F ... 26 - Plant Nutrition

Question 1

plants need ___ to grow.

Answer 1

light
water
nutrients

Question 2

how do plants acquire most elements?

Answer 2

absorbed as inorganic ions from soil

Question 3

how many essential elements?

Answer 3

17

Question 4

what makes an element essential?

Answer 4

needed to complete life cycle

lack thereof = deficiencies

Question 5

macronutrients

Answer 5

C O H
N P K
Mg Ca S

Question 6

micronutrients

Answer 6

Mo Fe B Cl Zn Cu Mn Ni

Question 7

C, O, H compose how much needed elements?

Answer 7

95%

Question 8

Function of C, O, H

Answer 8

organic processes

Question 9

Function of N

Answer 9

amino acids, proteins, nucleic acids, chlorophylls, etc…

Question 10

Function of K

Answer 10

ion balance, stomata control

Question 11

Function of Ca

Answer 11

cell wall components

Question 12

Function of Mg

Answer 12

chlorophyll cofactor

Question 13

Function of P

Answer 13

ATP, ADP

Question 14

Function of S

Answer 14

amino acids, proteins

Question 15

phytoremediation

Answer 15

extraction of specific element from soil into plant, can then be removed
“cleaning” soil

Question 16

Availability of nutrients in the soil is greatly affected by what?

Answer 16

soil pH

Question 17

95% N in soil is ___

Answer 17

organic (unavailable, must be broken down by bacteria)

[ NH4+, NO3-]

Question 18

major uptake of nutrients occurs where?

Answer 18

roots!

Question 19

how does nutrient uptake through roots occur?

Answer 19

diffusion

incr. root area = incr. uptake

Question 20

Plants can increase uptake by…

Answer 20

increasing root length

increasing root surface area

Question 21

means to increase root surface area

Answer 21

mycorrhiza
nodules
root hairs

Question 22

mycorrhiza

Answer 22

mutually beneficial association bt fungus and root

Question 23

nodule

Answer 23

small swelling on legume root, N-fixing bacteria