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from article Cell walls (plant)
Stylized model of the plant primary cell wall, showing layers of semicrystalline cellulose microfibrils associating with cross-linking hemicellulose polymers, embedded in a pectin matrix.
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Image
from article Cell walls (plant)
Light microscopy image of the outer cell layers and cuticle of a tomato fruit. The cuticle in this organ, shown here with a red stain, forms an exceptionally thick lipid coating on the outer epidermal cell and also permeates into the underlying cell…
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from article Cell walls (plant)
Model showing the multiple layers that can be observed in some secondary cell walls, which vary in the direction that the constituent cellulose microfibrils are deposited.
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from article Cell walls (plant)
Cell expansion. (a) Two cells (left) of similar size, but different orientations of microfibril deposition show contrasting directions of cell expansion (right). (b) Model of the deposition of cellulose microfibrils by cellulose synthase complexes,…
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from article Sycamore
Leaves of the American sycamore (Platanus occidentalis). (Photo courtesy of Larry Allain, USGS National Wetlands Research Center)
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from article Bonsai
Major bonsai styles. (a) Formal upright (Chokkan); black pine. (b) Semicascade (Han-Ken-gai); wisteria. (c) Informal upright (Moyogi); juniper. (d) Cascade (Kengai); white pine. (e) Slanting (Shakan); spruce. (f) Rock clinging (Ishezuke); azalea.…
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from article Sclerenchyma
Sclerenchyma. (a) Brachysclereids (stone cells) from fruit of pear. (b) Macrosclereids (rod cells) from macerated seed coat of bean. (c) Branched sclereids from petiole of Camellia. (d) Fiberlike sclereids in cleared leaf of olive. (e) Transection…
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from article Douglas-fir
Douglas-fir (Pseudotsuga menziesii) at Junction Butte, Yellowstone National Park. (Photo courtesy of Jim Peaco, National Park Service)
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from article Douglas-fir
Cone of Douglas-fir (Pseudotsuga menziesii). (Photo courtesy of Christine Duchesne, National Park Service)
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from article Balsa
Leaves and bark of balsa (Ochroma pyramidale). (Credit: Forest and Kim Starr)
