plant growth regulators

Question 1

auxin was isolated from

Answer 1

human urine

Question 2

auxin are produced by

Answer 2

growing apices of stems and roots

Question 3

term auxin is applied to

Answer 3

indole 3 acetic acid

Question 4

IAA,NAA,2 4 D,IBO
classify them as natural and synthetic auxin

Answer 4

indole acetic acid and indole butric acid are natural acids
napahthelene acetic acid and 24 dicholorphemoxyacetic acid

Question 6

auxin initiate what

Answer 6

rooting in stems cutting

Question 7

auxin promote

Answer 7

flowering in pineapple

Question 8

auxin prevent _____but promote____

Answer 8

fruit and leaf drop at early stages
abscission of older mature leaves and fruits

Question 9

apical dominace

Answer 9

growin apical bud inhibits growth of lateral buds

Question 10

decapitaion

Answer 10

removal of shoot tips

Question 11

decapitation results in what

Answer 11

growth of lateral buds

Question 12

auxin’s widely used in

Answer 12

tea plantation
hedge making

Question 13

parthenocary induced by

Answer 13

auixn in tomatoes

Question 14

used as herbicides?

Answer 14

auxin

Question 15

2,4D used to kill which weeds?

Answer 15

dicotlydenous weeds dont affect mature monocots

Question 16

the last 3 functions of auxin

Answer 16

prepare weed free lawn by gardeners
controls xylem diffrentiation
helps cell division

Question 17

is absisic acid plant growth promoter or inhibitor

Answer 17

inhibitor.
it inhibitor of plant metabolism

Question 18

ABA inhibits

Answer 18

seed germination

Question 19

abscisic acid was discovered for its role in regulating

Answer 19

abscission and dormancy

Question 20

ABA stimulates

Answer 20

closure of stomata and increase tolerance of plants to various kind of stress

Question 21

ABA plays imp role in which three categories

Answer 21

seed devlopment
dormancy
maturation

Question 22

why does it induce dormancy

Answer 22

aba helps seed to withstand dessication and other factores unfavorable for growth

Question 23

aba acts antagonist to

Answer 23

GA

Question 24

the gaseous pgr is

Answer 24

ethylene

Question 25

ethyelene is synthesised largely by

Answer 25

tissues undergoing sensecnece and ripening

Question 26

state the triple response effect

Answer 26

1)horizontal growth of seedling 2)swelling of axis 3)apical hook formation in DICOT seedling

Question 27

ethylene is highly effective in

Answer 27

fruit ripening

Question 28

ethylene promotes

Answer 28

senescence and absicison

Question 29

respiratory climatic

Answer 29

the rise in rate of respiration ethylene enhances respiration rate during fruit ripening

Question 30

ethyelene promotes rapid what

Answer 30

internode and node elongation petiole elonagation in deep water rice plants

Question 31

which pgr is used for: to initiate flowering to promote flowering

Answer 31

a)ethylene b)auxin

Question 32

ethylene initaiates flowering in which 2 fruits

Answer 32

mango and pinapple

Question 33

how many gibberlin are reported

Answer 33

more than 100

Question 34

how were cytokinin discovered

Answer 34

kinetin from autoclaved herring of sperm dna

Question 35

the most widely used pgr in agriculture is

Answer 35

eythelen

Question 35

the most widely used compound as source of ethyelen is

Answer 35

ethepon

Question 36

widely used ga

Answer 36

GA3

Question 37

pgr used in elonagtion of food and to improve its shape

Answer 37

gibberelin

Question 38

ethepon helps in

Answer 38

fruit ripening tomatoes and apples accelerates abscission in flowers and fruits (thining of cotton cherry walnut)

Question 39

ethylene initaies seed germination in

Answer 39

peanut seeds sprouting of potato tuber

Question 40

all gs are acidic basic

Answer 40

acidic

Question 41

the ability to cause increase in grape stalks

Answer 41

gibberelins

Question 41

bolting is and shown by

Answer 41

internode elongation prior to seed production ga

Question 42

which pgr breaks seed and bud dormancy

Answer 42

ethyelene

Question 43

feminising effect in cucumber

Answer 43

ethylene

Question 44

which pgr delay sensence so that they can be left on tree for longer time

Answer 44

gibberlin

Question 45

what is ethepon

Answer 45

ethepon is an aqueous solution readily absorbed and transported within plants and released slowly

Question 46

sugarcane stores carbohydrates as sugar where

Answer 46

stem

Question 47

ga produce bolting in?

Answer 47

beet cabage many plants with rossete habbitat

Question 48

does kinetin occur naturally in plants

Answer 48

oh no hehe

Question 49

which pfr used to speed up malting process in brewing industry

Answer 49

gibberlein

Question 51

whihc pgr is supposeed to be used to hasten maturity period leading to early seed production

Answer 51

GA