Hormonal Interactions

Question 1

receptors

Answer 1

found on plasma membranes; chemical signals binds to it and it converts into something the cell can recognize

Question 2

what binds to the receptors

Answer 2

brassinosteroids

Question 3

apical dominance

Answer 3

apical bud inhibits growth/development of axillary buds

Question 4

what happens when auxin is present

Answer 4

axillary buds are inhibited

Question 5

what does cytokinin do

Answer 5

releases the inhibition of auxin

Question 6

what does sucrose have to do with apical bud

Answer 6

apical bud is a strong sink where sucrose is directed to

Question 7

what is dormancy

Answer 7

non growth period

Question 8

what is dormancy a balance of?

Answer 8

ABA and GA

Question 9

when is GA highest

Answer 9

spring and summer

Question 10

when is ABA highest

Answer 10

fall and winter

Question 11

senescence

Answer 11

death/dying

Question 12

what happens during senescence

Answer 12

chemicals found in leaves, petals, sepals are broken down and recycled

Question 13

what is sensecence heavily dependent upon

Answer 13

ethylene

Question 14

what can delay the effects of sensecence

Answer 14

cytokinin and floralyn

Question 15

what is abscission

Answer 15

where part of the leaf falls off

Question 16

explain how abscission works

Answer 16

IAA normally passes through the leaf but becomes less and less in the fall/ if the leaf is old/ if the temp is too high

Question 17

less IAA means

Answer 17

abscission zone becomes more sensitive to ethylene

Question 18

throughout fruit ripening, what happens to hormones

Answer 18

certain ones increase and decrease at certain times

Question 19

when is starch increased and decreased during ripening

Answer 19

starch accumulation at beginning and declines during ripening