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- W4255606987 abstract "Quiescent and germinated pollen grains of Parkinsonia aculeata, Hymenocallis occidentalis, Hippeastrum belladonna, and Ranunculus macranthus were studied electron microscopically following KMnO4-fixation, and comparisons between the 2 developmental stages were made. In the process of germination, mitochondrial structure characteristically remains unchanged from the quiescent stage form, while other organelles undergo significant modifications. In all 4 species, the Golgi apparatus becomes secretory, producing large vesicles which migrate to the cell surface and contribute substrate(s) to the forming pollen tube wall. In Hymenocallis and Hippeastrum, plastids initiate starch storage only after germination begins; this appears to involve an increase in plastid lamellae. Vacuoles arise in germinating pollen of P. aculeata from elements of the ER, while in the other 3 species vacuoles develop from “prevacuolar bodies.” Generative cell structure, vegetative nuclear structure and a unique plasma membrane-ER relationship in H. belladonna are briefly described." @default.
- W4255606987 created "2022-05-12" @default.
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- W4255606987 date "1965-02-01" @default.
- W4255606987 modified "2023-10-16" @default.
- W4255606987 title "Fine-Structural Changes in the Cytoplasm of Germinating Pollen" @default.
- W4255606987 doi "https://doi.org/10.2307/2440229" @default.
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