Changes in Some Enzyme Activities During Air-Drying of Excised Rice Leaves

Effect of desiccation on internal changes with respect to survival ofHydrilla verticillata

“…The decrease in catalase activity due to water stress has been reported by several authors (DWlVEDI eta/., 1979;MISHRAetaI., 1978;MUKHERJEE and CHOUDHURI, 1981). But the reports on the reaction of the peroxidase activity to water stress are ambiguous : according to some authors it increases (MALl and MEHTA, 1977;DWlVEDI et al, 1977;MUKHERJEE and CHOUDHURI, 1981), whereas according to others it decreases (TODD and YOO, 1964;MISHRA et al, 1978). In our case, the peroxidase activity was found to decrease.…”

“…In our case, the peroxidase activity was found to decrease. The lower catalase and peroxidase activities in desiccated tissues might indicate impaired oxidative process (MISHRA et al, 1978). However, in the case of these two enzymes the three different stages were not clearly d;stinguishable.…”