Lecture 11 - Plant Mineral Nutrient 2

Question 1

what do membrane transporters facilitate

Answer 1

nutrient uptake

Question 2

vascular plants assimilate mineral nutrients mostly via _____

Answer 2

roots

Question 3

what is the most abundant mineral element in the earths atmosphere and in a plant

Answer 3

Nitrogen

Question 4

what carbon compounds is N a part of

Answer 4

amino acids, nucleic acids, and chlorophyll

Question 5

symptoms of N deficiency

Answer 5

• plant stunting
• yellowing due to lack of chlorophyll
• older tissues are affected first

Question 6

why is nitrogen an essential element

Answer 6

• forms linkage between amino acids via peptide bonds to make complex proteins
• fundamental to chemical structure of DNA and RNA

Question 7

forms of N that plants can take up

Answer 7

Nitrate (NO3) and ammonia (NH3)

Question 8

what do ammonium and nitrate promote in plants

Answer 8

promote inorganic cations and anions to balance in plants and create stable pH conditions

Question 9

what does HATS stand for

Answer 9

high affinity transporters

Question 10

what does LATS stand for

Answer 10

low affinity transporters

Question 11

what does AMT stand for

Answer 11

ammonium transporter

Question 12

what does NRT stand for

Answer 12

Nitrate transporter

Question 13

assimilation

Answer 13

incorporation of inorganic nutrients into organic substances

Question 14

NO3 is reduced to ______ prior to assimilation

Answer 14

NH4

Question 15

what does GS/GOGAT do

Answer 15

assimilates inorganic nitrogen into organic molecules

Question 16

how do legumes fix N

Answer 16

via soil bacteria called rhizobia that are in nodules on their roots

Question 17

many processes are required for ________, _________, and ________ (about nutrients)

Answer 17

nutrient uptake, assimilation, and utilization

Question 18

nitrogen cycle

Answer 18

nitrification, denitrification, nitrogen fixation

Question 19

nitrogen metabolism

Answer 19

uptake, assimilation, and remobilization