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Guan Y, Liang Z, Li R, Guo Y, Dang L, Gong F, Xu S, Wang T, Bo N, Yang S, Jiang W, Zhang G, Zhao M, Chen J. Chemical composition and antioxidant activity of Polygonatum kingianum processed by the traditional method of "Nine Cycles of Steaming and Sun-Drying". Food Chem X 2024; 22:101292. [PMID: 38559439 PMCID: PMC10978476 DOI: 10.1016/j.fochx.2024.101292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 04/04/2024] Open
Abstract
Polygonatum kingianum Coll. et (Hemsl) is a famous Chinese traditional food and medicine analogous plant. The rhizome of P. kingianum showed a decrease in levels of alkaloids, amino acids and derivatives, terpenoids, and an increase in organic acid and saccharides when it was processed by the traditional method of "Nine Cycles of Steaming and Sun-Drying". The relative content of 341 metabolites were increased (fold change, FC > 2; variable importance in projection, VIP > 1 and P-value, P < 0.05); while 456 metabolites were decreased (FC < 0.5, VIP > 1, and P < 0.05). The changes in chemical components result in a decrease in numb taste and an increase in sweetness. The increased antioxidant activity was observed in the processed samples. Together, this work has advanced the mechanism of reducing numb taste and enhancing antioxidant activity in the resource plants, such as P. kingianum, processed by the traditional method.
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Affiliation(s)
- Yanhui Guan
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Zhengwei Liang
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Ruoyu Li
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- College of Tea Science, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Yunjiao Guo
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
- DeHong Teachers’ College, Mangshi 678400, People's Republic of China
| | - Lingjing Dang
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
- DeHong Vocational College, Mangshi 678400, People's Republic of China
| | - Fuming Gong
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
- DeHong Vocational College, Mangshi 678400, People's Republic of China
| | - Susu Xu
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Teng Wang
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- College of Tea Science, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Nianguo Bo
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- College of Tea Science, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Shengchao Yang
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Weiwei Jiang
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- College of Science, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Guanghui Zhang
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Ming Zhao
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- College of Tea Science, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
| | - Junwen Chen
- College of Agronomy and Biotechnology & The Key Laboratory of Medicinal Plant Biology of Yunnan Province & National Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming 650201, People's Republic of China
- Yunnan Characteristic Plant Extraction Laboratory, Kunming 650201, People's Republic of China
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Jiang C, Wang S, Wang Y, Wang K, Huang C, Gao F, Peng Hu H, Deng Y, Zhang W, Zheng J, Huang J, Li Y. Polyphenols from hickory nut reduce the occurrence of atherosclerosis in mice by improving intestinal microbiota and inhibiting trimethylamine N-oxide production. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 128:155349. [PMID: 38522315 DOI: 10.1016/j.phymed.2024.155349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 03/26/2024]
Abstract
BACKGROUND Trimethylamine N-oxide (TMAO), a metabolite produced by intestinal microbiota through metabolizing phosphatidylcholine, choline, l-carnitine and betaine in the diet, has been implicated in the pathogenesis of atherosclerosis (AS). Concurrently, dietary polyphenols have garnered attention for their potential to ameliorate obesity, diabetes and atherosclerosis primarily by modulating the intestinal microbial structure. Hickory (Carya cathayensis) nut, a polyphenol-rich food product favored for its palatability, emerges as a candidate for exploration. HYPOTHESIS/PURPOSE The relationship between polyphenol of hickory nut and atherosclerosis prevention will be firstly clarified, providing theoretical basis for the discovery of natural products counteracting TMAO-induced AS process in hickory nut. STUDY DESIGN AND METHODS Employing Enzyme-linked Immunosorbent Assay (ELISA) and histological examination of aortic samples, the effects of total polyphenol extract on obesity index, inflammatory index and pathological changes of atherosclerosis in C57BL/6 J mice fed with high-fat and high choline diet were evaluated. Further, the composition, abundance, and function of mouse gut microbiota were analyzed