Mitotic activity and changes in DNA content during Zea mays L. endosperm development
2002
Kuran, H. | Marciniak, K. (Lodz University (Poland). Dept. of Plant Cytology and Cytochemistry)
Mitotic activity and nuclear DNA content in endosperm of Zea mays cv. Zlota Karlowa were examined. DNA content was cytophotometrically measured on squashed preparations after Feulgen procedure. Mitotic activity in endosperm was determinated till the stage when embryo sack reached 4,5 mm in length. Some of mitotic figures show multipled DNA content. Endosperm nuclei have various DNA contents which increase throughout endosperm development. DNA content enhancement indicates endoreduplication in progress. A conclusion has been drawn that mitotic division and the endoreduplication phase of nuclear DNA may occur simultaneously and dominate one over another at different phases of endosperm development
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