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Quiescence and Dormancy....

Quiescence and Dormancy.

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Plant hormone causing abscission of leaves, senescence, bud dormancy and inhibition of cell division is

Name the hormone which regulate abscission and dormancy.

Knowledge Check

  • Assertion : Kinetin is found naturally in plants. Reason : Cytokinin breaks seed and bud dormancy.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

  • Read the given statements to identify the phytohormone that performs these functions. (i) Horizontal growth of seedlings, swelling of the axis and apical hook formation in dicot seedlings. (ii) Promoting senescence and abscission of leaves and flowers. (iii) Breaking seed and bud dormancy. (iv) Initiating germination in peanut seeds. (v) Sprouting of potato tubers.

    A
    ABA
    B
    Ethylene
    C
    GA
    D
    Cytokinins

  • Read the given statements and identify the plant hormones X,Y and Z. (i) Hormone Y induces flowering in mango and also promotes rapid internode/petiole elongation in deep water rice plants and hence helping leaves or upper part of shoot to remain above water. (ii) Hormone X promotes root growth and root hair formation. (iii) Hormone Z inhibits the seed germination, increases the tolerance of plant to various stresses, play important role in seed development, maturation and dormancy.

    A
    `Y-ABA, X-"Auxin", Z-GA`
    B
    `Y-C_(2)H_(4)X - "Auxin", Z - GA`
    C
    `Y-"Auxin", X-C_(2)H_(4),Z - GA`
    D
    `Y-C_(2)H_(4),X - C_(2)H_(4),Z - ABA`

    • Similar Questions

    Explore conceptually related problems

    ABA plays an important role in seed development, maturation and dormancy.

    Mention one significant difference between dormancy and quiescence.

    Common cause of seed and bud dormancy is the presence of

    The hormone 'X' does the following functions. (i) Induces seed dormancy. (ii) Inhibits seed germination. (iii) Stimulates closureo of stomata. The hormone 'X' should be

    Read the given statements and select the option that correctly identifies the incorrect ones. (i) Cytokinin is primarily concerned with cell division. (ii) C_(2)H_(4) breaks seed and bud dormancy (iii) ABA stimulates the opening of stomata. (iv) C_(2)H_(4) initiates germination in peanut seeds, sprouting of potato tubers. (v) ABA is synergistic to GA.

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