Gibberellins

Question 1

Gibberellins are another kind of promotory
…

Answer 1

PGR

Question 2

There are more than … gibberellins
reported from widely different organisms such
as ..nd..

Answer 2

100,
fungi and higher plants.

Question 3

They are denoted
as ..
, GA3
and so on.

Answer 3

GA1
, GA2

Question 4

However,
..was one of the first
gibberellins to be discovered and remains the
most intensively studied form.

Answer 4

Gibberellic acid (GA3)

Question 5

All GAs are ..

Answer 5

acidic

Question 6

They produce a wide range of physiological responses…. in the plants.

Answer 6

physiological responses

Question 7

Their ability to cause an … is used to increase the
length of …

Answer 7

increase in length of axis,
grapes stalks.

Question 8

Gibberellins, cause fruits like apple to ..nd..

Answer 8

elongate and improve its shape.

Question 9

They also delay senescence.

Question 10

Thus, the fruits can
be left on the tree longer so as to…

Answer 10

extend the market period.

Question 11

GA3 is used to
speed up the … process in brewing industry.

Answer 11

malting

Question 12

Sugarcane stores … as sugar in their ….

Answer 12

carbohydrate,
stems

Question 13

Spraying
sugarcane crop with gibberellins increases the length of the stem, thus
increasing the yield by as much as 20 tonnes per acre.

Question 14

Spraying juvenile conifers with GAs hastens the maturity period, thus
leading to early seed production.

Question 15

Gibberellins also promotes bolting
(internode elongation just prior to flowering) in beet, cabbages and many
plants with rosette habit.