ArticlePlant physiology2014
Origin of β-carotene-rich plastoglobuli in Dunaliella bardawil.
Article in Plant physiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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Who cites it
27 citing papers in PubMed, 69 citations in OpenAlex.
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- Pumping iron: A multi-omics analysis of two extremophilic algae reveals iron economy management.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Identification of major carotenoids from green alga Tetraspora sp. CU2551: partial purification and characterization of lutein, canthaxanthin, neochrome, and β-carotene.World journal of microbiology & biotechnology · 2022Article
- Fatty Acid Production and Direct Acyl Transfer through Polar Lipids Control TAG Biosynthesis during Nitrogen Deprivation in the Halotolerant AlgaMarine drugs · 2021Article
- Deciphering the Biological Activities ofInternational journal of molecular sciences · 2020Article
- The cadmium-induced changes in the polar and neutral lipid compositions suggest the involvement of triacylglycerol in the defense response in maize.Physiology and molecular biology of plants : an international journal of functional plant biology · 2020Article
- Red Light Control of β-Carotene Isomerisation toAntioxidants (Basel, Switzerland) · 2019Article
- Carotenoid Production byAntioxidants (Basel, Switzerland) · 2019Article
- A hypothesis about the origin of carotenoid lipid droplets in the green algae Dunaliella and Haematococcus.Planta · 2019Review
- Stress-induced changes in the ultrastructure of the photosynthetic apparatus of green microalgae.Protoplasma · 2019Article
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- Triacylglycerol is produced from starch and polar lipids in the green alga Dunaliella tertiolecta.Journal of experimental botany · 2017Article
- Carotenogenic response in photosynthetic organisms: a colorful story.Photosynthesis research · 2017Review
- Bioenergy application of Dunaliella salina SA 134 grown at various salinity levels for lipid production.Scientific reports · 2017Article
- Novel 9-cis/all-trans β-carotene isomerases from plastidic oil bodies in Dunaliella bardawil catalyze the conversion of all-trans to 9-cis β-carotene.Plant cell reports · 2017Article
- Glycerolipid Characterization and Nutrient Deprivation-Associated Changes in the Green PicoalgaPlant physiology · 2017Article
- Article
- Occurrence of plastidial triacylglycerol synthesis and the potential regulatory role of AGPAT in the model diatomBiotechnology for biofuels · 2017Article
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The halotolerant microalgae Dunaliella bardawil accumulates under nitrogen deprivation two types of lipid droplets: plastoglobuli rich in β-carotene (βC-plastoglobuli) and cytoplasmatic lipid droplets (CLDs). We describe the isolation, composition, and origin of these lipid droplets. Plastoglobuli contain β-carotene, phytoene, and galactolipids missing in CLDs. The two preparations contain different lipid-associated proteins: major lipid droplet protein in CLD and the Prorich carotene globule protein in βC-plastoglobuli. The compositions of triglyceride (TAG) molecular species, total fatty acids, and sn-1+3 and sn-2 positions in the two lipid pools are similar, except for a small increase in palmitic acid in plastoglobuli, suggesting a common origin. The formation of CLD TAG precedes that of βC-plastoglobuli, reaching a maximum after 48 h of nitrogen deprivation and then decreasing. Palmitic acid incorporation kinetics indicated that, at early stages of nitrogen deprivation, CLD TAG is synthesized mostly from newly formed fatty acids, whereas in βC-plastoglobuli, a large part of TAG is produced from fatty acids of preformed membrane lipids. Electron microscopic analyses revealed that CLDs adhere to chloroplast envelope membranes concomitant with appearance of small βC-plastoglobuli within the chloroplast. Based on these results, we propose that CLDs in D. bardawil are produced in the endoplasmatic reticulum, whereas βC-plastoglobuli are made, in part, from hydrolysis of chloroplast membrane lipids and in part, by a continual transfer of TAG or fatty acids derived from CLD.
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