ultrastructure of the egg apparatus of spinacia
Clicks: 261
ID: 156691
2014
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Abstract
The egg apparatus of Spinacia was studied from the time the embryo sac reaches its maximal size to just before fertilization, i.e., until about 8-9 hours after pollination. At maturity each synergid has a large elongated nucleus and prominent chalazal vacuoles, Numerous mitochondria, plastids, dictyosomes, free ribosomes, rough endoplasmic reticulum (RER), and lipid bodies are present. The cell wall exists only around the micropylar half of the synergids and each cell has a distinct, striated filiform apparatus. In general, degeneration of one synergid starts after pollination. The egg cell has a spherical nucleus and nucleolus and a large micropylar vacuole. Numerous mitochondria, some plastids with starch grains, dictyosomes, free ribosomes, and HER are present. A continuous cell wall is absent around the chalazal end of the egg cell.
| Reference Key |
wilms2014actaultrastructure
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|---|---|
| Authors | ;H. J. Wilms |
| Journal | our dermatol online |
| Year | 2014 |
| DOI |
10.5586/asbp.1981.024
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| URL | |
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