PLANT HORMONES

Gibberellins cause

• Shortening of genetically tall plants

• Elongation of dwarf plants

• Promotion of rooting

• Yellowing of young leaves

The hormone which has positive effect on

apical dominance is

• Cytokinin

• Auxin

• Gibberellin

• Ethylene

Which one of the following hormones is

naturally not found in plants

• 2, 4-D

• GA3

• Gibberellin

• IAA

Avena coleoptile test was conducted by

• Darwin

• N. Smit

• Paal

• F.W. Went

To increase the sugar production in

sugarcanes they are sprayed with _______

• Auxin

• Cytokinin

• Gibberellins

• Ethylene

_________ causes cell elongation, apical

dominance and prevents abscission.

• Auxin

• Cytokinin

• Gibberellin

• Ethylene

_________ is a gaseous hormone involved in abscission of organs and acceleration of fruit ripening.

• Cytokinin

• Auxin

• Gibberellin

• Ethylene

Gibberellins induce stem elongation in _________ plants.

• Rosette

• Tall

• Mango

• Tomato

The hormone which has negative effect on apical dominance is _________.

• Cytokinin

• Auxin

• Gibberellin

• Ethylene

Auxin

• Coleoptile tip &

  Apical dominance

• Fruits &

  Ripening

• Chloroplast &

  Abscission

• Coconut milk &

  Cell division

• Gibberella

  fujikuroi &

  Internodal

  elongation