through 16srDNA sequencing. Concurrently, the levels of TMAO and the expression of key enzymes (CutC and FMO3) involved in its synthesis are quantified using ELISA, Western Blot and Real-Time Quantitative PCR (RT-qPCR). Additionally, targeted metabolomic profiling of the hickory nut polyphenol extract was conducted, accompanied by molecular docking simulations to predict interactions between candidate polyphenols and the CutC/FMO3 using Autodock Vina. Finally, the docking prediction were verified by microscale thermophoresis (MST) . RESULTS Polyphenol extracts of hickory nut improved the index of obesity and inflammation, and alleviated the pathological changes of atherosclerosis in C57BL/6 J mice fed with high-fat and high-choline diet. Meanwhile, these polyphenol extracts also changed the composition and function of intestinal microbiota, and increased the abundance of microorganisms in mice. Notably, the abundance of intestinal microbiota endowed with CutC gene was significantly reduced, coherent with expression of CutC catalyzing TMA production. Moreover, polyphenol extracts also decreased the expression of FMO3 in the liver, contributing to the reduction of TMAO levels in serum. Furthermore, metabonomic profile analysis of these polyphenol extracts identified 647 kinds of polyphenols. Molecular docking predication further demonstrated that Casuariin and Cinnamtannin B2 had the most potential inhibition on the enzymatic activities of CutC or FMO3, respectively. Notably, MST analysis corroborated the potential for direct interaction between CutC enzyme and available polyphenols such as Corilagin, (-)-Gallocatechin gallate and Epigallocatechin gallate. CONCLUSION Hickory polyphenol extract can mitigate HFD-induced AS by regulating intestinal microflora in murine models. In addition, TMA-FMO3-TMAO pathway may play a key role in this process. This research unveils, for the inaugural time, the complex interaction between hickory nut-derived polyphenols and gut microbial, providing novel insights into the role of dietary polyphenols in AS prevention.
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Affiliation(s)
- Chenyu Jiang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China
| | - Song Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China
| | - Yihan Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China
| | - Ketao Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China
| | - Chunying Huang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China
| | - Fei Gao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China
| | - Huang Peng Hu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China
| | - Yangyong Deng
- Hangzhou Yaoshengji Food Co., Ltd, Hangzhou, Zhejiang 310052, China
| | - Wen Zhang
- Suichang County Food and Drug Safety Inspection and Testing Center, Suichang, Zhejiang 323300, China
| | - Jian Zheng
- Suichang County Food and Drug Safety Inspection and Testing Center, Suichang, Zhejiang 323300, China
| | - Jianqin Huang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China.
| | - Yan Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Zhejiang 311300, China.
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Zhang C, Wang K, Ren H, Chang J, Yao X. Variation in pigments in pecan testa during kernel development and storage. Food Chem 2024; 438:137989. [PMID: 37992607 DOI: 10.1016/j.foodchem.2023.137989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/06/2023] [Accepted: 11/11/2023] [Indexed: 11/24/2023]
Abstract
The pecan (Carya illinoinensis) is an important tree nut worldwide. Browning of the testa during storage considerably reduces its quality. However, the pigments that cause browning and their accumulation patterns are poorly understood. We analyzed the color changes in the testa during the five developmental stages of the kernel after storage at room temperature to compare differences in their color and identify the pigments. Samples exhibiting different colors along with their corresponding -80 °C storage samples were selected for metabolomic analysis. A total of 591 phenolic compounds were detected, 52 phenolics showed regulatory effects on testa discoloration, and 59 metabolites were identified as possible precursors of the pigments. This study revealed the most thorough phenolic composition of pecan to date. Further, the findings provide new insights into the mechanisms of testa browning, deepens our understanding of the bioactive value of pecans, and contributes to the breeding of less browning-susceptible varieties.
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Affiliation(s)
- Chengcai Zhang
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China
| | - Kailiang Wang
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China
| | - Huadong Ren
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China
| | - Jun Chang
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China
| | - Xiaohua Yao
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China.
