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- W4232474555 abstract "The root meristem of E. monosperma and E. chilensis possesses a central group of distinctive, large cells. These cells have large nuclei with scattered heterochromatin, proplastids with no starch, small vacuoles, mitochondria, few dictyosomes and endoplasmic reticulum cisternae, and lipid deposits. Over a 24 hr labelling period, the large cells fail to incorporate 3H-thymidine, whereas cells both distal and proximal to this region do. A quiescent center which includes these large cells is present therefore. Both species have an extensive root cap, the length being contributed by mitoses in many tiers of cells distal to the quiescent center. The root cap consists of a columella and peripheral regions. Distinctive amyloplasts, an increase in the number of endoplasmic reticulum cisternae and dictyosomes, large vacuoles, and lipid deposits are characteristic of differentiated columella cells. Peripheral cells elongate, lose most of their starch, and are eventually sloughed from the root." @default.
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- W4232474555 date "1980-05-01" @default.
- W4232474555 modified "2023-10-14" @default.
- W4232474555 title "Root Apex Structure in Ephedra Monosperma and Ephedra Chilensis (Ephedraceae)" @default.
- W4232474555 doi "https://doi.org/10.2307/2442673" @default.
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