Oxygen effects on maize leaf superoxide dismutase and glutathione reductase

Exposure of maize seedlings to an atmosphere containing 75% O 2 and 350 ppm CO 2 resulted in a two- to three-fold increase in glutathione reductase activity in leaf tissue within 48 hr after initiation of the O 2 treatment. This elevated level of glutathione reductase was still evident in plants mai...

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Bibliographic Details
Published inPhytochemistry (Oxford) Vol. 21; no. 7; pp. 1527 - 1532
Main Authors Foster, Joyce G., Hess, John L.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 1982
Subjects
enzyme activity
glutathione reductase
Gramineae
hyperoxia
maize
superoxide dismutase
Zea mays
Zea mays
hyperoxia
Gramineae
enzyme activity
superoxide dismutase
SOD
glutathione reductase
maize
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Summary:Exposure of maize seedlings to an atmosphere containing 75% O 2 and 350 ppm CO 2 resulted in a two- to three-fold increase in glutathione reductase activity in leaf tissue within 48 hr after initiation of the O 2 treatment. This elevated level of glutathione reductase was still evident in plants maintained in the hyperopic environment for 7 days. Superoxide dismutase activity was not altered from its level in control tissue during the 7-day experimental period. These results suggest a key role for glutathione reductase in the protection of photosynthetic tissue against detrimental effects of intermediate reduction products of O 2.
ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(82)85011-5