7 results on '"Rongshao HUANG"'
Search Results
2. Variation in flavonoid and antioxidant activities of Pyrrosia petiolosa (Christ) Ching from different geographic origins
- Author
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Jianhua Chen, Shan Ning, Xuan Lu, Wei Xiang, Xiao Zhou, Yuanyuan Bu, Liangbo Li, and Rongshao Huang
- Subjects
Plant Science - Abstract
Pyrrosia petiolosa (Christ) Ching has both medicinal and health benefits in China. The potential antioxidant activities of P. petiolosa, which are mainly attributed to its flavonoids, have attracted much attention in recent years. The present study aimed to determine the concentration of flavonoid components and evaluate the relative antioxidant activities of P. petiolosa from different geographic origins using a UPLC-MRM-MS-based metabolomics approach. In total, 97 flavonoid components were identified, and their concentrations in the samples from different geographic locations showed significant variation. Thirteen flavonoid components were identified as potential biomarkers for distinguishing between the two major regions, Guizhou (GZ) and Guangxi (GX). The GZ group showed higher total flavonoid content, free radical scavenging activities, and ferric reducing antioxidant power. The well positive correlations were found between the antioxidant capacities and some flavonoid markers. The ecogeographic factors, namely altitude and longitude, play a crucial role in the difference of antioxidant activities and flavonoids concentration. These results indicate that P. petiolosa is rich in flavonoid compounds and is a promising source of natural antioxidants, providing a basis for the quality control of P. petiolosa.
- Published
- 2023
3. Autotoxicity in Panax notoginseng of root exudatesand their allelochemicals
- Author
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Wei Xiang, Jianhua Chen, Fengyuan Zhang, Rongshao Huang, and Liangbo Li
- Subjects
Plant Science - Abstract
The growth of Panax notoginseng (Burk.) F. H. Chen is frequently hindered due to replanting failure. In the present study, the objective is to determine whether root exudates from P. notoginseng have autotoxicity and identification of allelochemicals from root exudates or rhizosphere soil. We investigated autotoxicity in P. notoginseng using seedling emergence bioassays and hydroponic culture. The allelochemicals in the soils and root exudates were identified with GC-MS, and the autotoxicity of the identified key allelochemicals was investigated by bioassay. The results showed that the root exudates, and extracts from consecutively cultivated soils also showed significant autotoxicity against seedling emergence and growth. In the non-renewed culture solution without activated charcoal (AC), the fresh and dry mass of P. notoginseng tubers of roots was reduced by about half compared to the addition with AC. A total of 44 different components from all samples were defined by GC-MS analyses. Furthermore, the results of multiple statistical analysis showed a t the difference among cultivated soil, uncultivated soil and root exudates. Bioassay of the identified allelochemicals revealed that benzoic acid, phthalic acid, palmitic acid, and stearic acid significantly affected the root growth of P. notoginseng. These substances at 100 μM more significantly decreased the number of lateral roots. Our results demonstrated that autotoxicity results in replant failure of P. notoginseng.
