SE150:/SS1
From Metabolonote
Sample Set Information
| ID | TSE1305 |
|---|---|
| Title | A new class of plant lipid is essential for protection against phosphorus depletion. |
| Description | Phosphorus supply is a major factor responsible for reduced crop yields. As a result, plants utilize various adaptive mechanisms against phosphorus depletion, including lipid remodelling. Here we report the involvement of a novel plant lipid, glucuronosyldiacylglycerol, against phosphorus depletion. Lipidomic analysis of Arabidopsis plants cultured in phosphorus-depleted conditions revealed inducible accumulation of glucuronosyldiacylglycerol. Investigation using a series of sulfolipid sulfoquinovosyldiacylglycerol synthesis-deficient mutants of Arabidopsis determined that the biosynthesis of glucuronosyldiacylglycerol shares the pathway of sulfoquinovosyldiacylglycerol synthesis in chloroplasts. Under phosphorus-depleted conditions, the Arabidopsis sqd2 mutant, which does not accumulate either sulfoquinovosyldiacylglycerol or glucuronosyldiacylglycerol, was the most severely damaged of three sulfoquinovosyldiacylglycerol-deficient mutants. As glucuronosyldiacylglycerol is still present in the other two mutants, this result indicates that glucuronosyldiacylglycerol has a role in the protection of plants against phosphorus limitation stress. Glucuronosyldiacylglycerol was also found in rice, and its concentration increased significantly following phosphorus limitation, suggesting a shared physiological significance of this novel lipid against phosphorus depletion in plants. |
| Authors | Okazaki Y, Otsuki H, Narisawa T, Kobayashi M, Sawai S, Kamide Y, Kusano M, Aoki T, Hirai MY, Saito K. |
| Reference | Nat Commun. 2013;4:1510. doi: 10.1038/ncomms2512. |
| Comment |
Sample Preparation Details Information
| ID | SS1 |
|---|---|
| Title | Sample Preparation |
| Description | Surface-sterilized seeds were sown on agar-solidified Murashige and Skoog medium containing 1% (w/v) sucrose at 22 °C under 16 h light/8 h dark cycles. Photon flux density was 50 μmol m–2 sec–1. The seedlings were kept on agar for 14 days before transfer to plates with controlled phosphate (Pi) concentrations. For P-limitation experiments, sterile Arabidopsis medium was used but at half concentration and containing 0.8% (w/v) agar, 20 mM MES (pH 6.0) and different concentrations of KH2PO4 as indicated. For lipid analysis, leaves were harvested 6 h after the onset of the light phase, frozen in liquid nitrogen and stored at −80 °C until lipid extraction. |
| Comment_of_details |
