Influence of oil content on the equilibrium moisture content of evening primrose ( Oenothera SPP.) seeds

2007 ◽  
Vol 55 (4) ◽  
pp. 485-489 ◽  
Author(s):  
A. Fieldsend
Keyword(s):  
Moisture Content ◽  
Equilibrium Moisture Content ◽  
Oil Content ◽  
Seed Oil ◽  
Oil Quality ◽  
Seed Oil Content ◽  
Seed Moisture Content ◽  
Evening Primrose ◽  
Seed Moisture ◽  
The Relationship

Seed moisture content is a well-recognised index of safe storage. However, when in equilibrium with the storage environment it is merely an indicator of the relative humidity of the air, which is the primary regulator of the growth of moulds and insects. The relationship is influenced by the profile of the seed components. During the 1990s, significant increases in the seed oil content of evening primrose were achieved through plant breeding. This paper shows that the equilibrium moisture content of evening primrose seeds declines significantly with increasing oil content. Hence, the moisture isotherm is altered and newer cultivars must be stored at slightly lower seed moisture contents to ensure that seed and oil quality are maintained.

Identification of Brassica genotypes and molecular markers for increased seed oil content

2014 ◽  
Vol 94 (6) ◽  
pp. 1103-1108 ◽  
Author(s):  
Nasir Javed ◽  
Muhammad Tahir ◽  
Jianfeng Geng ◽  
Genyi Li ◽  
Peter B. E. McVetty
Keyword(s):  
Fatty Acids ◽  
Molecular Markers ◽  
Genetic Map ◽  
Carbon Dioxide Emissions ◽  
Oil Content ◽  
Seed Oil ◽  
Oil Quality ◽  
Biodiesel Production ◽  
Seed Oil Content ◽  
Transportation Sector

Javed, N., Tahir, M., Geng, J., Li, G. and McVetty, P. B. E. 2014. Identification of Brassica genotypes and molecular markers for increased seed oil content. Can. J. Plant Sci. 94: 1103–1108. Carbon dioxide emissions by the transportation sector are major contributors to global climate change. Lower CO2 emissions by the transportation sector are linked to the use of renewable fuels including biodiesel. Canola has high seed oil content, adaptation to temperate climates and favorable fatty acid composition, which make it a preferred feedstock for biodiesel production. Doubled haploid (DH) line, random inbred (RI) line and consensus genetics maps for mapping populations derived from Polo × Topas were developed. The DH line-based genetic map was then used for the identification and tagging of quantitative trait loci (QTL) controlling seed oil biosynthesis. This genetic map consisted of 620 loci identified using several different types of molecular markers, and covered a map distance of 2241.1 cM with marker saturation of 3.7 cM. The phenotypic data on the mapping population for seed oil content and component fatty acids were collected from four-environment replicated field trials. One hundred and thirty-one QTL for various fatty acids in canola oil and 14 QTL for oil content were identified. These QTL, combined with marker-assisted selection, may assist breeders in their attempts to develop canola lines with improved oil quality, oil content and oil production per hectare for biodiesel production.

Temperature and Water Status of Seed Affect Afterripening in Wild Oat (Avena fatua)

Weed Science ◽  
1994 ◽  
Vol 42 (2) ◽  
pp. 200-204 ◽  
Author(s):  
Michael E. Foley
Keyword(s):  
Moisture Content ◽  
Water Status ◽  
Wild Oat ◽  
Dormant Seed ◽  
Seed Moisture Content ◽  
Water Binding ◽  
Seed Moisture ◽  
The Status ◽  
Dry Conditions ◽  
The Relationship

Dormant wild oat seed require afterripening under warm-dry conditions for conversion to a nondormant state capable of germination. Research was conducted to determine the relationship between temperature and seed moisture levels on afterripening of dormant wild oat line M73 seed, and to evaluate the status of water binding in the dormant seed. Conversion of dormant wild oat seed to a nondormant state at 20 to 40 C occurs primarily in the range of 5 to 20% seed moisture. There is an inverse relationship between temperature and seed moisture content for afterripening as measured by seed germination. As the afterripening temperature increases, the seed moisture content must decrease for maximum afterripening (germination) to occur. Moisture isotherms and derived enthalpy curves indicate three regions of water binding which reflect decreased binding of water to seed components as the moisture content in the dormant seed increases. Maximum afterripening, in the second region of water binding, corresponds to seed moisture contents of 7 to 22%. In this region water is weakly associated with macromolecular surfaces and begins to have solvent properties. Because afterripening occurs mainly in the second region of water binding it is likely that individual enzymatic and nonenzymatic reactions, rather than metabolic processes, mediate the conversion of wild oat seed to the nondormant state.

scholarly journals Desorption isotherms and isosteric heat of niger grains (Guizotia abyssinica (L. f.) Cass.)

