Short answerModerate1 mark
6(a)
State two functions of:
Ethylene
Topic: Functions of ethylene
Previous-year question practice database
Answer
Exam answer
- It promotes the RIPENING OF FRUITS.
- It promotes the FALLING (abscission) of leaves, flowers and fruits, and induces flowering in some plants such as pineapple.
Explanation
Ethylene is the only plant hormone that is a GAS, which explains its most familiar effects: it spreads from fruit to fruit, so one ripe fruit hastens the ripening of the rest in a basket, and one rotting fruit spoils the others.
PRACTICAL USES: bananas and mangoes are picked green, transported, and then ripened artificially with ethylene at the market. The old practice of ripening fruit in straw works because straw releases ethylene.
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