Plant Mineral Nutrition Ridge (2002)

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Plant Mineral Nutrition Ridge (2002)
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Radial movement of mineral nutrients in a
herbaceous root(from Ridge 2002, Figure 4.1)
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Movement of solutes from cortex to stele via the
cytoplasm of the endodermis (avoiding blockage at
the Casparian strip)(from Ridge 2002, Figure 4.2)
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A giant algal cell (Hydrodictyon) showing ion
selectivity (concentrations are mM)(from Ridge
2002, Figure 4.3)
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Model for the location and functioning of proton
pumps and transmembrane redox pumps involved in
primary active transport(from Ridge 2002, Figure
4.4)
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Ion reduction coupled to a transmembrane redox
pump(from Ridge 2002, Figure 4.5)
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Model for movement of solutes through plant
membranes. (A) proton coupled sugar uptake, (B)
activated diffusion, active transport coupled
with export of for example Na.(from Ridge 2002,
Figure 4.6)
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Model for the export of mineral nutrients via
transport proteins in the plasmamembrane of roots
(e.g. removal of unwanted sodium ions)(from
Ridge 2002, Figure 4.8)
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Model for the movement of ions into the vacuole
via transport proteins in the tonoplast of plant
cells (cations are actively transported)(from
Ridge 2002, Figure 4.9)
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A model for the export of calcium from the
cytoplasm via a primary calcium pump and to the
vacuole by secondary antiport(from Ridge 2002,
Figure 2.10)
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A model for symplastic (1) and apoplastic (2)
radial transport of ions across the root(from
Ridge 2002, Figure 4.11)
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Plate structure of clay minerals. Negatively
charged silicate layers are surrounded by cations
(H, K, Na, Ca2, Mg2).(from Ridge 2002,
Figure 4.12)
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The relationship between pH of the soil and
availability of mineral nutrients (wide bar -
more available)(from Ridge 2002, Figure 4.13)_
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Solubilization of sparingly soluble iron and
aluminium phosphate by root exudates(from Ridge
2002, Figure 4.17)
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Nutrient depletion zones(from Ridge 2002, Figure
4.20)
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Nutrient depletion zones (1 mm) for 2 mm and 4 mm
diameter roots, (a) 37.6 mm2, relative uptake
3.0, (b) 31.4 mm2, relative uptake 1.25(from
Ridge 2002, Figure 4.21)
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SEM of an ectomycorrhizal root tip between
Paxillus involutus and birch, note the fungal
hyphae form a sheath(from Ridge 2002, Figure
4.25a)
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Structure of trehalose and mannitol(from Ridge
2002, Figure 4.26)
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Diagram of a root plus nodule in longitudinal
section(from Ridge 2002, Figure 4.28b)
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Sample spectrum from x-ray microanalysis of a
section of birch root grown at elevated zinc
concentrations(from Ridge 2002, Figure 4.31)
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Sea-lavender (a) growing on a British salt marsh
and (b) a salt gland of sea lavender. Na and
Cl ions accumulate in vacuoles of collecting
cells and move by plasmodesmata to secretory
cells.(from Ridge 2002, Figure 4.36)