Untersuchungen über den Einfluß von Sorte und Standort auf den Tocopherolgehalt verschiedener Pflanzenöle

Marquard, R.

doi:10.1002/lipi.19900921106

Cited by 15 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Toc content in seeds of rape depends on the genotype and the interaction between the genotype and various environmental factors, of which fertilizer management is important (Marquard, 1985;1990;Dolde et al, 1999;Marwede et al, 2004;2005;Havlin et al, 2005;Rathke et al, 2005). N accounts for the largest amount of metabolic element that plants absorb from soil.…”

Section: Introductionmentioning

confidence: 99%

Response of seed tocopherols in oilseed rape to nitrogen fertilizer sources and application rates

Hussain

Jiang

Jabeen

et al. 2014

J. Zhejiang Univ. Sci. B

View full text Add to dashboard Cite

Tocopherols (Tocs) are vital scavengers of reactive oxygen species (ROS) and important seed oil quality indicators. Nitrogen (N) is one of the most important fertilizers in promoting biomass and grain yield in crop production. However, the effect of different sources and application rates of N on seed Toc contents in oilseed rape is poorly understood. In this study, pot trials were conducted to evaluate the effect of two sources of N fertilizer (urea and ammonium nitrate). Each source was applied to five oilseed rape genotypes (Zheshuang 72, Jiu-Er-1358, Zheshuang 758, Shiralee, and Pakola) at three different application rates (0.41 g/pot (N1), 0.81 g/pot (N2), and 1.20 g/pot (N3)). Results indicated that urea increased α-, γ-, and total Toc (T-Toc) more than did ammonium nitrate. N3 was proven as the most efficient application rate, which yielded high contents of γ-Toc and T-Toc. Highly significant correlations were observed between Toc isomers, T-Toc, and α-/γ-Toc ratio. These results clearly demonstrate that N sources and application rates significantly affect seed Toc contents in oilseed rape.

show abstract

Section: Introductionmentioning

confidence: 99%

Response of seed tocopherols in oilseed rape to nitrogen fertilizer sources and application rates

Hussain

Jiang

Jabeen

et al. 2014

J. Zhejiang Univ. Sci. B

View full text Add to dashboard Cite

show abstract

“…Velasco et al (2002) reported a range of variation for seed tocopherol content from 314 to 1024 mg/kg in evaluation of 36 sunflower hybrids grown over 13 locations. The tocopherol content of sunflower seeds is affected by the genotype and the environment, although the limited number of studies conducted to date have concluded that the factors have different relative effects (Marquard 1990;Alpaslan & Gu¨ndu¨z 2000;Velasco et al 2002). No breeding research has been conducted to develop sunflower germplasm with high tocopherol content.…”

