Question

d) Yellowing of young leaves
a) Shortening of genetically tall plants
b) Elongation of dwarf plants
c) Promotion of rooting
Gibberellins cause:
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Answer 1

Answer:

One of the most striking effects of the gibberellins is the reversal of dwarfism in many genetically dwarf plants. Rosette plant of sugar beet, when treated with GA

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, undergoes marked longitudinal growth of axis. Similarly, dwarf pea and dwarf corn attain almost normal size when treated with gibberellins. The dwarf plants have very low GA level which appears to account for the dwarfing habit. Thus, the external supply of GA to such plants causes rapid elongation.

So the correct answer is 'Elongation of genetically dwarf plants'.

Answer 2

Explanation:

a is the answer shortening of genetically tall plants