Still debated - not always seen. Water replaces soil air - reduces O2 diffusion. Results in fermentation. Pneumatophores, aerenchyma, lacunae, in flood-tolerant species. Increased activity of O 2 -consuming enzymes, e.g. polyphenol oxidase, peroxidase, lipoxygenase that cause browning in apples, potato etc as cutting allows them to come into contact with substrates.
Plants show both, but degree of each differs with life cycle stage.
Induced by endogenous ethylene. See pages 317-320 and Fig 11.16. See Fig 11.16. The glyoxylate can then go back to react with another acetyl-CoA. 4. Thursday May 3, MCC 2102.