Which of the following plant hormones are most likely to act synergistically if expressed or applied to a drought-stricken plant?
A) auxin and ethylene
B) phytochrome and gibberellins
C) gibberellins and abscisic acid
D) abscisic acid and ethylene
E) brassinosteroids and cytokinins

Question

Quizplus · Accepted Answer

Abscisic acid and ethylene are both involved in regulating water stress responses in plants. Abscisic acid helps plants conserve water by closing stomata while ethylene stimulates the production of proteins that protect against drought. Therefore, the two hormones are likely to act synergistically to help a drought-stricken plant.

Which of the Following Plant Hormones Are Most Likely to Act