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Question
Which of the following plant hormones are synthetic?
Which of the following plant hormones are synthetic?
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Solution
The correct option is A 2, 4-D
The four naturally occurring (endogenous) auxins are IAA, 4-chloroindole-3-acetic acid, phenylacetic acid, and indole-3-butyric acid; only these four are found to be synthesized by plants. Alongside endogenous auxins, scientists and manufacturers have developed many synthetic compounds with auxinic activity. Synthetic auxin analogs include 1-naphthaleneacetic acid, 2,4-dichlorophenoxyacetic acid (2,4-D) and many others. Some synthetic auxins, such as 2,4-D and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), are used as herbicides.
The four naturally occurring (endogenous) auxins are IAA, 4-chloroindole-3-acetic acid, phenylacetic acid, and indole-3-butyric acid; only these four are found to be synthesized by plants. Alongside endogenous auxins, scientists and manufacturers have developed many synthetic compounds with auxinic activity. Synthetic auxin analogs include 1-naphthaleneacetic acid, 2,4-dichlorophenoxyacetic acid (2,4-D) and many others. Some synthetic auxins, such as 2,4-D and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), are used as herbicides.
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