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Wang J, Zhang S, Kong J, Chang J. Pecan secondary metabolites influenced the population of Zeuzera coffeae by affecting the structure and function of the larval gut microbiota. Front Microbiol 2024; 15:1379488. [PMID: 38680914 PMCID: PMC11045946 DOI: 10.3389/fmicb.2024.1379488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/02/2024] [Indexed: 05/01/2024] Open
Abstract
Background The plant secondary metabolites (PSMs), as important plant resistance indicators, are important targets for screening plant insect resistance breeding. In this study, we aimed to investigate whether the population of Zeuzera coffeae (ZC) is affected by different varieties of Carya illinoinensis PSMs content. At the same time, the structure and function of the gut microbiome of ZC were also analyzed in relation to different pecan varieties. Methods We counted the populations of ZC larvae in four pecan varieties and determined the content of four types of PSMs. The structure and function of the larval gut microbiota were studied in connection to the number of larvae and the content of PSMs. The relationships were investigated between larval number, larval gut microbiota, and PSM content. Results We found that the tannins, total phenolics, and total saponins of 4 various pecans PSMs stifled the development of the ZC larval population. The PSMs can significantly affect the diversity and abundance of the larval gut microbiota. Enrichment of ASV46 (Pararhizobium sp.), ASV994 (Olivibacter sp.), ASV743 (Rhizobium sp.), ASV709 (Rhizobium sp.), ASV671 (Luteolibacter sp.), ASV599 (Agrobacterium sp.), ASV575 (Microbacterium sp.), and ASV27 (Rhizobium sp.) in the gut of larvae fed on high-resistance cultivars was positively associated with their tannin, total saponin, and total phenolic content. The results of the gut microbiome functional prediction for larvae fed highly resistant pecan varieties showed that the enriched pathways in the gut were related to the breakdown of hazardous chemicals. Conclusion Our findings provide further evidence that pecan PSMs influence the structure and function of the gut microbiota, which in turn affects the population stability of ZC. The study's findings can serve as a theoretical foundation for further work on selecting ZC-resistant cultivars and developing green management technology for ZC.
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Affiliation(s)
- Jie Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Shouke Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
| | - Junqia Kong
- College of Landscape Architecture, Zhejiang A&F University, Hangzhou, China
| | - Jun Chang
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
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Zhao Y, Wang H, Xu Y, Wang K, Huang C, Deng Y, Huang J, Li Y. Characteristic analysis of BZR genes family and their responses to hormone treatments and abiotic stresses in Carya illinoinensis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 341:111990. [PMID: 38253206 DOI: 10.1016/j.plantsci.2024.111990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 12/04/2023] [Accepted: 01/12/2024] [Indexed: 01/24/2024]
Abstract
As the core of Brassinosteroids (BR) signaling pathway, BR-resistant (BZR) transcription factor regulates thousands of targeted genes mediating photomophogenesis, pollen sterility, cell expansion and stress response. Pecan (Carya illinoinensis) is a famous trees species of Carya, and its nut has high nutritional and economic values. However, there has no report on BZR genes family in pecan yet. Herein, totals of seven CiBZR members were identified in pecan genome, which were predicted to be hydrophilic unstable proteins and located in the nucleus. CiBZR genes had close evolutionary relationships with CcBZRs and JrBZRs in both Carya cathayensis and Juglans regia. These seven CiBZR genes were located independently on 7 chromosomes without doubling or tandem duplication. Based on the analysis of conserved motifs and gene structures, CiBZR genes were divided into three categories. More than 40 cis-acting elements were found in the 2 kb promoter regions of CiBZRs, which were mainly involved in hormone, light, and stress response, and plant growth and development. Notably, some of these CiBZR proteins were mainly located in the nucleus, had the self-activation ability and interaction relationship with BIN2 kinase, and negatively regulated the expression of CiCPD and CiDWF4. Gene expressions analysis further showed that CiBZR genes could express in many tissues and shared similar expression trends during embryo development. Moreover, most CiBZR genes responded to BR, Gibberellin (GA), Strigolactone (SL), salt, acid and osmotic stress. This study provides theoretical basis for the subsequent study on the role of CiBZR family genes in plant growth, development and stress responses.
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Affiliation(s)
- Yirui Zhao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Haoyu Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Yifan Xu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Ketao Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Chunying Huang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | | | - Jianqin Huang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
| | - Yan Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
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Liu H, Zhou H, Ye H, Gen F, Lei M, Li J, Wei W, Liu Z, Hou N, Zhao P. Integrated metabolomic and transcriptomic dynamic profiles of endopleura coloration during fruit maturation in three walnut cultivars. BMC PLANT BIOLOGY 2024; 24:109. [PMID: 38350847 PMCID: PMC10865529 DOI: 10.1186/s12870-024-04790-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/01/2024] [Indexed: 02/15/2024]
Abstract
BACKGROUND The color of endopleura is a vital factor in determining the economic value and aesthetics appeal of nut. Walnuts (Juglans) are a key source of edible nuts, high in proteins, amino acids, lipids, carbohydrates. Walnut had a variety endopleura color as yellow, red, and purple. However, the regulation of walnut endopleura color remains little known. RESULTS To understand the process of coloration in endopleura, we performed the integrative analysis of transcriptomes and metabolomes at two developmental stages of walnut endopleura. We obtained total of 4,950 differentially expressed genes (DEGs) and 794 metabolites from walnut endopleura, which are involved in flavonoid and phenolic biosynthesis pathways. The enrichment analysis revealed that the cinnamic acid, coniferyl alcohol, naringenin, and naringenin-7-O-glucoside were important metabolites in the development process of walnut endopleura. Transcriptome and metabolome analyses revealed that the DEGs and differentially regulated metabolites (DRMs) were significantly enriched in flavonoid biosynthesis and phenolic metabolic pathways. Through co-expression analysis, CHS (chalcone synthase), CHI (chalcone isomerase), CCR (cinnamoyl CoA reductase), CAD (cinnamyl alcohol dehydrogenase), COMT (catechol-Omethyl transferase), and 4CL (4-coumaroyl: CoA-ligase) may be the key genes that potentially regulate walnut endopleura color in flavonoid biosynthesis and phenolic metabolic pathways. CONCLUSIONS This study illuminates the metabolic pathways and candidate genes that underlie the endopleura coloration in walnuts, lay the foundation for further study and provides insights into controlling nut's colour.