- Published
- 2022
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4. Genome-Wide Identification of R2R3-MYB Transcription Factors: Discovery of a 'Dual-Function' Regulator of Gypenoside and Flavonol Biosynthesis in Gynostemma pentaphyllum
- Author
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Ding Huang, Ruhong Ming, Shiqiang Xu, Shaochang Yao, Liangbo Li, Rongshao Huang, and Yong Tan
- Subjects
R2R3-MYB gene family ,flavonol ,Gynostemma pentaphyllum ,food and beverages ,gypenoside ,Plant culture ,Plant Science ,transcription factor ,SB1-1110 - Abstract
The R2R3-MYB gene family participates in several plant physiological processes, especially the regulation of the biosynthesis of secondary metabolites. However, little is known about the functions of R2R3-MYB genes in Gynostemma pentaphyllum (G. pentaphyllum), a traditional Chinese medicinal herb that is an excellent source of gypenosides (a class of triterpenoid saponins) and flavonoids. In this study, a systematic genome-wide analysis of the R2R3-MYB gene family was performed using the recently sequenced G. pentaphyllum genome. In total, 87 R2R3-GpMYB genes were identified and subsequently divided into 32 subgroups based on phylogenetic analysis. The analysis was based on conserved exon–intron structures and motif compositions within the same subgroup. Collinearity analysis demonstrated that segmental duplication events were majorly responsible for the expansion of the R2R3-GpMYB gene family, and Ka/Ks analysis indicated that the majority of the duplicated R2R3-GpMYB genes underwent purifying selection. A combination of transcriptome analysis and quantitative reverse transcriptase-PCR (qRT-PCR) confirmed that Gynostemma pentaphyllum myeloblastosis 81 (GpMYB81) along with genes encoding gypenoside and flavonol biosynthetic enzymes exhibited similar expression patterns in different tissues and responses to methyl jasmonate (MeJA). Moreover, GpMYB81 could bind to the promoters of Gynostemma pentaphyllum farnesyl pyrophosphate synthase 1 (GpFPS1) and Gynostemma pentaphyllum chalcone synthase (GpCHS), the key structural genes of gypenoside and flavonol biosynthesis, respectively, and activate their expression. Altogether, this study highlights a novel transcriptional regulatory mechanism that suggests that GpMYB81 acts as a “dual-function” regulator of gypenoside and flavonol biosynthesis in G. pentaphyllum.
- Published
- 2022
5. Comparative transcriptomic analysis identifies KcMYB1 as a R2R3-MYB anthocyanin activator in Kadsura coccinea
- Author
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Ding, Huang, Shiqiang, Xu, Yanhong, Qin, Yingjie, Li, Ruhong, Ming, Rongshao, Huang, Jihua, Wang, and Yong, Tan
- Subjects
Anthocyanins ,Gene Expression Regulation, Plant ,Kadsura ,Fruit ,Genetics ,Plant Science ,General Medicine ,Transcriptome ,Agronomy and Crop Science ,Plant Proteins - Abstract
Fruit color, as an important appearance attribute, is crucial for attracting consumers. However, the underlying mechanism regulating mature fruit color formation in Kadsura coccinea remains unclear. Here, a comprehensive metabolomics and transcriptomics analysis was performed to investigate the molecular mechanisms of anthocyanin accumulation between two K. coccinea cultivars with different mature fruit colors-'Dahong No. 1' (red) and 'Jinhu' (yellow). Targeted metabolomic analysis revealed high anthocyanin levels, most of which were cyanidin and delphinidin derivatives, in 'Dahong No. 1' mature fruit peel. The SNP analysis indicated that the two different cultivars had similar genetic background. Moreover, comparative transcriptomic analysis demonstrated that differentially expressed genes (DEGs) were related to flavonoid biosynthesis and metabolic process in the two K. coccinea cultivars. Gene expression profiling data showed that the structural and regulatory genes associated with anthocyanin biosynthesis were significantly upregulated in 'Dahong No. 1' mature fruit peel, which was verified by quantitative real-time polymerase chain reaction (qRT-PCR). Notably, the key anthocyanin activator KcMYB1 was identified, which was significantly upregulated in 'Dahong No. 1' compared with 'Jinhu'. We further confirmed that KcMYB1 actively regulated the accumulation of anthocyanin by ectopic expression in vivo. Furthermore, allelic constitution of KcMYB1 in K. coccinea were investigated. The present study can provide insights for understanding the regulatory mechanisms of anthocyanin differential accumulation in the mature fruits of K. coccinea.
