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Open Access Green as soon as Postprint is submitted to ZB.
Sulfate and sulfite translocation via the phosphate translocator of the inner envelope membrane of chloroplasts.
Planta 137, 309-312 (1977)
The permeability of the inner envelope membranes of spinach (Spinacia oleracea) chloroplasts to sulfite and sulfate was investigated in vitro, using the technique of silicone oil centrifugal filtration. The results show that there is a permeability towards both ions, resulting in rates of uptake of about 1.0 (SO3 2-) and 0.7 (SO4 2-) μmol mg chlorophyll-1 h-1 respectively (external concentration 2 mmol l-1). The rates depend on the external concentration of the anions. Anion exchange experiments with 35S-preloaded chloroplasts indicate that sulfite and sulfate are exchanged for inorganic phosphate, phosphoglyceric acid, and dihydroxyacetone phosphate with rates up to 14 nmol mg chlorophyll-1 min-1. There is no exchange for glucose-6-phosphate and malate. Because of the similarities to the transport of inorganic phosphate and triose phosphates the results give evidence that the phosphate translocator of the inner envelope membrane of chloroplasts is also involved in sulfite and sulfate transport - at least in part.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Chloroplast Envelope ; Ion Transport ; Sulfate ; Sulfite
ISSN (print) / ISBN
0032-0935
e-ISSN
1432-2048
Journal
Planta
Quellenangaben
Volume: 137,
Issue: 3,
Pages: 309-312
Publisher
Springer
Reviewing status
Peer reviewed
Institute(s)
Institut für Biochemie