Effect of age on the fatty acid content of Blumeria graminis conidia

2000 ◽  
Vol 28 (6) ◽  
pp. 875-877 ◽  
Author(s):  
J. Muchembled ◽  
A. Lounes-Hadj Sahraoui ◽  
A. Grandmougin-Ferjani ◽  
M. Sancholle
Keyword(s):  
Fatty Acid ◽  
Powdery Mildew ◽  
Plant Pathogen ◽  
Fatty Acid Content ◽  
Dry Weight ◽  
Fa Composition ◽  
First Time ◽  
Effect Of Age ◽  
Important Disease ◽  
Long Chain

Blumeria (=Erysiphe) graminis f.sp. tritici (Bgt), the causal agent of wheat powdery mildew, is responsible for an important disease leading to considerable yield reductions in wheat worldwide. Conidia of the obligate plant pathogen Bgt were analysed for their total fatty acid (FA) composition as a function of their ontogeny. A total of 17 FAs were detected (C12–C24 saturated and unsaturated ones), including the presence of unusual longchain monoenoic FAs. In young conidia, the major FAs were C18:2 (23%), C16:0 (16%), C18:0 (15.2%) and C18:1 (14.3%). In old conidia, the main FAs were C24:1 (20.7%), C22:0 (15%), C22:1 (13.5%) and C24:0 (9.7%). The amount of total FA was about 39 μg.mg of dry weight-1 in young conidia and decreased clearly to 18 μg.mg of dry weight-1 in older conidia. For the first time, we have demonstrated that the FA composition of conidia changes greatly with age. Medium-chain FAs (C12–C18) are predominant in very young conidia (75%), whereas long-chain FAs (C22–C24) are the major compounds in old conidia (74%). This study showed a significant elongation of FAs and a drastic decrease in the total FA amount during the ontogeny of conidia.

scholarly journals Post-mortem storage conditions and cooking methods affect long-chain omega-3 fatty acid content in Atlantic mackerel (Scomber scombrus)

2021 ◽  
Vol 359 ◽  
pp. 129828
Author(s):  
Fany Sardenne ◽  
Eleonora Puccinelli ◽  
Marie Vagner ◽  
Laure Pecquerie ◽  
Antoine Bideau ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Content ◽  
Storage Conditions ◽  
Cooking Methods ◽  
Post Mortem ◽  
Omega 3 ◽  
Omega 3 Fatty Acid ◽  
Atlantic Mackerel ◽  
Scomber Scombrus ◽  
Long Chain

The Spawning of Echinus Esculentus and Some Changes in Gonad Composition

1931 ◽  
Vol 8 (2) ◽  
pp. 133-150
Author(s):  
F. C. STOTT
Keyword(s):  
Fatty Acid ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Dry Weight ◽  
Sea Temperature ◽  
Male And Female ◽  
Simultaneous Decrease ◽  
Post Spawning ◽  
Food Reserves ◽  
Inshore Migration

1. The spring inshore migration of Echinus at Port Erin in 1930 started in early February and reached its maximum in the middle of March. Mature gonads were found at the end of February and throughout March and early April. At the end of June all gonads examined were spent. The sea temperature throughout this period was observed. It is probable that May was the chief month in which natural spawning took place. 2. A cycle of changes in the composition of the gonad are recorded from November 1929 to July 1930. The chief of these are: (a) In the males an increase in percentage dry weight as the gonads mature ; the opposite taking place in the females. (b) A large and simultaneous decrease in percentage glycogen in both male and female gonads prior to spawning followed by a great post-spawning increase. The fatty acid content does not alter with the maturation of the gonad, but an indication is given that an increase in the percentage of carbohydrates other than glycogen occurs. Hence it is suggested that glycogen is transformed in the maturing gonad into carbohydrate food reserves for the ripe eggs and sperm.

scholarly journals Soybean Lecithin High in Free Fatty Acids for Broiler Chicken Diets: Impact on Performance, Fatty Acid Digestibility and Saturation Degree of Adipose Tissue

Animals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 802
Author(s):  
Viñado ◽  
Castillejos ◽  
Barroeta
Keyword(s):  
Fatty Acid ◽  
Broiler Chicken ◽  
Soybean Lecithin ◽  
Fatty Acid Content ◽  
Basal Diet ◽  
Abdominal Fat ◽  
Performance Parameters ◽  
Fat Pad ◽  
Fa Composition ◽  
Finisher Diets

Two experiments were conducted to evaluate the inclusion of soybean lecithin with a high free fatty acid content (L) in starter and grower–finisher broiler diets, as well as its influence on performance, energy and fatty acid (FA) utilization and the FA profile of the abdominal fat pad (AFP). A basal diet was supplemented with soybean oil (S; Experiment 1) or acid oil (AO; Experiment 2) at 3%, and increasing amounts of L (1%, 2% and 3%) were included in replacement. The inclusion of L did not modify performance parameters (p > 0.05). The S replacement by L reduced energy and total FA utilization (p ≤ 0.05) in starter diets; however, in grower–finisher diets, a replacement up to 2% did not modify energy and FA utilization (p > 0.05). The AO substitution by L produced no modifications on energy and FA utilization (p > 0.05) during the starter phase, while the blend of 1% of AO and 2% of L resulted in the best combination in terms of the FA digestibility. The FA profile of the AFP reflected the FA composition of diets. The addition of L could replace, up to 2% or be blended with AO in broiler grower–finisher diets as an energy source.

