Ncert Exercises & Solutions

Q.65 Define the term ‘stress’ for plants. Discuss briefly the two types of stress encountered by

plants.

Stress for plants can be defined as any external factor that negatively influences plant

growth, productivity, reproductive capacity or survival. This includes a wide range of

factors which can be broadly divided into abiotic or environmental stress factors like

salinity, extreme temperatures, drought, etc., and biotic or biological stress factors.