PLANT MINERAL NUTRITION Flashcards
1
Q
Primary macronutrients
A
N, P, K
2
Q
secondary macronutrients
A
Mg, S, Ca
3
Q
micronutrients
A
Fe, Cl, Mn, Na
4
Q
very mobile
A
N, P, K, Mg
deficiency appear first in older leaves
5
Q
moderately mobile
A
S, Cu, Fe, Mn
6
Q
immobile
A
B, Ca
7
Q
Root growth
A
5.5 < pH < 7
8
Q
cation exchange capacity
A
plants can free up positively charged nutrients ti secrete H+ to exchange with bound cations
9
Q
Nitrogen
A
most abundant mineral element in a plant
10
Q
Roots take up
A
NO3- or NH4+
11
Q
ammonium , nitrate
A
most common in soil uptake
12
Q
Nitrate reductase
A
NO3 –> NO2
13
Q
Nitrite reductase
A
NO2 –> NH4
14
Q
Glutamine synthetase
A
glutamate to glutamine, ammonium is used
15
Q
GOGAT
A
glutamine to glutamate