- Published
- 2022
6. Genome-Wide Identification of R2R3-MYB Transcription Factors: Discovery of a 'Dual-Function' Regulator of Gypenoside and Flavonol Biosynthesis in
- Author
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Ding, Huang, Ruhong, Ming, Shiqiang, Xu, Shaochang, Yao, Liangbo, Li, Rongshao, Huang, and Yong, Tan
- Subjects
R2R3-MYB gene family ,flavonol ,Gynostemma pentaphyllum ,food and beverages ,gypenoside ,Plant Science ,transcription factor ,Original Research - Abstract
The R2R3-MYB gene family participates in several plant physiological processes, especially the regulation of the biosynthesis of secondary metabolites. However, little is known about the functions of R2R3-MYB genes in Gynostemma pentaphyllum (G. pentaphyllum), a traditional Chinese medicinal herb that is an excellent source of gypenosides (a class of triterpenoid saponins) and flavonoids. In this study, a systematic genome-wide analysis of the R2R3-MYB gene family was performed using the recently sequenced G. pentaphyllum genome. In total, 87 R2R3-GpMYB genes were identified and subsequently divided into 32 subgroups based on phylogenetic analysis. The analysis was based on conserved exon–intron structures and motif compositions within the same subgroup. Collinearity analysis demonstrated that segmental duplication events were majorly responsible for the expansion of the R2R3-GpMYB gene family, and Ka/Ks analysis indicated that the majority of the duplicated R2R3-GpMYB genes underwent purifying selection. A combination of transcriptome analysis and quantitative reverse transcriptase-PCR (qRT-PCR) confirmed that Gynostemma pentaphyllum myeloblastosis 81 (GpMYB81) along with genes encoding gypenoside and flavonol biosynthetic enzymes exhibited similar expression patterns in different tissues and responses to methyl jasmonate (MeJA). Moreover, GpMYB81 could bind to the promoters of Gynostemma pentaphyllum farnesyl pyrophosphate synthase 1 (GpFPS1) and Gynostemma pentaphyllum chalcone synthase (GpCHS), the key structural genes of gypenoside and flavonol biosynthesis, respectively, and activate their expression. Altogether, this study highlights a novel transcriptional regulatory mechanism that suggests that GpMYB81 acts as a “dual-function” regulator of gypenoside and flavonol biosynthesis in G. pentaphyllum.
- Published
- 2021
7. Lectotypification of Callicarpa integerrima (Lamiaceae)
- Author
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Rongshao Huang, Zhiwei Su, and Zhong-Hui Ma
- Subjects
biology ,Genus ,Verbenaceae ,Botany ,Callicarpa ,Phylogenetic study ,Lamiaceae ,Plant Science ,biology.organism_classification ,Eudicots ,Endemism ,Ecology, Evolution, Behavior and Systematics ,Viticoideae - Abstract
The genus Callicarpa Linnaeus (1753: 111) with about 140 species is mainly distributed in temperate, subtropical and tropical Asia, America, Australia and the Pacific Islands (Harley et al. 2004; Bramley 2013; Zhang 2014; Ma & Su 2015), with 48 species and 13 varieties occurring in China (Chen & Gilbert 1994). Callicarpa was long thought to be included in Verbenaceae. However, based on morphological and molecular phylogenetic studies on the Verbenaceae and Lamiaceae, Callicarpa was transferred to Lamiaceae, along with Viticoideae and several other genera (Bramley 2009, 2013; Ma et al. 2015). During a taxonimic study of this genus in China, the name C. integerrima Champion ex Bentham (1853: 135) tourned out not yet typified. C. integerrima is currently accepted as endemic species of China (Chen & Gilbert 1994) and was described based on plants collected in Hongkong (Bentham 1853), but no specimens were cited in the protologue. We traced in K two duplicate specimens (K barcodes K000674744 and K000674745) collected by J.G. Champion in Hongkong that fit the protologue and can be regarded as syntypes (Art. 9.5 of the ICN, McNeill et al. 2012). The specimen K barcode K000674744 is better preserved and complete (flowers and fruits), and is selected here as the lectotype.
- Published
- 2015
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