Question

Plants are generally immune to a wide variety of pathogens. This is due to

• A. The genetic constitution of the plant
• B. Resistance genes present in the plant
• C. Conducive environment for growth
• D. Less moisture in the atmosphere

Answer 1

Answer: (A), (B)

Resistance genes present in the plant

Plants are innately immune to a vast majority of bacterial and fungal pathogens. This disease resistance is basically determined by the genetic constitution of the plant. It is conferred by multiple, diverse R genes or resistance genes present in the plant. The R genes confer resistance naturally by various means. Some code for toxins that kill pathogens and some code for antimicrobial proteins.