Abstract:
Plants that experience drought stress protects themselves through several mechanisms namely avoidance, tolerance, recovery,
and escape. Eight varieties of yardlong bean plants were subjected to a drought stress at the rates of 50% of the field
capacity (FC) and 100% of the field capacity (FC). The results showed that yardlong bean plants possessed the mechanisms
of escape, demonstrated by the increase in Peroxidase (POX) enzyme activity. Avoidance was demonstrated by the reduced
evapotranspiration surface of the decreased leaf surface area, and the increased number of closed stomata. Tolerance was
demonstrated by the increased proline accumulation.