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When an apical bud is removed in a plant, the lower axillary buds grow rapidly, and the plant becomes profusely branched. If the apical bud is retained, the growth of the lateral bud is suppressed. This phenomenon is called apical dominance. Apical dominance is due to the high concentration of auxins at the apex.
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Apical dominance is

The affect of apical dominance can be overcome by which of the following hormone

Knowledge Check

  • Apical dominance means

    A
    suppression of growth of apical buds by axillary buds
    B
    suppression of growth of axillary buds by the presence of apical bud
    C
    stimulation of growth of axillary buds by removal of apical bud
    D
    inhibition of growth of axillary buds by removal of apical bud

  • Apical dominance means

    A
    suppression of growth of apical buds by axillary buds
    B
    suppression of growth of axillary buds by the presence of apical bud
    C
    stimulation of growth of axillary buds by removal of apical bud
    D
    inhibition of growth of axillary buds by removal of apical bud

  • Pick out the correct statements. (i) Cytokinins specially help in delaying senescence. (ii) Auxins are involved in regulation apical dominance. (iii) Ethylene is specially useful in enhancing seed germination. (iv) Gibberellins are responsible for premature falling of leaves. Which of the above statements are correct?

    A
    (i) and (iii) only
    B
    (i) and (iv) only
    C
    (i) and (ii) only
    D
    (ii) and (iii) only

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    Assertion : Auxillary buds, in actively growing herbaceous plants, generally remain dormant Reason :This is due to apical dominance which is under the influence of auxins

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    Pick out the correct statements. (i) Cytokinins specially help in delaying senescence. (ii) Auxins are involved in regulation apical dominance. (iii) Ethylene is specially useful in enhancing seed germination. (iv) Gibberellins are responsible for premature falling of leaves. Which of the above statements are correct?

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