Oil Crop Science最新文献

Food provides abundant nutrients for human beings, but also has sensory functions and physiological regulation. Lipids are the main components of food as well as the important structural and functional components of cells. Nevertheless, lipids are easily oxidized by different ways, such as thermal oxidation and air oxidation. Lipid oxidation has adverse effects on food quality and human health. Therefore, efforts should be made to reduce lipid oxidation and improve its stability. This review focuses on important knowledge about lipid oxidation, including the concept of lipids and lipid oxidation, the main pathways and mechanisms of lipid oxidation, factors affecting lipid oxidation, strategies to improve the stability of lipid oxidation, and the recent research progress of lipid oxidation in food science and nutritional health.

DHA-enriched eggs have gained popularity due to their unique nutritional value, but their flavor can be challenging for some consumers to accept. The study analyzed the correlation of lipids and flavors in DHA-enriched egg yolks using comprehensive lipidomics and volatile compound analysis. The results showed that 411 lipids were detected in two egg yolk samples. Among them, 148 lipid species, including 48 DHA-containing lipids, were significantly higher in DHA-enriched egg yolks than in Common ones (P ​< ​0.05). Furthermore, of the 24 volatile compounds detected, the contents of benzaldehyde, heptanal, hexanal, decanal and 2-nonanone in DHA-enriched egg yolks were significantly higher than in Common egg yolks (P ​< ​0.05). The “fishy” smell characteristic of DHA-enriched egg yolks was mainly caused by volatile aldehydes, which may be produced through the hydrolysis of lipids in the egg yolk to free fatty acids and further oxidation. Analysis of the correlation network diagram revealed that phospholipids containing docosahexaenoic acid (DHA), linoleic acid, or oleic acid chains were the main contributors to the characteristic flavor of DHA-enriched egg yolks. Overall, this study explored the effect of different lipids on the flavor of DHA-enriched egg yolks and provided a theoretical basis for the production and improvement of DHA-enriched eggs.

To reveal the characteristic chemicals of walnuts from different origins, we analyzed fatty acid composition, tocopherols, phytosterols and total phenolic content (TPC) of walnuts from three main producing regions in China. The results showed that walnuts were rich in polyunsaturated fatty acids, and the ratio of ω-6 to ω-3 fatty acids was close to the recommendation of Chinese Nutrition Society. Moreover, walnuts contain high contents of tocopherols (331.20–414.71 ​mg/kg), phytosterols (97.17–110.35 ​mg/100 ​g) and phenols (38.51–48.08 ​mg GAE/kg). Significant chemical differences exist among walnuts from three production regions. The highest content of polyunsaturated fatty acids was found in walnuts from the northern China, the highest content of tocopherols in walnuts from southwest China, and the highest contents of phytosterol and TPC in walnuts from northwest China. However, there was no significant difference in the tocopherol, phytosterol and TPC content of walnuts between the Northern China and Northwest China. The above results provide important references for manufacturers and consumers to select suitable walnut scientifically and reasonably.

Rapeseed (Brassica napus L.) is the world's second produced oilseed and accounts for nearly 12% of world major vegetable oil production. For the last 10 years, the production, planting area, and yield of rapeseed have been stable, with improvement of seed quality and especially seed oil content. This paper presented the worldwide rapeseed research by using the bibliometric analysis of papers published during the period 2011–2021. In total, 7617 articles and reviews were included in this analysis. Our results showed that the global publication on rapeseed increased substantially in the past 11 years, and the number of publications of China grew significantly in particular. China was the largest contributor to rapeseed research with higher H-index value and number of citations compared to the other countries. China also had the largest number of leading universities and institutions, of which Huazhong Agricultural University was the most productive. The scientific mapping including co-authorship network of countries/regions and authors, and co-occurrence network of author keywords were analyzed using VOSviewer software. The most common rapeseed research topics included oil, rapeseed meal, yield, biodiesel, fatty acids, salt stress, and proteins, while the current research focused on topics such as: abiotic stress, evolution, expression analysis, phylogenetic analysis, heterosis, polyploidy, and transcriptomics. This paper depicts the knowledge structure of current global rapeseed research that may help direct the future studies for relevant researchers.

