Phycobilisome integrity and functionality in lipid unsaturation and xanthophyll mutants in Synechocystis

2020 ◽  
Vol 145 (2) ◽  
pp. 179-188
Author(s):  
Sindhujaa Vajravel ◽  
Hajnalka Laczkó-Dobos ◽  
Nia Petrova ◽  
Éva Herman ◽  
Terézia Kovács ◽  
...  
Keyword(s):  
Lipid Unsaturation

scholarly journals Heat stress elicits remodeling in the anther lipidome of peanut

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Zolian S. Zoong Lwe ◽  
Ruth Welti ◽  
Daniel Anco ◽  
Salman Naveed ◽  
Sachin Rustgi ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Heat Stress ◽  
Fatty Acid ◽  
Membrane Lipids ◽  
Fatty Acid Desaturase ◽  
Susceptible Genotype ◽  
Unsaturated Lipid ◽  
Lipid Species ◽  
Lipid Unsaturation ◽  
Fatty Acid Amount

AbstractUnderstanding the changes in peanut (Arachis hypogaea L.) anther lipidome under heat stress (HT) will aid in understanding the mechanisms of heat tolerance. We profiled the anther lipidome of seven genotypes exposed to ambient temperature (AT) or HT during flowering. Under AT and HT, the lipidome was dominated by phosphatidylcholine (PC), phosphatidylethanolamine (PE), and triacylglycerol (TAG) species (> 50% of total lipids). Of 89 lipid analytes specified by total acyl carbons:total carbon–carbon double bonds, 36:6, 36:5, and 34:3 PC and 34:3 PE (all contain 18:3 fatty acid and decreased under HT) were the most important lipids that differentiated HT from AT. Heat stress caused decreases in unsaturation indices of membrane lipids, primarily due to decreases in highly-unsaturated lipid species that contained 18:3 fatty acids. In parallel, the expression of Fatty Acid Desaturase 3-2 (FAD3-2; converts 18:2 fatty acids to 18:3) decreased under HT for the heat-tolerant genotype SPT 06-07 but not for the susceptible genotype Bailey. Our results suggested that decreasing lipid unsaturation levels by lowering 18:3 fatty-acid amount through reducing FAD3 expression is likely an acclimation mechanism to heat stress in peanut. Thus, genotypes that are more efficient in doing so will be relatively more tolerant to HT.

Biospectroscopic Imaging Provides Evidence of Hippocampal Zn Deficiency and Decreased Lipid Unsaturation in an Accelerated Aging Mouse Model

2018 ◽  
Vol 9 (11) ◽  
pp. 2774-2785 ◽  
Author(s):  
Nicholas Fimognari ◽  
Ashley Hollings ◽  
Virginie Lam ◽  
Rebecca J. Tidy ◽  
Cameron M. Kewish ◽  
...  
Keyword(s):  
Mouse Model ◽  
Accelerated Aging ◽  
Zn Deficiency ◽  
Aging Mouse ◽  
Lipid Unsaturation

Antioxidant status and dietary lipid unsaturation modulate oxidative DNA damage

1994 ◽  
Vol 16 (1) ◽  
pp. 111-115 ◽  
Author(s):  
Albert D. Haegele ◽  
Stephanie P. Briggs ◽  
Henry J. Thompson
Keyword(s):  
Dna Damage ◽  
Antioxidant Status ◽  
Oxidative Dna Damage ◽  
Dietary Lipid ◽  
Lipid Unsaturation

scholarly journals Author Correction: Plasma membranes are asymmetric in lipid unsaturation, packing and protein shape

2020 ◽  
Vol 16 (6) ◽  
pp. 710-710 ◽  
Author(s):  
J. H. Lorent ◽  
K. R. Levental ◽  
L. Ganesan ◽  
G. Rivera-Longsworth ◽  
E. Sezgin ◽  
...  
Keyword(s):  
Plasma Membranes ◽  
Lipid Unsaturation ◽  
Protein Shape

Lipid unsaturation and organelle dynamics

2016 ◽  
Vol 41 ◽  
pp. 25-32 ◽  
Author(s):  
Hélène Barelli ◽  
Bruno Antonny
Keyword(s):  
Lipid Unsaturation

scholarly journals Membrane-lipid unsaturation and mitochondrial function in Saacharomyces cerevisiae

