18 Questions
Which hormone is responsible for promoting bolting in beet, cabbages, and plants with rosette habit?
Gibberellins
What effect does Gibberellic acid (GA3) have on lateral buds after the apical bud is removed from a plant?
Stimulates their growth
What role do Gibberellins play in apple fruit development?
Promote elongation
Which hormone is used to increase the length of grape stalks?
Gibberellins
What is the main effect of spraying juvenile conifers with Gibberellins?
Hastened maturity period leading to early seed production
Which hormone is involved in delaying senescence of fruits?
Gibberellins
What is the effect of spraying sugarcane crops with Gibberellins?
Increases stem length and yield per acre
Which hormone plays a crucial role in malting process in the brewing industry?
Gibberellins
Which plant growth regulator is known to be mainly involved in promoting cell division and cell enlargement?
Auxins
Among the plant growth regulators, which one is considered a growth inhibitor and plays a role in dormancy and abscission?
Abscisic acid
Which plant growth regulator, classified as a growth promoter, is involved in flowering, fruiting, and seed formation?
Gibberellins
Which plant growth regulator is accidentally discovered by Charles Darwin and his son Francis Darwin during their observations on phototropism?
Auxins
Among the plant growth regulators, which one acts mainly as an inhibitor of growth activities?
Ethylene
What was the site of transmittable influence that caused the bending of the entire coleoptile?
Tip of coleoptile
Which substance was identified as the cause of the 'bakane' (foolish seedling) disease of rice seedlings?
Gibberellin
What substance was released from ripened oranges that hastened the ripening of stored unripened bananas?
Ethylene
Which hormone was chemically characterized as inhibitor-B, abscission II, and dormin initially before being identified as a single compound?
Abscisic Acid
From which part of tobacco stems did callus proliferate only when supplemented with auxins and specific nutrients?
Internodal segments
Test your knowledge on auxins like IAA, IBA, NAA, and 2,4-D and their applications in agricultural and horticultural practices. Learn how auxins help in rooting stem cuttings, promoting flowering, and regulating fruit and leaf drop.
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