Antioxidant Defenses of Plants and Fungi

摘要: Plants face a common problem shared by all aerobic organisms. Molecular O2 is required to meet the energy demands of metabolism, but necessary presence leads multifarious risks oxidative damage due formation activated forms oxygen such as superoxide free radicals (O 2 ·− ), H2O2, and hydroxyl (·OH). The situation particularly critical in plants because not only do have tolerate atmospheric they additional burden being oxygenic, thus insuring that internal concentration remains high photosynthetic tissues. Indeed photosynthesis can be viewed very risky undertaking since large amounts are produced immediate vicinity (i.e., within chloroplasts) powerful oxidation-reduction system readily reduce O . Since derived from photosynthesis, it perhaps poetic justice organisms responsible for “polluting” atmosphere with should also at risk consequences.