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196 result(s) for "Zeng, Yawen"
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Molecular Mechanism and Health Role of Functional Ingredients in Blueberry for Chronic Disease in Human Beings
Functional ingredients in blueberry have the best health benefits. To obtain a better understanding of the health role of blueberry in chronic disease, we conducted systematic preventive strategies for functional ingredients in blueberry, based on comprehensive databases, especially PubMed, ISI Web of Science, and CNKI for the period 2008–2018. Blueberry is rich in flavonoids (mainly anthocyanidins), polyphenols (procyanidin), phenolic acids, pyruvic acid, chlorogenic acid, and others, which have anticancer, anti-obesity, prevent degenerative diseases, anti-inflammation, protective properties for vision and liver, prevent heart diseases, antidiabetes, improve brain function, protective lung properties, strong bones, enhance immunity, prevent cardiovascular diseases, and improve cognitive decline. The anthocyanins and polyphenols in blueberry are major functional ingredients for preventive chronic disease. These results support findings that blueberry may be one of the best functional fruits, and further reveals the mechanisms of anthocyanins and polyphenols in the health role of blueberry for chronic disease. This paper may be used as scientific evidence for developing functional foods, nutraceuticals, and novel drugs of blueberry for preventive chronic diseases.
Functional phytochemicals in tomatoes: biosynthesis, gene regulation, and human health implications
The nutritional and health-promoting properties of tomatoes (Solanum lycopersicum), a highly significant crop, are attributed to their abundance of beneficial components, such as flavonoids, phenolic compounds, and carotenoids (including lycopene and β-carotene). The occurrence of these bioactive molecules is influenced by genetic, environmental, and agronomic factors, with ripening playing a critical role in their accumulation. This abstract delves into the molecular machinery controlling phytochemical accumulation, with a specific focus on the regulation of lycopene biosynthesis. The RIPENING-INHIBITOR (RIN) transcription factor, a master regulator of fruit maturation, exerts direct control over lycopene accumulation by binding to the promoters of critical biosynthetic genes. RIN directly activates the expression of PHYTENE SYNTHASE 1 (PSY1), the key rate limiting enzyme committing metabolic flux to the carotenoid pathway, and PDS, encoding phytocene desaturase, thereby orchestrating the massive lycopene synthesis characteristic of the ripening transition. Strategies for the biofortification of tomato fruits have leveraged this understanding through targeted genetic manipulation. Overexpression of key enzymes, such as the bacterial CrtB (phytoene synthase) or manipulation of the endogenous PSY1, has successfully enhanced lycopene flux. More profoundly, the manipulation of transcription factors offers a powerful multi-gene approach. For instance, the overexpression of fruit-specific promoters driving RIN or other regulators like HYR (High Pigment) can simultaneously improve the entire pathway, leading to substantial increases in lycopene content. Flavonoids and phenolic compounds are produced by the phenylpropanoid pathway, which is regulated by enzymes such as chalcone synthase (CHS) and phenylalanine ammonialyase (PAL). Gene regulation of these pathways involves a complex interplay of transcription factors (e.g., RIN, NOR, and HY5) and phytohormones (e.g., ethylene and abscisic acid), which modulate expression patterns during fruit development and stress responses. Phytochemical levels are also significantly influenced by environmental factors; for instance, optimal lycopene synthesis occurs at 20-25 °C, while higher temperatures above 30 °C inhibit lycopene accumulation and promote beta-carotene synthesis, a shift mediated by the temperature-sensitive expression of key genes, including those regulated by RIN. Naturally occurring or induced mutations in genes such as DET1 and HP2, which are negative regulators of light signal transduction, result in high pigment phenotypes with dramatically increased lycopene and flavonoid content. The successful application of metabolic engineering and transcription factor manipulation for biofortification holds immense promises for developing next-generation tomato cultivars with amplified health-promoting properties, directly linking agricultural science to improved human health outcomes through the mitigation of chronic diseases like cancer and cardiovascular disorders.
Natural variation in CTB4a enhances rice adaptation to cold habitats
Low temperature is a major factor limiting rice productivity and geographical distribution. Improved cold tolerance and expanded cultivation to high-altitude or high-latitude regions would help meet growing rice demand. Here we explored a QTL for cold tolerance and cloned the gene, CTB4a (cold tolerance at booting stage), encoding a conserved leucine-rich repeat receptor-like kinase. We show that different CTB4a alleles confer distinct levels of cold tolerance and selection for variation in the CTB4a promoter region has occurred on the basis of environmental temperature. The newly generated cold-tolerant haplotype Tej -Hap-KMXBG was retained by artificial selection during temperate japonica evolution in cold habitats for low-temperature acclimation. Moreover, CTB4a interacts with AtpB, a beta subunit of ATP synthase. Upregulation of CTB4a correlates with increased ATP synthase activity, ATP content, enhanced seed setting and improved yield under cold stress conditions. These findings suggest strategies to improve cold tolerance in crop plants. Low temperature is a major factor limiting productivity in rice. Here the authors show that the CTB4a gene confers cold tolerance to japonica varieties adapted to cold habitats at the booting stage of development, and propose that CTB4a acts via an interaction with the beta subunit of ATP synthase.
