Question

To increase sugar production in sugarcanes, they are sprayed with____
a) IAA
b) Cytokinin
c) Gibberellin
d) Ethylene

Answer 1

Hint:The referred compound is a tetra-cyclic diterpenoid acid that is involved in the natural breakage of dormancy. This chemical compound is also essential for the germination of the seed. Additionally, it plays an important role in cell elongation. The plants lacking in this hormone are significantly dwarf in height.

Complete answer:
Sugarcanes are known to store carbohydrates in its stem. The referred compound, a tetra-cyclic diterpenoid acid, is known as gibberellins. Gibberellins are growth hormones that stimulate cell elongation and cause plants to grow taller. These plant hormones when are sprayed on the crop results in an increase in the length of the stem. This further increases the yield of sugarcane to around twenty-six tonnes/acre which is significantly high.
Gibberellins have been known to take part in different plant processes, like stem elongation, germination, flowering, and fruit ripening. The cells of a plant begin elongation upon release of gibberellins. These are liable for growth and development. Besides, they are vital for initiating seed germination.

Thus, the correct answer is an option (C).

Additional information:
Gibberellins are used by the farmers to hurry up the germination of seeds and to stimulate cell and stem elongation. These when applied outwardly to extend crop production. Gibberellins will increase the flowering of lily crop It is done by the employment of a pre-planting rootstock or tuber soak. One can soak rhizomes or tubers for ten minutes every, then plant them in the growing media.

Note: Though gibberellins are comparatively harmless to humans, however, they do have certain negative effects on numerous animal tissues. People are also exposed to residues of gibberellins through the consumption of food derived in various forms of fruits and vegetables treated with the same hormones.