370 public questions tagged with this topic.
Cytokinins are used to delay senescence and prolong the shelf life of fruits during storage.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins, such as zeatin (found in coconut milk), promote cell division and shoot growth in tissue cultures.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins delay senescence; they do not accelerate it. Ethylene promotes senescence and abscission.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Abscisic acid (ABA) acts as a stress hormone and triggers stomatal closure to reduce water loss during drought.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid
Cytokinins delay leaf senescence (anti-aging hormone) and promote nutrient mobilization.
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
Parthenocarpy is the development of seedless fruits without fertilization. Auxins and gibberellins can induce parthenocarpy, not only cytokinins.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Auxin promotes apical dominance; it does not inhibit it. Cytokinins help overcome apical dominance.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Abscisic acid induces seed dormancy and inhibits germination. Ethylene promotes fruit ripening, and auxin suppresses lateral bud growth (apical dominance).
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
2,4-D (2,4-dichlorophenoxyacetic acid) is a synthetic auxin, not a natural one. IAA (indole-3-acetic acid) is a natural auxin.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
E. Kurosawa discovered that gibberellins from the fungus *Gibberella fujikuroi* caused abnormal elongation in rice seedlings.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
Auxin produced at the apical bud suppresses the growth of lateral buds, resulting in apical dominance.
Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Auxins and Gibberellins
