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S. polyrhiza pollen analysis (A,B) Pollen from dehiscent anthers of strain 7498 stained with modified Alexander’s stain [52] indicating a high percentage of viability. Live pollen is pink or magenta, clear or blue stained pollen is aborted. (C) Pollen tube formation by pollen from dehisced anthers of strain 7498. (D,E) Alexander’s staining showed that anthers of strain 9509 produced viable pollen that was capable of forming pollen tubes (F).
