Hachi's posts
Posted in it's literally just biology
Posted 6 years ago
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Tracheids and vessel elements are dead and have no cytoplasm, and sieve-tube elements have no organelles → increases bulk flow rate
Tracheids and vessel elements are dead and have no cytoplasm, and sieve-tube elements have no organelles → increases bulk flow rate
Posted in it's literally just biology
Posted 6 years ago
★
Occurs within tracheids and vessel elements (xylem) and sieve-tube elements (phloem)
Occurs within tracheids and vessel elements (xylem) and sieve-tube elements (phloem)
Posted in it's literally just biology
Posted 6 years ago
★
High → low pressure. Independent of solute concentration
High → low pressure. Independent of solute concentration
Posted in it's literally just biology
Posted 6 years ago
★
Long-distance bulk flow - movement of liquid in response to a pressure gradient
Long-distance bulk flow - movement of liquid in response to a pressure gradient
Posted in it's literally just biology
Posted 6 years ago
★
Diffusion is good enough for cells, but too slow for long-distance transport in a plant
Diffusion is good enough for cells, but too slow for long-distance transport in a plant
Posted in it's literally just biology
Posted 6 years ago
★
Permeability↓ when cytosolic Ca2+↑ or cytosolic pH↓
Permeability↓ when cytosolic Ca2+↑ or cytosolic pH↓
Posted in it's literally just biology
Posted 6 years ago
★
Can open/close, affect the rate at which water moves osmotically
Can open/close, affect the rate at which water moves osmotically
Posted in it's literally just biology
Posted 6 years ago
★
Aquaporins (proteins) facilitate transport of water molecules across plant cell plasma membranes
Aquaporins (proteins) facilitate transport of water molecules across plant cell plasma membranes
Posted in it's literally just biology
Posted 6 years ago
★
Water molecules are small enough to diffuse across phospholipid bilayer
Water molecules are small enough to diffuse across phospholipid bilayer
Posted in it's literally just biology
Posted 6 years ago
★
When ѰP and ѰS offset each other, Ѱ = 0 → equilibrium, no net movement of water
When ѰP and ѰS offset each other, Ѱ = 0 → equilibrium, no net movement of water
Posted in it's literally just biology
Posted 6 years ago
★
In pure water (Ѱ = 0 MPa) → water enters cell by osmosis (due to higher solute concentration in cell) → cell swells, wall exerts turgor pressure (ѰP↑)
In pure water (Ѱ = 0 MPa) → water enters cell by osmosis (due to higher solute concentration in cell) → cell swells, wall exerts turgor pressure (ѰP↑)
Posted in it's literally just biology
Posted 6 years ago
★
In water with high solute concentration (ѰS << 0) → water diffuses out of cell → plasmolysis
In water with high solute concentration (ѰS << 0) → water diffuses out of cell → plasmolysis
Posted in it's literally just biology
Posted 6 years ago
★
Consider: flaccid cells with ѰP = 0 MPa and ѰS < 0 (has solutes)
Consider: flaccid cells with ѰP = 0 MPa and ѰS < 0 (has solutes)
Posted in it's literally just biology
Posted 6 years ago
★
Turgor loss → wilting, leaves/stems droop due to water loss
Turgor loss → wilting, leaves/stems droop due to water loss