Therapeutic Role of Functional Components in Alliums for Preventive Chronic Disease in Human Being
Objectives. Functional components in alliums have long been maintained to play a key role in modifying the major risk factors for chronic disease. To obtain a better understanding of alliums for chronic disease prevention, we conducted a systematic review for risk factors and prevention strategies for chronic disease of functional components in alliums, based on a comprehensive English literature search that was conducted using various electronic search databases, especially the PubMed, ISI Web of Science, and CNKI for the period 2007–2016. Allium genus especially garlic, onion, and Chinese chive is rich in organosulfur compounds, quercetin, flavonoids, saponins, and others, which have anticancer, preventive cardiovascular and heart diseases, anti-inflammation, antiobesity, antidiabetes, antioxidants, antimicrobial activity, neuroprotective and immunological effects, and so on. These results support Allium genus; garlic and onion especially may be the promising dietotherapeutic vegetables and organopolysulfides as well as quercetin mechanism in the treatment of chronic diseases. This review may be used as scientific basis for the development of functional food, nutraceuticals, and alternative drugs to improve the chronic diseases.
Genetic Divergence and Functional Significance of Bioactive Compounds in Rice and Barley: Implications for Biofortification and Human Health
The functional components in cereals (rice and barley), such as gamma-aminobutyric acid (GABA), resistant starch (RS), and alkaloids, play crucial roles in human health, offering benefits such as improved cardiovascular function, enhanced gut microbiota, and potential anticancer properties. Rice (Oryza sativa) and barley (Hordeum vulgare) are key dietary staples with distinct genetic architectures influencing the biosynthesis and accumulation of these bioactive compounds. In this study, we explore the interaction and divergence of gene loci associated with GABA, RS, and alkaloid pathways in rice and barley, leveraging comparative genomics to identify conserved and species-specific regulatory mechanisms. We highlight key quantitative trait loci (QTLs) and candidate genes, such as GAD (glutamate decarboxylase) for GABA synthesis, SSIIa and GBSS for RS formation, and alkaloid biosynthesis genes including CYP80G2. Additionally, we discuss the health implications of these functional components, including their roles in reducing hypertension, managing diabetes, and exhibiting neuroprotective effects. Understanding the genetic differences between rice and barley in accumulating these compounds can guide biofortification strategies to enhance nutritional quality in cereal crops, ultimately benefiting human health and dietary outcomes.
A Systematic Review of the Pharmacology, Toxicology and Pharmacokinetics of Matrine
Matrine (MT) is a naturally occurring alkaloid and an bioactive component of Chinese herbs, such as and Radix . Emerging evidence suggests that MT possesses anti-cancer, anti-inflammatory, anti-oxidant, antiviral, antimicrobial, anti-fibrotic, anti-allergic, antinociceptive, hepatoprotective, cardioprotective, and neuroprotective properties. These pharmacological properties form the foundation for its application in the treatment of various diseases, such as multiple types of cancers, hepatitis, skin diseases, allergic asthma, diabetic cardiomyopathy, pain, Alzheimer's disease (AD), Parkinson's disease (PD), and central nervous system (CNS) inflammation. However, an increasing number of published studies indicate that MT has serious adverse effects, the most obvious being liver toxicity and neurotoxicity, which are major factors limiting its clinical use. Pharmacokinetic studies have shown that MT has low oral bioavailability and short half-life . This review summarizes the latest advances in research on the pharmacology, toxicology, and pharmacokinetics of MT, with a focus on its biological properties and mechanism of action. The review provides insight into the future of research on traditional Chinese medicine.
Conferring of drought tolerance in wheat (Triticum aestivum L.) genotypes using seedling indices
Wheat is the most widely grown and consumed crop because of its economic and social benefits. This crop is more important globally for food and feed, and its productivity is particularly vulnerable to abiotic factors. In this study, 40 wheat genotypes were studied to access the drought tolerance level using completely randomized design (CRD) in 250 ml disposable cups through morpho–physiological attributes at seedling stage. The wheat germplasm was tested under normal and two drought stress level D1 (50% field capacity) and D2 (75% field capacity) for different seedling attributes such as germination percentage (GP), chlorophyll content (CC), shoot length (SL), root length (RL), shoot fresh weight (SFW), root fresh weight (RFW), seedling fresh weight (SDFW), shoot dry weight (SDW), root dry weight (RDW), relative water content (RWC), root/shoot ratio (RS), and seedling dry weight (SeDW). The results of analysis of variance (ANOVA) and spider analysis indicate that significant amount of genetic variation was present and behavior of studied germplasm showed different behavior in different environment. The correlation analysis showed that root length has significantly positive association with root/shoot ratio, dry weight, and fresh weight while negatively correlated with shoot length and relative water content. Based on the positively associated traits, the studied genetic material would improve genetic gain for drought tolerance. The multivariate analysis showed that out 13 principal components only five PCs were significant and has eigenvalue > 1, cumulatively showed 82.33, 83.07, and 97.34% of total variation under normal, D1 and D2 conditions, respectively. Significantly, the result of spider graph and multivariate analysis showed that genotypes G47, G48, G65, G68, and G80 performed well in all drought stress conditions and considered as drought-tolerant genotypes. The best performing genotypes can be used in future breeding programs. The selection on the bases of studied attributes is effective for development of drought-tolerant and high-yielding varieties for sustainable food security.
