Biosynthesis of plant sulfolipids
Description
The complete biosynthesis of sulfoquinovosyldiacylglycerol (SQDG) remains undetermined although dark synthesis of SQDG by chloroplasts supplied with AP35S, PAP35S or 35SO4 plus ATP suggests the sulfur moiety arises from either APS or sulfite (1). Sulfate incorporation into sulfolipids in isolated chloroplasts and in intact roots is reported here and compared to lipids labelled by 14C-acetate or 14C-glycerol. Several unknown 35S-labelled chloroform-soluble compounds were isolated from sterile roots. These 35S-labelled compounds differ from those of the chloroplast, identified as elemental sulfur forms. Identification of the unknown root compounds is in progress. Unlike chloroplast, isolated root plastids do not synthesis SQDG from sulfate plus ATP suggesting a requirement for an activated form of sulfate, such as APS or PAPS
Additional details
Publishing Information
- Journal Title
- Plant Physiology, Supplement
- Journal Volume
- 89
- Journal Issue
- 4
- Series
- Plant Physiol., Suppl.
- Journal Page Range
- 154
- CODEN
- PPYSA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21053223
- Subject category
- S60: APPLIED LIFE SCIENCES;
- Descriptors DEI
- ACETATES; BIOSYNTHESIS; CARBON 14 COMPOUNDS; LABELLED COMPOUNDS; LIPIDS; PLANTS; ROOTS; SULFUR COMPOUNDS; SULFUR 35; TRACER TECHNIQUES
- Descriptors DEC
- BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON COMPOUNDS; CARBOXYLIC ACID SALTS; DAYS LIVING RADIOISOTOPES; EVEN-ODD NUCLEI; ISOTOPE APPLICATIONS; ISOTOPES; LIGHT NUCLEI; NUCLEI; ORGANIC COMPOUNDS; RADIOISOTOPES; SULFUR ISOTOPES; SYNTHESIS