plant hormones

Question 1

function of auxin

Answer 1

• prevent leaf drop
• stem elongation
• used as herbicide to kill weeds (promote shoot growth so stem can’t support itself and snaps off)

Question 1

function of cytokinins

Answer 1

• promotes cell division
• delays leaf senescence
• overcomes apical dominance
• promotes cell expansion

Question 2

function of giberellin

Answer 2

• promotes seed germination
• growth of stems
• speeds up process of starch into maltose during beer brewing
• stimulates growth between nodes making stems elongate

Question 3

function of abscisic acid

Answer 3

• inhibits seed germination and growth
• causes stomatal closure when plant stressed by low water availability

Question 4

function of ethene

Answer 4

• promotes fruit ripening
• promotes lateral bug growth
• fruit preservation allowing it to last longer (when removing ethene)

Question 5

function of tannins

Answer 5

• toxic to micro-organisms leading to bad taste
• prevents infiltration of lateral buds down the shoot by chemicals

Question 6

what is apical dominance?

Answer 6

inhibition of lateral bud growth down the shoot by chemicals produced by apical dominance at the tip of the plant shoot.

Question 7

what are alkaloids?

Answer 7

derived from amino acids which feed deferent to animals, tasting bitter.