The auxin commonly used in promoting rooting of cuttings is

NAAM

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IBA

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NAA

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Both B and C

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Solution

The correct option is D NAA
NAA is known as naphthalene acetic acid. It is a synthetic auxin which promotes rooting in dwarf plants or stem. It also decreases the rate of senescence and abscission. It promotes respiration and increases the rate of metabolism. It also increases the sweetening in certain fruits. It is used as a weedicide for mature monocots.
So, the correct answer is option C.

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Question 30.01:

Auxins are growth hormones capable of promoting cell elongation. They have been used in horticulture to promote growth, flowering and rooting. Write a line to explain the meaning of the following terms related to auxins.
Auxins precursors

Anti-auxins

Synthetic auxins

Q. (A) Used extensively in agriculture and horticulture practice
(B) rapid cell division
(C) Initiate rooting in stem cutting
(D) Speed up malting process
(E) Promotes female flower in cucumbers
(F) Dormancy in seeds/buds.
How many function from above perform by the Auxin in plants.

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