Fourth, the activity of ascorbic acid oxidase in leaf and root were enhanced. The peroxidase activity in leaf was enhanced too.

Under water defficiency stress, activities of SOD and POD and content of MDA in leaves, shoot tips and active roots of 5 2-month-old loquat seedlings were measured.

Using water proof installations, a systematic study was conducted determine the effects of water stress on the protective enzyme activities and lipid peroxidation were determined.