PLANT NUTRITION

Question 1

Water potential

Answer 1

concentration, pressure, and gravity

Question 2

Water movement

Answer 2

high to low

Question 3

turgor pressure

Answer 3

+

Question 4

Stroma

Answer 4

high evaporation, high surface tension, low water potential

Question 5

Hoagland nutrient solution

Answer 5

highest possible concentrations without producing toxicity symptoms
NH4 and NO3

Question 6

Phosphorus

Answer 6

phytate –> phytase
organic acid: malate
phosphatase

Question 7

Potassium

Answer 7

vacuole
twins with sodium (toxic)

Question 8

Cation exchange capacity

Answer 8

plants can free up and charged nutrients to secrete H+ to exchange with bound cations

Question 9

Micronutrients

Answer 9

Fe, Cl, Mn, Na
narrow optimal concentration range

Question 10

Mobile

Answer 10

N, P, K, Mg

Question 11

Fe

Answer 11

oxidzied and insoluble
citrate binds to Fe

Question 12

Iron deficiency

Answer 12

inter veinal chlorosis

Question 13

Chelation

Answer 13

the formation of bonds between two or more separate binding sites within a ligand and a single central atom

Question 14

Minerals involved in photosynthesis

Answer 14

Mn: OE complex in PSII
Fe: enzyme activity in chloroplast synthesis and electron transport in PSI
N: structure of chlorophyll
Mg: structure of chlorophyll and activation of rubisco

Question 15

Iron strategy 1

Answer 15

dicot
pea, tomato
proton pumping ATP
Fe2+

Question 16

Iron strategy 2

Answer 16

monocot
maize, rice
Fe3+

Question 17

HAK

Answer 17

high affinity K+transporter, low concentration
requires more energy

Question 18

AKT

Answer 18

low affinity K+ transporter, high concentration