PLANT MINERAL NUTRITION

Question 1

Primary macronutrients

Answer 1

N, P, K

Question 2

secondary macronutrients

Answer 2

Mg, S, Ca

Question 3

micronutrients

Answer 3

Fe, Cl, Mn, Na

Question 4

very mobile

Answer 4

N, P, K, Mg
deficiency appear first in older leaves

Question 5

moderately mobile

Answer 5

S, Cu, Fe, Mn

Question 6

immobile

Answer 6

B, Ca

Question 7

Root growth

Answer 7

5.5 < pH < 7

Question 8

cation exchange capacity

Answer 8

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

Question 9

Nitrogen

Answer 9

most abundant mineral element in a plant

Question 10

Roots take up

Answer 10

NO3- or NH4+

Question 11

ammonium , nitrate

Answer 11

most common in soil uptake

Question 12

Nitrate reductase

Answer 12

NO3 –> NO2

Question 13

Nitrite reductase

Answer 13

NO2 –> NH4

Question 14

Glutamine synthetase

Answer 14

glutamate to glutamine, ammonium is used

Question 15

GOGAT

Answer 15

glutamine to glutamate

Question 16

Nitrification

Answer 16

aerobic reactions (oxidation)
ammonia –> NO2 –> NO3-

Question 17

Denitrification

Answer 17

anaerobic reactions
NO3- –> NO2- –> N2 –> NH3

Question 18

nitrogen fixation

Answer 18

N2 –> NH3

Question 19

Phosphorus

Answer 19

1st or 2nd most commonly limiting nutrient for plant growth

Question 20

AM fungi

Answer 20

facilitator for Pi uptake

Question 21

Root hair

Answer 21

extension of root epidermis cell
water and nutrient uptake

Question 22

PHT1

Answer 22

phosphate uptake and transport
mostly in roots

Question 23

PH01

Answer 23

phosphate exporter
xylem

Question 24

Phosphatase

Answer 24

Pi

Question 25

Phytase

Answer 25

phytate --> Pi

Question 26

Organic acid

Answer 26

malate

Question 27

Hoagland nutrient solution

Answer 27

highest possible nutrient concentrations without producing toxicity symptoms