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. 1976 May;57(5):799-801.
doi: 10.1104/pp.57.5.799.

Photoreduction of sulfur dioxide by spinach leaves and isolated spinach chloroplasts

J E Silvius  1 , C H Baer, S Dodrill, H Patrick
Affiliations

Photoreduction of sulfur dioxide by spinach leaves and isolated spinach chloroplasts

J E Silvius et al. Plant Physiol. 1976 May.

Abstract

Labeled sulfur dioxide was found to be extensively absorbed by spinach (Spinacea oleracea L.) leaves. Labeled sulfides detected in leaf blades following fumigations with sulfur dioxide in light indicated that photoreduction of sulfur dioxide had occurred. Measurable proportions of this labeled sulfur was localized within the chloroplast fraction. Suspensions of isolated chloroplasts supplied with labeled sulfur dioxide contained labeled sulfides following a 30-minute illumination period in water-cooled reaction vessels. With reference to recent studies of the chloroplast sulfur reduction pathway, probable points of entry for sulfur dioxide and the subsequent release of hydrogen sulfide are discussed.

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