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- W2021628841 abstract "The changes in cytoplasmic fine structure during the interval between pollination and zygotic division in the megagametophyte of Zea mays are reported. The rate of membrane synthesis appears to be low in the mature unfertilized megagametophyte. This megagametophyte is suggested to be in a state of relative metabolic inhibition. The rate of membrane synthesis is high in the zygote and free nuclear endosperm. After fertilization the swelling of the mitochondria in all cytoplasms is interpreted to reflect a presumed increase in metabolic rate relative to growth. In the zygote and endosperm, endoplasmic reticulum (ER) production is associated with the nuclear envelope. In all of the material the ribosomes not associated with the ER are helical polysomes which increase in length after fertilization. On the basis of permanganate staining, the ribonucleoprotein of the endosperm is suggested to be different from that of the other cytoplasms. The specific plastid form of each cell type does not change during the first few hours after fertilization. Dictyosomes are most numerous and active in the antipodals. They are least numerous in the egg and zygote. The smallest dictyosome vesicles are in the synergids. Dictyosome number and vesicle size increase in the egg and central cell after fertilization. Similarities among the megagametophytes of several angiosperms are enumerated." @default.
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- W2021628841 date "1968-08-01" @default.
- W2021628841 modified "2023-10-16" @default.
- W2021628841 title "FINE STRUCTURAL DEVELOPMENT OF THE MEGAGAMETOPHYTE OF ZEA MAYS FOLLOWING FERTILIZATION" @default.
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- W2021628841 doi "https://doi.org/10.1002/j.1537-2197.1968.tb07437.x" @default.
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