Which of the following would only be activated or upregulated after a plant has already been infected by a pathogen?
A) phytochrome
B) salicylic acid
C) molecular chaperones
D) stress proteins

Question

Quizplus · Accepted Answer

Salicylic acid is a signaling molecule that is specifically produced by plants in response to pathogen infection, so it would only be upregulated after the plant has been infected. Phytochrome, molecular chaperones, and stress proteins can all be upregulated in response to a variety of stimuli, not just pathogen infection.

Which of the Following Would Only Be Activated or Upregulated