2018 ◽  
Vol 12 (2) ◽  
pp. 124 ◽  
Author(s):  
Valdiney Cambuy Siqueira ◽  
Fernanda Pimentel Da Silva ◽  
Wellytton Darci Quequeto ◽  
Rodrigo Aparecido Jordan ◽  
Rafael Araujo Leite ◽  
...  
Keyword(s):  
Experimental Data ◽  
Moisture Content ◽  
Mathematical Models ◽  
Water Activity ◽  
Seed Oil ◽  
Oil Quality ◽  
Gravimetric Method ◽  
Isosteric Heat ◽  
Seed Moisture Content ◽  
Desorption Isotherms

Niger seed oil has excellent quality and quantity (30-50%) and is rich in polyunsaturated fatty acids, mainly linoleic acid (about 70%). Thus, control of environmental temperature and relative humidity, and of seed moisture content is essential to maintain seed oil quality during storage. Thus, the objective of this study was to determine the desorption isotherms of niger seeds under different temperature and water activity conditions, to test the experimental data with different mathematical models, and discover which best represents the phenomenon, as well as calculate the isosteric heat value for the product. Hygroscopicity was determined by the static gravimetric method, at temperatures of 30, 35 and 40 ºC, and water activity between 0.07 and 0.79 (decimal). For the experimental data, mathematical models commonly used to test hygroscopicity in agricultural products were evaluated. From the results obtained, it was concluded that: water activity increases as moisture content rises; based on the statistical parameters, the models of Chung and Pfost, modified Henderson, Oswin, Sabbah, Sigma Copace, Halsey, Smith and Copace appropriatrely represented the desorption phenomenon of niger seeds; total isosteric desorption heat increased with reduction of moisture content, with values varying from 2539.62 to 3081.48 kJ kg-1, within the range of equilibrium moisture content of 2.4 to 12.2 (% dry basis).

EFFECTS OF SEEDING AND HARVESTING DATES ON YIELD AND OIL QUALITY OF SUNFLOWER CULTIVARS

1985 ◽  
Vol 65 (2) ◽  
pp. 299-305 ◽  
Author(s):  
W. DEDIO
Keyword(s):  
Linoleic Acid ◽  
Oil Content ◽  
Oil Quality ◽  
Seed Moisture Content ◽  
Seeding Date ◽  
Seed Moisture ◽  
Harvest Dates ◽  
Linoleic Acid Level ◽  
Better Than

Several sunflower cultivars were seeded at approximately weekly intervals from early May to 20 June from 1978 to 1981. In another experiment the plots were harvested at different dates to study the effects on yield and oil quality. In general the yield was highest for all cultivars at the earliest seeding, with the late maturing cultivars performing the best. In late plantings, the yields were in general lower and early maturing cultivars performed better than the later ones. The cross-over point varied from year to year ranging from 16 May to 7 June except in 1981 when there was no cross-over. The oil content was similarly affected, declining more rapidly with delay in seeding in the later maturing hybrids than in the early hybrids. In the separate study on harvest dates, maximum oil content was reached when seed moisture content had declined to 45%. This occurred approximately 1 wk earlier in the early cultivars than in the late ones. Maximum linoleic acid level was reached approximately a week after the maximum oil content was obtained.Key words: Seeding date, sunflower, oil content, yield, linoleic acid, harvesting date

The Relationship Among Storage Condition and Seed Moisture Content Revisited

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 490c-490
Author(s):  
Jian Fang ◽  
Frank Moore ◽  
Eric E. Roos ◽  
Christina Walters
Keyword(s):  
Moisture Content ◽  
Storage Temperature ◽  
Selection Criterion ◽  
Seed Storage ◽  
Storage Condition ◽  
Third Order ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Orthodox Seeds ◽  
The Relationship

Seed moisture content (MC) changes depending upon relative humidity (RH) and temperature (T). This relationship was revealed by studying the interaction of RH and T at equilibrium. Maize, cucumber, onion, lettuce, watermelon, and pea seeds were equilibrated over various saturated salt solutions (1% to 93% RH) at temperatures from 5 to 50 °C. Five-hundred-eleven subset models were selected from a complete third-order model MC = 0 + 1*RH + 2*T + 3*RH2 + 4*T2 + 5*RH*T + 6*RH3 + 7*T3 + 8*RH*T2 + 9*RH2*T using Mallows' minimum Cp as the selection criterion. All six best subset models were found to have the same functional form, MC0 + 1 = *RH + 2*T + *RH2 + 5*RH*T + 6*RH + 9*RH2*T. Coefficients had essentially the same respective values among species, except for the onion and pea models (P ≤ 0.05). All models indicated that seed MC increased as RH increased and decreased as temperature increased. A previous paper (Vertucci and Roos, 1990) indicated that optimum RH for orthodox seed storage is between 19% and 27%. Using these models, the range for the optimum moisture content for storage of most orthodox seeds can be quickly calculated for any given storage temperature.

