Photoreduction of Sulfur Dioxide by Spinach Leaves and Isolated Spinach Chloroplasts
- 1 May 1976
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 57 (5) , 799-801
- https://doi.org/10.1104/pp.57.5.799
Abstract
Labeled SO2 was extensively absorbed by spinach (Spinacea oleracea L.) leaves. Labeled sulfides detected in leaf blades following fumigations with SO2 in light indicated that photoreduction of SO2 had occurred. Measurable proportions of this labeled S was localized within the chloroplast fraction. Suspensions of isolated chloroplasts supplied with labeled SO2 contained labeled sulfides following a 30-min illumination period in water-cooled reaction vessels. With reference to recent studies of the chloroplast S reduction pathway, probable points of entry for SO2 and the subsequent release of H2S are discussed.Keywords
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