[Campbell Biology P.916] What is the primary function of the hypersensitive response HR in p... | Practice Question

What is the primary function of the hypersensitive response HR in plants?

  • A: To promote nutrient uptake in infected areas.
  • B: To facilitate the spread of pathogens throughout the plant.
  • C: To isolate the pathogen by localizing infection and depriving it of nutrients.
  • D: To stimulate rapid growth in remote, uninfected parts of the plant.

Explanation

The hypersensitive response HR is a localized defense mechanism where infected cells produce antimicrobial molecules, seal off infected areas, and self-destruct to form lesions. This action isolates the pathogen and deprives it of nutrients, preventing systemic spread.