[Campbell Biology P.901] Which of the following is NOT listed as a direct effect or trigger ... | Practice Question

Which of the following is NOT listed as a direct effect or trigger of ethylene production in plants according to the text?

  • A: Fruit ripening.
  • B: Mechanical stress.
  • C: Promotion of root elongation.
  • D: Leaf abscission.

Explanation

The text states: 'Indeed, many effects previously ascribed to auxin, such as inhibition of root elongation, may be due to auxin-induced ethylene production.' This indicates that ethylene's role is in the inhibition of root elongation, not its promotion.