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22 Cards in this Set
- Front
- Back
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This structure is protection from soil abrasion
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Root cap
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This structure has a perception of gravity
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root cap
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This structure secret mucigel, a polysaccharide
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root cap
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What does the secretion of mucigel from the root cap do?
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a.) lubricates
b.) environment stimulates bacterial growth. Nutrient stimulation |
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What are the two zones of the root cap?
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Cell division zone and elongation
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There is little absorption, root hairs, and water and mineral absorption in the zone of the root cap
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Zone of elongation
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The anatomy of root caps consits of
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-epidermis
-cortex -vascular tissues - with or without pith. |
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This is the inner most layer of the cortex
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endodermis
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closely packed, Has radial walls + Transverse walls modified, and casperian strips
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endodermis
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Casperian strips contain ____
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suberin
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This is a type of H20 movement and goes from the root hairs to the cortex
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apoplastic
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This blocks apoplastic movemnt of H20
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endodermis
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*endodermis
*active transport of ions-ATP * exclude harmful ions such as sodium and aluminum |
Symplastic
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The pericycle belongs to this core of tissues
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Vascular cylinder
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This layer of parenchyma tissue has an endogenous origin deep in the parent tissue
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pericycle
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The vascular cylinder consists of these two layers of tissues
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Pericycle and vascular tissue
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*Dicott conifer not monocot roots
*Vascular cambium * Cork cambium |
Secondary growth
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Uptake of H20 from the soil by osmosis contribute to ____ ____
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root pressure
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Driven by higher ions in roots than in soil creating pressure
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Root pressure
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Pushes water short distance. H20 is both pushed and pulled due to ____ _____
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root pressure
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What kind of roots are pandanus?
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stilt roots
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These roots pull stem into ground and serve as protection from surface fires
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contractile roots
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