Small cut pieces of soft stems are placed in a growth medium with the following plant hormone combinations. Which combination of plant hormones will show the slowest growth?

Auxin + Cytokinin

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Gibberellins + Auxin

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Gibberellins + Cytokinin

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Abscisic Acid + Auxin

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Solution

The correct option is D Abscisic Acid + Auxin
Abscisic acid is a growth-inhibiting hormone whereas auxin, gibberellin and cytokinin are growth-promoting hormones. Options A, B, and C include all growth-promoting hormones whereas option D includes both growth-promoting and growth-inhibiting hormones. Therefore, this combination of hormones will show the slowest growth.
So, option D is the correct answer.

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Similar questions

Name the following :

(a) Hormone that stimulates growth by cell-division.

(b) Growth retarding hormone in plants.

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