lecture 2

Question 1

what is Ψ ?

Answer 1

water potential

Question 2

4 steps of water movement in plants

Answer 2

1. water moves from soil to root
2. water gets through the root
3. water moves up through the xylem
4. water moves from leaf to air

Question 3

what did Malpighi and Grew discover?

Answer 3

plant structures are similar to animal structures

&

Plant vascular tissue could be conducting tissues

Question 4

what did Stephen hales discover?

Answer 4

thought plants may have a heart-like structure
- bagged part of the plant and noticed transpiration
- water movement requires leaves (pulled)

Question 5

is water cohesive or adhesive?

Answer 5

cohesive

Question 6

why is water cohesive?

Answer 6

no net charge - attracts the electron of a covalent bond and hydrogen bonding

Question 7

is water a good or bad solvent?

Answer 7

excellent solvent

Question 8

can water dissociate?

Answer 8

Yes

Question 9

what does water dissociate into?

Answer 9

H+ + OH-

Question 10

does water have a high or low latent heat of vaporization?

Answer 10

high - provides thermal stability

Question 11

does water have low or high tensile strength?

Answer 11

high

Question 12

what is surface tension?

Answer 12

resistance of external force due to cohesion

Question 13

4 steps of water movement in the plant

Answer 13

1. water moves from soil to root
2. water gets through the root
3. water moves up through the xylem
4. water moves from leaf to air

Question 14

what direction does water move

Answer 14

from high to low water potential

Question 15

water potential equation (words)

Answer 15

water potential = solute potential + pressure potential + gravity potential

Question 16

solute potential formula

Answer 16

RTCs

Question 17

Pressure potential formula

Answer 17

turgor + hydrostatic pressure

Question 18

gravity potential formula

Answer 18

Pwgh

Question 19

what is influenced by water potential in the plant?

Answer 19

cell growth, photosynthesis, crop productivity