Which hormone causes stunted growth in pea?

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(D) The correct answer is $D$. Ethylene is a gaseous plant hormone that plays a significant role in plant growth and development. In many plants,inclu

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Ethylene

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(D) The correct answer is $D$. Ethylene is a gaseous plant hormone that plays a significant role in plant growth and development. In many plants,including pea seedlings,ethylene inhibits longitudinal (vertical) growth while simultaneously stimulating transverse (horizontal) growth. This effect leads to a characteristic 'stunted' or thickened appearance of the stem,which is part of the 'triple response' to ethylene.

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