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(a) Name the gaseous plant hormone. Desc...

(a) Name the gaseous plant hormone. Describe its three different actions in plants.
(b) Which hormone is known as stress hormone in plants ? Why?

Text Solution

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Ethylene is a gaseous plant hormone.
Ethylene promotes the ripening of fruits. Eg: Tomato, Apple, Mango, Ba, etc.
Ethylene inhibits the elongation of stem and root in dicots.
Ethylene hastens the senescence of leaves and flowers.
Abscisic acid increases tolerance of plants to various kinds of stress. So, it is also called as stress hormone. It is found in the chloroplast of plants.
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Knowledge Check

  • Plant hormones are:

    A
    Growth regulators
    B
    Growth promoters
    C
    Growth inhibitors
    D
    None of the above

  • Which is called stress hormone?

    A
    ABA
    B
    IPA
    C
    PAA
    D
    IAA

  • ………. is also known as stress combat hormone.

    A
    Aldosterone
    B
    Cortisol
    C
    Thymopoietin
    D
    Insulin

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