Yield, oil constituents, and protein content of evening primrose (Oenothera biennis L.) seeds depending on harvest time, harvest method and nitrogen application

Ghasemnezhad, Azim; Honermeier, Bernd

doi:10.1016/j.indcrop.2007.12.006

Cited by 35 publications

(27 citation statements)

References 25 publications

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“…In several studies, it was found that seed oil content (oil concentration) decreased or responded weakly to increase in N supply, due to the concomitant increase in heavier protein production under high N nutrition (Abbadi et al 2008, Ghasemnezhad andHonermeier 2008). This could be a result of the competition between protein synthesis and fatty acid synthesis for carbon building blocks.…”

Section: Discussionmentioning

confidence: 99%

“…This could be a result of the competition between protein synthesis and fatty acid synthesis for carbon building blocks. Ghasemnezhad and Honermeier (2008) also suggested that fatty acid synthesis has higher carbohydrate requirement than protein. Consequently, the increased N supply would enhance protein synthesis at the expense of fatty acid synthesis for primrose seeds.…”

Section: Discussionmentioning

confidence: 99%

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Effect of fertilizer application on photosynthesis and oil yield of Jatropha curcas L.

Yong

Tan

et al. 2010

Photosynt.

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The use of Jatropha curcas oil as a source of biofuel has been well-explored. However, the physiological and growth studies of J. curcas have received considerably lesser attention. In this study, leaf gas exchange measurements and leaf nitrogen content were determined for four varieties of J. curcas, grown in the field or in pots. Based on stable carbon isotope analysis (δ 13 C) and gas-exchange studies, J. curcas is a C 3 sun plant and the range of leaf photosynthetic rates (or CO 2 assimilation rates, P Nmax ) were typically between 7 and 25 µmol(CO 2 ) m -2 s -1 and light saturation generally occurred beyond 800 µmol(quanta) m -2 s -1 . Higher rates of leaf photosynthesis were generally obtained with the mature leaves. In addition, increased foliar P Nmax were recorded in potted J. curcas variety Indiana with increasing nitrogen (N) nutrition levels. These plants also showed greater growth, increased leaf N content, higher maximum CO 2 assimilation capacity (P NhighCO2 ) and chlorophyll (Chl) content, indicating the potential of optimizing the growth of Jatropha by varying fertilizer nutrient levels. A rapid assessment for leaf N using a nondestructive and portable Chl meter had been established for J. curcas. This approach will allow repeated sampling of the same plant over time and thus enable the monitoring of the appropriate levels of soil fertility to achieve good Jatropha plantation productivity. High N nutrition improved the overall plant oil yield by increasing the total number of fruits/seeds produced per plant, while not affecting the intrinsic seed oil content.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of fertilizer application on photosynthesis and oil yield of Jatropha curcas L.

Yong

Tan

et al. 2010

Photosynt.

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“…High photosynthetic activity can accelerate the seed maturity. As the highest polyunsaturated fatty acid accumulation is expected in fully ripened seed, this might be a reason why nitrogen increases the content of linoleic acid (Ghasemnezhad & Honermeier, 2008).…”

Section: Fatty Acid Sterol and Tocopherol Compositionmentioning

confidence: 99%

Effect of nitrogen fertilisation rates on the content of fatty acids, sterols, tocopherols and phenolic compounds, and on the oxidative stability of walnuts

Verardo

Riciputi

Sorrenti

et al. 2013

LWT - Food Science and Technology

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“…GLA in general is not commonly found in seed oils. Only a few other species such as Echium [1], evening primrose [3] and black currant [1] seeds also contain products of the D6-desaturase enzyme (GLA and SDA, respectively). The formation of GLA and SDA is considered the rate-limiting step in the production of long-chain (C [ 20) polyunsaturated fatty acids (LC-PUFA) in humans [4].…”

mentioning

confidence: 99%

Investigation of γ‐Linolenic Acid and Stearidonic Acid Biosynthesis During a Life Cycle of Borago officinalis L.

Stähler

Quek

Miller

2011

J Americ Oil Chem Soc

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This study investigated the levels of c-linolenic (GLA, 18:3n-6) and stearidonic acid (SDA, in various parts of the borage plant (Borago officinalis L.) to elucidate D6-desaturase activity. Lipid class and fatty acid (FA) composition during germination of the seeds and FA composition of various borage parts were determined as well as FA compositions of neutral lipids (NL), polar lipids (PL), glycolipids (GL) and monogalactosyl diacylglycerols (MGDG) of borage leaves. When seeds were germinated for 12 days in the dark then exposed to light for 8 h, an overall decrease in oil content was seen with a significant increase in PL from 0.2 to 39.1%. An increase in SDA (from 0.2 to 0.6 g/100 g oil) indicated minor FA synthesis during germination and therefore, D6-desaturase activity with the most marked increase after light exposure. The FA compositions of developing and mature seeds were similar, suggesting oil/FA synthesis takes place at the initial stage of seed development. Among all the borage parts, the leaves had the highest amounts of a-linolenic acid (ALA, 18:3n-3) (36.2%), indicating D15-desaturase activity, and SDA (25.2%), indicating D6-desaturase activity. In leaves, the GL and especially, MGDG fractions had the highest amounts of SDA (31.8 and 39.8%, respectively), indicating that D6-desaturase is most active in chloroplasts. Leaves and developing seeds appear to be the major sources of D6-desaturase in borage, associated with different organelles in the different tissues.

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Yield, oil constituents, and protein content of evening primrose (Oenothera biennis L.) seeds depending on harvest time, harvest method and nitrogen application

Cited by 35 publications

References 25 publications

Effect of fertilizer application on photosynthesis and oil yield of Jatropha curcas L.

Effect of fertilizer application on photosynthesis and oil yield of Jatropha curcas L.

Effect of nitrogen fertilisation rates on the content of fatty acids, sterols, tocopherols and phenolic compounds, and on the oxidative stability of walnuts

Investigation of γ‐Linolenic Acid and Stearidonic Acid Biosynthesis During a Life Cycle of Borago officinalis L.

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