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Plants: Phenomenal Hydraulic Engineers

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Questions and Answers

What is water potential?

A measure of the kinetic energy in water

A measure of the density of water

A measure of the potential energy in water (correct)

A measure of the volume of water

How is water potential denoted?

Ψ (psi) (correct)

P (pascal)

E (energy)

V (volume)

What influences the water potential in plant solutions?

Solute concentration and matrix effects (correct)

Temperature and color

Density and volume

Pressure and gravity

Why is the water potential of pure water designated as zero?

For convenience of definition Signup and view all the answers

In what units is water potential expressed?

Megapascals (MPa) Signup and view all the answers

What allows plants to achieve hydraulic feats like moving water to great heights and splitting rocks?

Water potential and hydraulics Signup and view all the answers

What are the components that make up the total water potential of a system?

Solute, pressure, gravity, and matric potentials Signup and view all the answers

What is the role of solutes in reducing water potential in a plant cell?

Solutes decrease water potential by consuming potential energy Signup and view all the answers

How does solute concentration affect solute potential in a plant cell?

Increasing solute concentration decreases solute potential Signup and view all the answers

In which direction does water move in relation to solute potential gradient?

Towards areas of lower solute potential Signup and view all the answers

What happens to the total water potential when solute potential decreases?

Total water potential decreases Signup and view all the answers

How do solutes affect the available potential energy in an aqueous system?

Solutes decrease the available potential energy Signup and view all the answers