50 public questions tagged with this topic.
Cytokinins are produced in root tips and promote cell division and shoot growth. They delay, not promote, leaf senescence.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Ethylene promotes, not inhibits, flower senescence. It is also known for fruit ripening and promoting abscission.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins primarily promote shoot growth, not root growth. They delay senescence and promote cell division.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins delay leaf senescence by mobilizing nutrients and promoting cell division.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins delay senescence by mobilizing nutrients and promoting protein synthesis.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinin promotes shoot formation; without it, shoot growth is inhibited in tissue culture.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Abscisic acid induces dormancy. Cytokinin overcomes apical dominance, while auxin promotes rooting. Ethylene accelerates senescence, not delays it.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Gibberellins can induce flowering in long-day plants even under short-day conditions by promoting stem elongation and floral initiation.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Ethylene promotes the formation of female flowers in cucumbers, thereby increasing yield.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Auxin was first isolated from human urine and is known for promoting cell elongation and apical dominance.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Auxins promote the formation of parthenocarpic fruits, such as seedless tomatoes and cucumbers.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Ethylene was identified when H.H. Cousins observed that a volatile compound from ripened oranges accelerated the ripening of bananas.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
