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  4. Which one of the following plant function is not controlled by auxins?

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Q. Which one of the following plant function is not controlled by auxins?

AMUAMU 2010Plant Growth and Development

Solution:

Auxins are plant hormones. The most important auxin produced by plants is indole-$3$-acetic acid $(IAA)$.
It plays important roles in a number of plant activities, including
(i) Development of the embryo
(ii) Leaf formation
(iii) Phototropism
(iv) Gravitropism
(v) Apical dominance
(vi) Fruit development
(vii) Abscission
(viii) Root initiation and development
(ix) The shade-avoidance effect