Ripening of fruits can be promoted by:
Correct answer: D. Ethylene gas
- A. Gibberellic acid
- B. Indole acetic acid
- C. Flsrcen
- D. Ethylene gas
Explanation
Ethylene gas is known as the 'ripening hormone' because it initiates the ripening process in fruits. It causes changes such as increased respiration rate, conversion of starches to sugars, and softening of the fruit cell walls, making the fruit sweeter and more palatable. On the other hand, gibberellic acid focuses on growth processes like stem elongation, indole acetic acid is involved in general plant growth, and 'Flsrcen' is not a valid term in plant biology.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
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About Plant Growth Regulators
Plant growth regulators are chemical messengers that control growth, development and responses to the environment. The topic covers auxins, gibberellins, cytokinins, abscisic acid and ethylene, including cell elongation, apical dominance, tropisms, seed germination, dormancy, fruit ripening and leaf fall, with growth promoters distinguished from inhibitors.
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