1975 ◽  
Vol 146 (2) ◽  
pp. 409-416 ◽  
Author(s):  
K Watson ◽  
R L Houghton ◽  
E Bertoli ◽  
D E Griffiths
Keyword(s):  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Mitochondrial Membrane ◽  
Membrane Lipids ◽  
Membrane Lipid ◽  
Mitochondrial Atpase ◽  
Degree Of Unsaturation ◽  
Membrane Bound ◽  
Lipid Unsaturation ◽  
Membrane Bound Enzymes

The lipid composition of yeast cells was manipulated by the use of an unsaturated fatty acid auxotroph of Saccharomyces cerevisiae. There was a 2-3-fold decrease in the concentration of cytochromes a+a3 when the unsaturated fatty acid content of the cells was decreased from 60-70% of the total fatty acid to 20-30%. The amounts of cytochromes b and c were also decreased under these conditions, but to a lesser extent. Further lipid depletion, to proportions of less than 20% unsaturated fatty acid, led to a dramatic decrease in the content of all cytochromes, particularly cytochromes a+a3. The ATPase (adenosine triphosphatase), succinate oxidase and NADH oxidase activities of the isolated mitochondria also varied with the degree of unsaturation of the membrane lipids. The lower the percentage of unsaturated fatty acid, the lower was the enzymic activity. Inhibition of mitochondrial ATPase by oligomycin, on the other hand, was not markedly influenced by the membrane-lipid unsaturation. Npn-linear Arrenius plots of mitochondrial membrane-bound enzymes showed transition temperatures that were dependent on the degree of membrane-lipid unsaturation. The greater the degree of lipid unsaturation, the lower was the transition temperature. It was concluded that the degree of unsaturation of the membrane lipids plays an important role in determining the properties of mitochondrial membrane-bound enzymes.

Lipid autoxidation and seed ageing: putative relationships between seed longevity and lipid stability

1992 ◽  
Vol 2 (1) ◽  
pp. 51-54 ◽  
Author(s):  
R. T. Ponquett ◽  
M. T. Smith ◽  
G. Ross
Keyword(s):  
Lens Culinaris ◽  
Saturated Fatty Acids ◽  
Seed Longevity ◽  
Lipid Autoxidation ◽  
Lipid Stability ◽  
Seed Ageing ◽  
Lipid Unsaturation ◽  
Multiplicative Regression Model ◽  
The Relationship ◽  
Free Radical Lipid

AbstractOn the premise that seed ageing may be largely a result of free-radical lipid autoxidation, a study was made of the relationship between lipid stability and longevity in seeds of soybean (Glycine max), lentil (Lens culinaris), mungbean (Vigna radiata), chickpea (Cicer arietinum), broadbean (Vicia faba), pea (Pisum sativum), lettuce (Lactuca sativa), and tomato (Lycopersicon esculentum). Seed lipids were examined for α-, γ- and δ-tocopherols, and levels of unsaturated and saturated fatty acids. Using this information, analysis was attempted using linear, multiplicative or exponential models to correlate aspects of lipid stability with seed longevity values from the published literature. No statistically significant correlations could be found between longevity and total lipid unsaturation, tocopherol levels or two protection formulae obtained from the oil chemistry literature. When values for tomato were excluded, a good correlation (r = 0.89, P = 0.007) was obtained using a multiplicative regression model for levels of linolenic acid per unit of total tocopherols in relation to longevity. Possible factors contributing to a lessening of the relationship between lipid stability and seed longevity are discussed.

Effects of membrane lipid unsaturation on the interactions of insulin and multiplication stimulating activity with endothelial cells

1984 ◽  
Vol 804 (4) ◽  
pp. 466-473 ◽  
Author(s):  
Robert S. Bar ◽  
Sharon Dolash ◽  
Arthur A. Spector ◽  
Terry L. Kaduce ◽  
Paul H. Figard
Keyword(s):  
Endothelial Cells ◽  
Membrane Lipid ◽  
Lipid Unsaturation
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