Light/dark effects on PDC activity in submerged rice seedlings
Submergence tolerance of rice seedlings was assessed by Mohanty and Ong (pp. 291-300) under natural day/night conditions. Compared with pre-submergence values, the activities of pyruvate decarboxylase (PDC) extracted from roots during the night were higher than those extracted in the morning. Such increases were amplified in seedlings submerged in continuous darkness, demonstrating the incidence of tissue hypoxia or anoxia during submergence during each dark period.