Stepwise selection of natural variations at CTB2 and CTB4a improves cold adaptation during domestication of japonica rice
• The improvement of cold adaptation has contributed to the increased growing area of rice. Standing variation and de novo mutation are distinct natural sources of beneficial alleles in plant adaptation. However, the genetic mechanisms and evolutionary patterns underlying these sources in a single population during crop domestication remain elusive. • Here we cloned the CTB2 gene, encoding a UDP-glucose sterol glucosyltransferase, for cold tolerance in rice at the booting stage. A single standing variation (I408V) in the conserved UDPGT domain of CTB2 originated from Chinese Oryza rufipogon and contributed to the cold adaptation of Oryza sativa ssp. japonica. • CTB2 is located in a 56.8 kb region, including the previously reported gene CTB4a in which de novo mutation arose c. 3200 yr BP in Yunnan province, China, conferring cold tolerance. Standing variation of CTB2 and de novo mutation of CTB4a underwent stepwise selection to facilitate cold adaptation to expand rice cultivation from high-altitude to high-latitude regions. • These results provide an example of stepwise selection on two kinds of variation and describe a new molecular mechanism of cold adaptation in japonica rice.
Natural variation of CTB5 confers cold adaptation in plateau japonica rice
During cold acclimation in high-latitude and high-altitude regions, japonica rice develops enhanced cold tolerance, but the underlying genetic basis remains unclear. Here, we identify CTB5, a homeodomain-leucine zipper (HD-Zip) transcription factor that confers cold tolerance at the booting stage in japonica rice. Four natural variations in the promoter and coding regions enhance cold response and transcriptional regulatory activity, enabling the favorable CTB5 KM allele to improve cold tolerance. CTB5 interacts with OsHox12 and targets gibberellin (GA) metabolism genes to promote GAs accumulation in anthers and facilitate tapetum development under cold stress. Moreover, CTB5 directly regulates PYL9 and improves cold tolerance at the seedling stage by reducing reactive oxygen species (ROS) accumulation. The CTB5 KM allele is selected during the cold acclimation of japonica rice to plateau habitats in Yunnan Province. Our findings provide insights into the mechanisms underlying cold adaptation in plateau japonica rice and offer potential targets for breeding cold-tolerant rice varieties. Mechanisms confer to the enhanced cold tolerance in japonica rice have not been fully elucidated. Here, the authors report a homeodomain-leucine zipper (HD-Zip) I transcription factor encode gene CTB5 is responsible for japonica rice cold tolerance by interacting with genes in gibberellin and abscisic acid pathways.
Gene silencing, knockout and over-expression of a transcription factor ABORTED MICROSPORES (SlAMS) strongly affects pollen viability in tomato (Solanum lycopersicum)
Background The tomato ( Solanum lycopersicum L.) is an economically valuable crop grown worldwide. Because the use of sterile males reduces the cost of F1 seed production, the innovation of male sterility is of great significance for tomato breeding. The ABORTED MICROSPORES gene (AMS), which encodes for a basic helix-loop-helix (bHLH) transcription factor, has been previously indicated as an essential gene for tapetum development in Arabidopsis and rice. To determine the function of the SlAMS gene ( AMS gene from S. lycopersicum ) and verify whether it is a potential candidate gene for generating the male sterility in tomato, we used virus-induced gene silencing (VIGS), CRISPR/Cas9-mediated genome editing and over-expression technology to transform tomato via Agrobacterium infection. Results Here, the full-length SlAMS gene with 1806 bp from S. lycopersicum (Accession No. MK591950.1) was cloned from pollen cDNA. The results of pollen grains staining showed that, the non-viable pollen proportions of SlAMS -silenced (75%), −knockouted (89%) and -overexpressed plants (60%) were significantly higher than the wild type plants (less than 10%; P  < 0.01). In three cases, the morphology of non-viable pollen grains appeared tetragonal, circular, atrophic, shriveled, or otherwise abnormally shaped, while those of wild type appeared oval and plump. Furthermore, the qRT-PCR analysis indicated that SlAMS in anthers of SlAMS -silenced and -knockouted plants had remarkably lower expression than in that of wild type ( P  < 0.01), and yet it had higher expression in SlAMS- overexpressed plants ( P  < 0.01). Conclusion In this paper, Our research suggested alternative approaches to generating male sterility in tomato, among which CRISPR/Cas9-mediated editing of SlAMS implied the best performance. We also demonstrated that the downregulation and upregulation of SlAMS both affected the pollen formation and notably led to reduction of pollen viability, suggesting SlAMS might be essential for regulating pollen development in tomato. These findings may facilitate studies on clarifying the SlAMS- associated molecular regulatory mechanism of pollen development in tomato.