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- Title
Ancient rice cultivar extensively replaces phospholipids with non‐phosphorus glycolipid under phosphorus deficiency.
- Authors
Keitaro Tawaraya; Soichiro Honda; Weiguo Cheng; Masaru Chuba; Yozo Okazaki; Kazuki Saito; Akira Oikawa; Hayato Maruyama; Jun Wasaki; Tadao Wagatsuma
- Abstract
Recycling of phosphorus (P) from P‐containing metabolites is an adaptive strategy of plants to overcome soil P deficiency. This study was aimed at demonstrating differences in lipid remodelling between low‐P‐tolerant and ‐sensitive rice cultivars using lipidome profiling. The rice cultivars Akamai (low‐P‐tolerant) and Koshihikari (low‐P‐sensitive) were grown in a culture solution with [2 mg l−1 (+P)] or without (−P) phosphate for 21 and 28 days after transplantation. Upper and lower leaves were collected. Lipids were extracted from the leaves and their composition was analysed by liquid chromatography/mass spectrometry (LC–MS). Phospholipids, namely phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylglycerol (PG) and phosphatidylinositol (PI), lysophosphatidylcholine (lysoPC), diacylglycerol (DAG), triacylglycerol (TAG) and glycolipids, namely sulfoquinovosyl diacylglycerol (SQDG), digalactosyldiacylglycerol (DGDG), monogalactosyldiacylglycerol (MGDG) and 1,2‐diacyl‐3‐O‐alpha‐glucuronosyl glycerol (GlcADG), were detected. GlcADG level was higher in both cultivars grown in −P than in +P and the increase was larger in Akamai than in Koshihikari. DGDG, MGDG and SQDG levels were higher in Akamai grown in −P than in +P and the increase was larger in the upper leaves than in the lower leaves. PC, PE, PG and PI levels were lower in both cultivars grown in −P than in +P and the decrease was larger in the lower leaves than in the upper leaves and in Akamai than in Koshihikari. Akamai catabolised more phospholipids in older leaves and synthesised glycolipids in younger leaves. These results suggested that extensive phospholipid replacement with non‐phosphorus glycolipids is a mechanism underlying low‐P‐tolerance in rice cultivars.
- Subjects
RICE farming; CULTIVARS; PHOSPHOLIPIDS; PHOSPHORUS in soils; GLYCOLIPIDS
- Publication
Physiologia Plantarum, 2018, Vol 163, Issue 3, p297
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/ppl.12699