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Flow cytometric determination of DNA amounts in embryos of fully matured dry tomato (Lycopersicon esculentum Mill.) seeds revealed mainly 2C signals. Apparently, most embryonic cells had arrested the cell cycle activity during maturation at the presynthetic G 1 phase of nuclear division. During imbibition of tomato seeds, both in water and in PEG solution, an augmentation in the 4C signal...
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