” from [32] and [33]. A, anthesis, A-3, 3 days before anthesis, A-5, 5 days before anthesis, A-7, 7 days before anthesis, A-9, 9 days before anthesis. Nuclei are stained with DAPI.