scholarly journals Natural Variation in Seed Very Long Chain Fatty Acid Content Is Controlled by a New Isoform of KCS18 in Arabidopsis thaliana

PLoS ONE ◽  
2012 ◽  
Vol 7 (11) ◽  
pp. e49261 ◽  
Author(s):  
Sophie Jasinski ◽  
Alain Lécureuil ◽  
Martine Miquel ◽  
Olivier Loudet ◽  
Sylvain Raffaele ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Fatty Acid ◽  
Acid Content ◽  
Natural Variation ◽  
Fatty Acid Content ◽  
Chain Fatty Acid ◽  
Long Chain Fatty Acid ◽  
Long Chain

scholarly journals A New Long-Chain Unsaturated Ester and Other Constituents of Hypericum tomentosum

2012 ◽  
Vol 7 (1) ◽  
pp. 1934578X1200700
Author(s):  
Ouassila Touafek ◽  
Zahia Kabouche ◽  
Joël Boustie ◽  
Christian Bruneau
Keyword(s):  
Fatty Acid ◽  
Endemic Species ◽  
Spectroscopic Analysis ◽  
Fatty Ester ◽  
Light Petroleum ◽  
Unsaturated Ester ◽  
Unsaturated Esters ◽  
First Time ◽  
Long Chain

Three long-chain unsaturated esters (1-3), a fatty acid (4), a fatty ester (5), phytone (6) and a phloroglucinol (hyperfoliatin) (7) were isolated from the light petroleum extract of the endemic species Hypericum tomentosum L. (Clusiaceae). Compound 2, 8,10,13-trimethyltetradecanoic acid (2E)-3-methylhexadec-2-enyl ester, which we named tomentosate, is reported for the first time. The structures of the identified compounds were established on the basis of physical and spectroscopic analysis, and by comparison with literature data.

Effects of desiccation on temperate recalcitrant seeds: differential scanning calorimetry, gas chromatography, electron microscopy, and moisture studies on Quercusnigra and Quercusalba

1996 ◽  
Vol 26 (10) ◽  
pp. 1813-1821 ◽  
Author(s):  
K.F. Connor ◽  
F.T. Bonner ◽  
J.A. Vozzo
Keyword(s):  
Electron Microscopy ◽  
Differential Scanning Calorimetry ◽  
Cell Wall ◽  
Fatty Acid ◽  
Moisture Content ◽  
Fatty Acid Content ◽  
Heat Content ◽  
Dry Weight ◽  
Scanning Calorimetry ◽  
Seed Moisture

Investigations into the nature of desiccation-sensitive, or recalcitant, seed behavior have as yet failed to identify exact causes of this phenomenon. Experiments with Quercusnigra L. and Quercusalba L. were conducted to examine physiological and biochemical changes brought about by seed desiccation and to determine if there were predictable changes in seed moisture content, in enthalpy (heat content) of seed moisture, in the lipid fraction, or in seed ultrastructure as viability declined. Quercusnigra intact acorn moisture contents at 50% and 5% viability were 15% and less than 14%, respectively; those of intact Q. alba at 50% and 0% viability were much higher, 32% and 22%, respectively. Generally, it was found that as the seeds of both species dried, the moisture content of the axes remained high (26–27%), even after 9 days of drying. In Q. nigra acorns, there was little difference in average percent moisture lost per day among axes, proximal cotyledon tissue, and distal cotyledon tissue. Quercusalba acorns, however, lost moisture more rapidly from the axes than from the cotyledons. This was probably caused by the longitudinal splitting of the pericarp during the drying process. Lipids composed 28.4% of the dry weight of Q. nigra and 5.7% of Q. alba dry weight. Neither individual fatty acids nor total fatty acid content exhibited definite patterns of change over the course of the experiment. The most prevalent saturated fatty acid in both species was palmitic acid, and the most common unsaturated fatty acid was generally oleic acid. Electron microscopy studies of Q. nigra showed cell wall trauma after 3 days of drying (moisture content 23%); by day 7, when moisture content had dropped to 15.6%, there was a definite dissolution of cytoplasmic density and a reduction of spherosome concentration. Quercusalba exhibited similar responses to drying, but cell wall integrity was maintained. Differential scanning calorimetry studies revealed strong relationships between onset and enthalpy values of all acorn tissues and percent germination, as did regressions involving moisture content and seed germination.

Analysis of long-chain ω-3 fatty acid content in fish-oil supplements

2007 ◽  
Vol 119 (13-14) ◽  
pp. 417-422 ◽  
Author(s):  
Tobias Tatarczyk ◽  
Julia Engl ◽  
Christian Ciardi ◽  
Markus Laimer ◽  
Susanne Kaser ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Fish Oil ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Long Chain
Sign in / Sign up

Export Citation Format

Share Document