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With reference to Plant hormones consider the following statements.
Cytokinins influence cell division and shoot formation.
Auxins promote root initiation and flowering in plants.
Gibberellins inhibit root growth and promote leaf abscission.
Which of the statements given above is/are correct?
- a)1 and 2 only
- b)2 and 3 only
- c)1 and 3 only
- d)1, 2 and 3
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
With reference to Plant hormones consider the following statements. ...
Statement 1 is correct: Cytokinins influence cell division and shoot formation. Cytokinins have specific effects on cytokinesis, and were discovered as kinetin (a modified form of adenine, a purine) from the autoclaved herring sperm DNA. Kinetin does not occur naturally in plants. Since the discovery of zeatin, several naturally occurring cytokinins, and some synthetic compounds with cell division promoting activity, have been identified. Natural cytokinins are synthesised in regions where rapid cell division occurs, for example, root apices, developing shoot buds, young fruits etc. It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation. Cytokinins help overcome the apical dominance.
Statement 2 is correct: Auxins help to initiate rooting in stem cuttings, an application widely used for plant propagation. Auxins promote flowering e.g. in pineapples. They help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits.
Statement 3 is incorrect: Gibberellins are another kind of promotery plant growth regulators (PGRs). There are more than 100 gibberellins reported from widely different organisms such as fungi and higher plants Sugarcane stores carbohydrate as sugar in their stems. Spraying sugarcane crops with gibberellins increases the length of the stem, thus increasing the yield by as much as 20 tonnes per acre. Gibberellins also promotes bolting (internode elongation just prior to flowering) in beet, cabbages and many plants with rosette habit.
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With reference to Plant hormones consider the following statements. Cytokinins influence cell division and shoot formation. Auxins promote root initiation and flowering in plants. Gibberellins inhibit root growth and promote leaf abscission. Which of the statements given above is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?
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With reference to Plant hormones consider the following statements. Cytokinins influence cell division and shoot formation. Auxins promote root initiation and flowering in plants. Gibberellins inhibit root growth and promote leaf abscission. Which of the statements given above is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about With reference to Plant hormones consider the following statements. Cytokinins influence cell division and shoot formation. Auxins promote root initiation and flowering in plants. Gibberellins inhibit root growth and promote leaf abscission. Which of the statements given above is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to Plant hormones consider the following statements. Cytokinins influence cell division and shoot formation. Auxins promote root initiation and flowering in plants. Gibberellins inhibit root growth and promote leaf abscission. Which of the statements given above is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?.
With reference to Plant hormones consider the following statements. Cytokinins influence cell division and shoot formation. Auxins promote root initiation and flowering in plants. Gibberellins inhibit root growth and promote leaf abscission. Which of the statements given above is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about With reference to Plant hormones consider the following statements. Cytokinins influence cell division and shoot formation. Auxins promote root initiation and flowering in plants. Gibberellins inhibit root growth and promote leaf abscission. Which of the statements given above is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to Plant hormones consider the following statements. Cytokinins influence cell division and shoot formation. Auxins promote root initiation and flowering in plants. Gibberellins inhibit root growth and promote leaf abscission. Which of the statements given above is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?.
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