Home
Class 11
BIOLOGY
Bolting, i.e. internode elongation just ...

Bolting, i.e. internode elongation just prior to flowering in beet, cabbage and many rosette plants, is promoted by

A

auxins

B

gibberellins

C

cytokinins

D

ethylene

Text Solution

Verified by Experts

The correct Answer is:
B
Certain plants show profuse leaf development but reduced internode growth. Such form of growth is called rosette, where a large number of broad leaves remain attached to a very short axis. Such plants exhibit excessive internode growth just before reproduction, the axis elongates 5-6 times the original height of plant and starts flowering. Stimulation in the internode growth just before reproduction is called bolting. if such plants are treated with gibberellins during conditions of rosette growth, the plants bolt and flower. Normally, bolting is favoured in nature by either cold nights or long days.
Promotional Banner

Similar Questions

Explore conceptually related problems

Consider the following statements. (i)In Gynandropsis, Passiflora , etc., thalamus is elongated and shows well developed nodes and internodes. (ii)The floral buds in Agave, Allium , etc. , may sometimes get modified into vegetative buds or bulbils. (iii)Sepals are concerned with protection of flowers in bud condition and petals help to attract insects for pollination. (iv)Stamens and carpels serve as the male and female reproductive organs respectively. Which of the following combinations of above statements provides an evidence that flower is a modified shoot ?

Functions of plant growth promoters and plant growth inhibitros are given here in a jumbled up manner. Select the option that correctly segregates these functions. (i) Cell division (ii) Cell enlargement (iii) Pattern formation (iv) Tropic growth (v) Flowering (vi) Fruiting (viii) Seed germination (viii) Response to wounding (ix) Response to stresses of biotic and abiotic origin (x) Dormancy