EFFECT OF TIME OF DESICCATION ON OIL CONTENT IN DIFFERENT SUNFLOWER HYBRIDS / EFECTO DEL TIEMPO DE DESECACION SOBRE EL CONTENIDO DE ACEITE EN DIVERSOS HIBRIDOS DEL GIRASOL / EFFET DU TEMPS DE DESSICCATION SUR LE CONTENU EN HUILE DANS DIFFÉRENTS HYBRIDES DE TOURNESOL

Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 95-104 ◽  
Author(s):  
Vladimir Miklič ◽  
Nenad Dušanić ◽  
Jovan Crnobarac ◽  
Jovan Joksimović
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Oil Content ◽  
Seed Oil ◽  
Content Increase ◽  
Seed Oil Content ◽  
Seed Moisture ◽  
H 26 ◽  
Large Increment ◽  
Nuclear Magnetic

SUMMARY Chemical desiccation with Reglone Forte has been tried in production fields under four sunflower hybrids. Reglone Forte (2 l/ha) was applied at 7-day intervals from the end of pollination till maturity. Seed moisture was determined prior to each treatment. Seed oil content was determined at maturity, using the method of nuclear magnetic resonance. The highest oil content was found in the control, the lowest in the treatment 7 days after flower (DAF). The absence of significant differences among treatments 21 DAF, 28 DAF and the control was an indication that there was no large increment in oil content in the period after the average seed moisture reached 44.34% and maturity. Considering individual hybrids, there was no large oil content increase already from treatment 14 DAF, with the exception of hybrid NS-H-43 which evidently required a later treatment. Considering the time of treatment in relation to seed moisture, this hybrid achieved maximum oil content when treated at 31% seed moisture. In hybrid NS-H-26 RM, however, maximum oil content was achieved with treatment at 25% seed moisture.

scholarly journals The Brassica Napus Fatty Acid Exporter FAX1-1 Contributes to Biological Yield, Seed Oil Production, and Oil Quality

2021 ◽  
Author(s):  
Zhongchun Xiao ◽  
Fang Tang ◽  
Liyuan Zhang ◽  
Shengting Li ◽  
Shufeng Wang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Brassica Napus ◽  
Seed Yield ◽  
Oil Content ◽  
Seed Oil ◽  
Oil Quality ◽  
Oil Production ◽  
Oilseed Crop ◽  
Seed Oil Content ◽  
Biological Yield

Abstract Background: In the oilseed crop Brassica napus (rapeseed), various metabolic processes influence seed oil production, oil quality, and biological yield. However, the role of plastid membrane proteins in these traits has not been explored. Results: Our genome-wide association study (GWAS) of 520 B. napus accessions identified the chloroplast membrane protein-localized FATTY ACID EXPORTER 1-1 (FAX1-1) as a candidate associated with biological yield. Seed transcript levels of BnaFAX1-1 were higher in a cultivar with high seed oil content relative to a low-oil cultivar. BnaFAX1-1 localized to the plastid envelope. When expressed in Arabidopsis thaliana, BnaFAX1-1 enhanced biological yield (total plant dry matter), seed yield and seed oil content per plant. Likewise, in the field, B. napus BnaFAX1-1 overexpression lines (BnaFAX1-1-OE) displayed significantly enhanced biological yield, seed yield, and seed oil content compared with the wild type. BnaFAX1-1 overexpression also up-regulated gibberellic acid 4 (GA4) biosynthesis, which may contribute to biological yield improvement. Furthermore, oleic acid (C18:1) significantly increased in BnaFAX1-1 overexpression seeds. Conclusion: Our results indicated that the putative fatty acid exporter BnaFAX1-1 simultaneously improved seed oil production, oil quality and biological yield in B. napus, providing new approaches for future molecular breeding.

scholarly journals The Brassica napus fatty acid exporter FAX1-1 contributes to biological yield, seed oil content, and oil quality

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Zhongchun Xiao ◽  
Fang Tang ◽  
Liyuan Zhang ◽  
Shengting Li ◽  
Shufeng Wang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Brassica Napus ◽  
Seed Yield ◽  
Oil Content ◽  
Seed Oil ◽  
Genome Wide Association Study ◽  
Oil Quality ◽  
Oilseed Crop ◽  
Seed Oil Content ◽  
Biological Yield

Abstract Background In the oilseed crop Brassica napus (rapeseed), various metabolic processes influence seed oil content, oil quality, and biological yield. However, the role of plastid membrane proteins in these traits has not been explored. Results Our genome-wide association study (GWAS) of 520 B. napus accessions identified the chloroplast membrane protein-localized FATTY ACID EXPORTER 1-1 (FAX1-1) as a candidate associated with biological yield. Seed transcript levels of BnaFAX1-1 were higher in a cultivar with high seed oil content relative to a low-oil cultivar. BnaFAX1-1 was localized to the plastid envelope. When expressed in Arabidopsis thaliana, BnaFAX1-1 enhanced biological yield (total plant dry matter), seed yield and seed oil content per plant. Likewise, in the field, B. napus BnaFAX1-1 overexpression lines (BnaFAX1-1-OE) displayed significantly enhanced biological yield, seed yield, and seed oil content compared with the wild type. BnaFAX1-1 overexpression also up-regulated gibberellic acid 4 (GA4) biosynthesis, which may contribute to biological yield improvement. Furthermore, oleic acid (C18:1) significantly increased in BnaFAX1-1 overexpression seeds. Conclusion Our results indicated that the putative fatty acid exporter BnaFAX1-1 may simultaneously improve seed oil content, oil quality and biological yield in B. napus, providing new approaches for future molecular breeding.

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