Section: Introductionmentioning

confidence: 99%

Selection for contrasting seed tocopherol content in sunflower seeds

et al. 2010

View full text Add to dashboard Cite

SU MMARYSunflower oil, with more than 0 . 9 of tocopherols in the alpha-tocopherol form, supplies more vitamin E than any other vegetable oil. Thus far, no breeding to increase vitamin E levels in sunflower seeds has been conducted. The objective of the present research was to develop sunflower lines with high and low total seed tocopherol content through evaluation and subsequent selection of a large germplasm collection (952 sunflower entries). A range of variation from 119 to 491 mg/kg was found. Selection conducted from S 1 to S 4 plant generations allowed the isolation of line IAST-413, with an increased tocopherol content of 467 mg/kg compared to 251 mg/kg in the control line HA89, and line IAST-522, with a reduced tocopherol content of 73 mg/kg. Another accession with potentially high tocopherol content, but completely self-incompatible, was crossed to the line HA89 followed by plant-to-row selection up to the F 5 plant generation; it averaged 463 mg/kg compared to 240 mg/kg in HA89. Two field experiments carried out at Co´rdoba in southern Spain in 2006 and 2007 with different sowing dates confirmed that the increased tocopherol content in the selected lines was consistently expressed across environments. INTRODUCTIONVitamin E is a family of fat-soluble antioxidants that protect cellular membrane lipids against oxidative damage, which has been associated with a decreased risk of developing some forms of cancer, cardiovascular diseases and degenerative processes linked to disease (Packer & Obermu¨ller-Jevic 2002). The main naturally occurring compounds with vitamin E activity are tocopherols and tocotrienols. Tocopherols occur ubiquitously in plant tissues, with the highest concentrations being found in seeds. There are four tocopherols, alpha-, beta-, gamma-and delta-tocopherol, which differ in their vitamin E activities. Alpha-tocopherol exerts the highest vitamin E activity in animals (Pongracz et al. 1995). There is a large body of medical evidence pointing to the benefits for human health associated with daily, moderate, vitamin E supplementation (Bramley et al. 2000).Gamma-tocopherol, with only one-tenth the vitamin-E activity of alpha-tocopherol (Pongracz et al. 1995), is the predominant tocopherol derivative in most oilseeds (Padley et al. 1994). Sunflower, with more than 0 . 9 of tocopherols in the alpha-tocopherol form, represents a remarkable exception. The high vitamin E content of sunflower oil is being used by some manufacturers as a claim to attract consumers, even through fortification of the oil with either natural or synthetic alpha-tocopherol. Several brands of sunflower oil fortified with alpha-tocopherol are currently being marketed in Spain. Sunflower cultivars with increased concentrations of alpha-tocopherol in the seeds would produce oils with naturally enhanced vitamin E value.The tocopherol content in the extracted seed oil is the result of several factors, the most important being the tocopherol content in the seeds, the oil content in the seeds, the oil extraction system and t...

show abstract

“…It is possible that changes in intercepted PAR per plant could indirectly affect the tocopherol concentration via changes in oil concentration, but the literature disagrees on this point. A negative correlation between oil and tocopherol concentration has been found in sunflower (13) and several mustards (22). However, Velaszco et al (7) found no correlation between seed total tocopherol concentration and seed yield or seed oil concentration in sunflower.…”

mentioning

confidence: 96%

“…On the other hand, several investigations showed important variation in tocopherol concentration of seed oil of the same sunflower hybrid grown under different environments, i.e., different locations and different sowing dates (4,7,(11)(12)(13). However, the effect of environmental conditions during seed filling has received little attention.…”

mentioning

confidence: 97%

Tocopherol oil concentration in field‐grown sunflower is accounted for by oil weight per seed

Nolasco¹,

Aguirrezábal

Crapiste

2004

J Americ Oil Chem Soc

View full text Add to dashboard Cite

Tocopherols are natural antioxidants that increase the stability of fat-containing foods and perform important biological activities. Significant variations (389 to 1873 µg g oil −1 ) in the total tocopherol concentration of sunflower seed oil have been reported. The main objectives of this work were to determine the influence of intercepted photosynthetically active radiation on tocopherol concentration during seed filling and to establish and validate relationships between tocopherol concentration in oil and other quality variables of the seed. Seven sunflower hybrids were grown under good water and nutritional conditions in two similar experiments carried out in two contrasting environments. Treatments were applied to modify the amount of radiation intercepted per plant during seed filling in order to obtain a range in oil yield per plant and its components. Greater per plant intercepted radiation decreased the tocopherol concentration in oil. Tocopherol concentration decreased when oil weight per seed increased. Tocopherol concentration stabilized for oil weight per seed higher than 23 mg oil seed −1 . This exponential relationship accounted for 73% of the variability in tocopherol concentration (507 to 1203 µg g oil −1 ) despite differences in hull type, locations, hybrids, and radiation treatments. The proposed relationship acceptably predicted independent results. Crop management techniques could lead to seeds with greater concentrations of tocopherols.

show abstract

Untersuchungen über den Einfluß von Sorte und Standort auf den Tocopherolgehalt verschiedener Pflanzenöle

Cited by 15 publications

References 11 publications

Response of seed tocopherols in oilseed rape to nitrogen fertilizer sources and application rates

Response of seed tocopherols in oilseed rape to nitrogen fertilizer sources and application rates

Selection for contrasting seed tocopherol content in sunflower seeds

Tocopherol oil concentration in field‐grown sunflower is accounted for by oil weight per seed

Contact Info

Product

Resources

About