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Question
Which of the following is the only gaseous plant growth regulator?
Options
ABA
Cytokinin
Ethylene
Gibberellin
Solution
Ethylene
Explanation:
It is the only gaseous growth regulator. Denny (1924) reported ethylene is effective in fruit ripening. Gane (1934) established that plants naturally synthesize ethylene.
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RELATED QUESTIONS
A higher concentration of ethylene is found in
The figure given below shows the stages of ripening in a banana. Answer the questions that follow:
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(Options: Antitranspirant, Ethylene, Auxin, ABA, Apical dominance, Gibberellins, Cytokinin, NAA.)
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| 1 | ____________ | IAA | Cell elongation |
| 2 | Auxin | IBA | ____________ |
| 3 | Stress hormone | ____________ | Delay cell division |
| 4 | ____________ | Zea tin | Cell division |
| 5 | Abscissic acid | ABA | ____________ |
| 6 | Auxin | ____________ | Flowering in pineapple |
Give a definition of the following Apical dominance.
The hormone which promotes the ripening of fruits is ______.