Sesame is mainly cultivated under traditional, low-input agro-systems. Recent breeding developments promoted the modernization and mechanization of sesame cultivation. However, only a few articles have been published concerning fertilization requirements for both modern and traditional agro-systems. In field trials at two locations, we determined the response of irrigated sesame to nitrogen (N). Three promising sesame lines were tested combining two irrigation levels with four N levels. At a high irrigation level, N had a significant effect on growth, branching, and consequently, seed yield exceeding two-ton ha⁻¹. A high N doze was accompanied by a decrease in the photosynthetic rate and leaf water potential. The δ¹³C confirmed lower stomatal conductance under high N treatments. Under deficit irrigation, the N level had a minor effect on the monitored parameters, indicating N fertilization was not efficient. Seed oil content was negatively correlated with seed N concentration. Our results question the necessity of N application when water is limited, as N fertilization promotes vigorous development that rapidly depletes soil water. Thus, water availability should be considered when developing an N management strategy. For high-yielding agro-systems, roughly 80–120 ​kg ​ha⁻¹ N is required for optimal yield, bearing in mind the negative association between seed-N and oil content.

Peanut (Arachis hypogaea L.) is an economically significant crop with aerial cleistogamous flowers and subterranean geocarpic fruit (pods). The formation of peanut pod requires movement of the embryo from air to ground and then development in the soil, which is a complex biological process involving transport and accumulation of sugars. Sugar transport proteins (STP) mediate the transport of monosaccharides in various physiological processes, including fertilization, ovary formation, and seed development. In this study, a total of 36 AhSTP genes (AhSTP1–36) containing the conserved sugar_tr motif were identified in the A. hypogaea genome. Phylogenetic analysis revealed that AhSTP genes were classified into four clades, and the arrangement of motifs in AhSTP proteins was similar within clades. Synteny analysis revealed that segmental duplication events have played an important role in the expansion of STP genes in peanut, and chromosome rearrangements might have facilitated the exchange of STP genes between the A and B sub-genomes. Transcriptome analyses revealed that the expression patterns of AhSTP genes varied among tissues. Hormone and abiotic stress treatments could up-regulate or down-regulate the expression of AhSTP genes, and low temperature had a major effect on the expression of most AhSTP genes. Four AhSTP genes (AhSTP3, AhSTP9, AhSTP19, and AhSTP28) were specifically expressed in the pod, indicating that these genes might be involved in pod formation and development in peanut. The unique expression of these four genes during pod construction and development was confirmed in two different type cultivars using quantitative real-time PCR analysis. Our findings provide new insights into the STP gene family in peanut and will aid future functional studies of AhSTP genes.

Safflower is widely cultivated and used as a dual-purpose medicinal oil worldwide. This research used the incoPat patent database to search the global safflower patents for nearly 20 years, aiming to reveal the development process and current situation of the safflower industry in China and around the world by analyzing patent application trends, patent technology characteristics, advantageous industries and regions, patent quality, etc. The analysis shows that safflower patent applications are generally increasing, and the period 2010-2016 is characterized by the rapid development of patent applications. The technical features of global patents are mainly concentrated in pharmaceutical preparations, cosmetics, food and health care, various beverages, animal feed, safflower cultivation and harvesting equipment, and safflower seed oil. During the rapid development of patent applications, safflower was further developed in cosmetics, edible oil, and harvesting equipment. In addition, patent applications in rheumatism and bone diseases have increased, with the potential for development. China is the leading region for researching and developing medicinal safflower patents, especially Shandong and Henan provinces. Foreign patents are more focused on the value development of safflower seed oil in food and chemicals. Compared to the major countries and organizations that apply for safflower patents on a global scale, the quality of Chinese safflower patents is medium, and more awareness of patent protection is required. This paper provides suggestions for the subsequent development of the safflower industry, summarizes and analyzes the development trend of safflower patents, and provides new ideas to obtain innovative patent results.

Flower color, an important rapeseed character, has great practical value and research significance. It has become an area of intensive research in recent years. This paper summarizes the latest research progress on rape flower color in terms of variety, source, pigment composition, formation mechanism, and omics. Moreover, it provides an overview of rape flower color breeding and omics.

In the last decade, some disease occurred on our experimental farms that had caused serious losses. They were not caused by fungi, bacteria or viruses. By loop-mediated isothermal amplification (LAMP) technique, the detection results pointed to the possible pathogen as phytoplasma. The investigation results implied that phytoplasmas could cause more than 13 kinds of symptoms in almost all parts of plants in B. napus L., including witches’ broom, multi-stems, aggregate main inflorescences, and flat stems. The incidences of these phytoplasma-associated diseases in our experimental farms rose from 1.61% in 2010 to 6.00% in 2021. Some phytoplasma infected plants died without any growing points. These studies would be helpful for detecting phytoplasmas diseases, selecting disease resistant germplasm and improving varieties with disease resistances in B. napus L.