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- Title
Specialization of Oleosins in Oil Body Dynamics during Seed Development in Arabidopsis Seeds.
- Authors
Miquel, Martine; Trigui, Ghassen; d'Andréa, Sabine; Kelemen, Zsolt; Baud, Sébastien; Berger, Adeline; Deruyffelaere, Carine; Trubuil, Alain; Lepiniec, Loïc; Dubreucq, Bertrand
- Abstract
Oil bodies (OBs) are seed-specific lipid storage organelles that allow the accumulation of neutral lipids that sustain plantlet development after the onset of germination. OBs are covered with specific proteins embedded in a single layer of phospholipids. Using fluorescent dyes and confocal microscopy, we monitored the dynamics of OBs in living Arabidopsis (Arabidopsis thaliana) embryos at different stages of development. Analyses were carried out with different genotypes: the wild type and three mutants affected in the accumulation of various oleosins (OLE1, OLE2, and OLE4), three major OB proteins. Image acquisition was followed by a detailed statistical analysis of OB size and distribution during seed development in the four dimensions (x, y, z, and t). Our results indicate that OB size increases sharply during seed maturation, in part by OB fusion, and then decreases until the end of the maturation process. In single, double, and triple mutant backgrounds, the size and spatial distribution of OBs are modified, affecting in turn the total lipid content, which suggests that the oleosins studied have specific functions in the dynamics of lipid accumulation.
- Subjects
OLEOSINS; SEED development; ARABIDOPSIS thaliana; PHOSPHOLIPIDS; FLUORESCENT dyes; CONFOCAL microscopy
- Publication
Plant Physiology, 2014, Vol 164, Issue 4, p1866
- ISSN
0032-0889
- Publication type
Article
- DOI
10.1104/pp.113.233262