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Affiliation(s)
- Hengzhao Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China
| | - Huijuan Zhou
- Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, Shaanxi, China
| | - Hang Ye
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China
| | - Fangdong Gen
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China
| | - Mengfan Lei
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China
| | - Jinhan Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China
| | - Wenjun Wei
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China
| | - Zhanlin Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China
| | - Na Hou
- Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Academy of Forestry, Guiyang, 55005, China.
| | - Peng Zhao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China.
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Liu H, Lan Y, Wang L, Jiang N, Zhang X, Wu M, Xiang Y. CiAP2/ERF65 and CiAP2/ERF106, a pair of homologous genes in pecan (Carya illinoensis), regulate plant responses during submergence in transgenic Arabidopsis thaliana. JOURNAL OF PLANT PHYSIOLOGY 2024; 293:154166. [PMID: 38163387 DOI: 10.1016/j.jplph.2023.154166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/03/2024]
Abstract
When plants are entirely submerged, photosynthesis and respiration are severely restricted, affecting plant growth and potentially even causing plant death. The AP2/ERF superfamily has been widely reported to play a vital role in plant growth, development and resistance to biotic and abiotic stresses. However, no relevant studies exist on flooding stress in pecan. In this investigation, we observed that CiAP2/ERF65 positively modulated the hypoxia response during submergence, whereas CiAP2/ERF106 was sensitive to submergence. The levels of physiological and biochemical indicators, such as POD, CAT and among others, in CiAP2/ERF65-OE lines were significantly higher than those in wild-type Arabidopsis thaliana, indicating that the antioxidant capacity of CiAP2/ERF65-OE lines was enhanced under submergence. The RNA-seq results revealed that the maintenance of the expression levels of the antenna protein gene, different signaling pathways for regulation, as well as the storage and consumption of ATP, might account for the opposite phenotypes of CiAP2/ERF65 and CiAP2/ERF106. Furthermore, the expression of some stress-related genes was altered during submergence and reoxygenation. Overall, these findings enhance our understanding of submergence stress in pecan, providing important candidate genes for the molecular design and breeding of hypoxia resistant in plants.
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Affiliation(s)
- Hongxia Liu
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
| | - Yangang Lan
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
| | - Linna Wang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
| | - Nianqin Jiang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
| | - Xiaoyue Zhang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
| | - Min Wu
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
| | - Yan Xiang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.
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Liu Y, Liu J, Tang C, Uyanga VA, Xu L, Zhang F, Sun J, Chen Y. Flavonoids‑targeted metabolomic analysis following rice yellowing. Food Chem 2024; 430:136984. [PMID: 37557031 DOI: 10.1016/j.foodchem.2023.136984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 07/18/2023] [Accepted: 07/22/2023] [Indexed: 08/11/2023]
Abstract
Flavonoids are the main metabolites responsible for yellowing of rice. However, the accumulation pattern of flavonoids and the metabolic basis of flavonoid biosynthesis during rice yellowing remain unclear. Thus, flavonoid-targeted metabolomics was used to investigate the composition and concentration of flavonoids in rice during yellowing. The results indicated the differential flavonoids at Month 3 and Month 5 of storage were more in composition and concentration with higher antioxidant capacity. Accumulated flavonoids were mainly flavones, flavonols, isoflavones, and anthocyanidins, of which rutin, farrerol, naringenin, cyanidin 3-rutinoside, and diosmetin were the indicators of rice yellowing. Metabolic association among flavonoids demonstrated the formation of yellow pigments was jointly induced by flavones, flavonols, isoflavones, and anthocyanidins metabolism. Examination of flavonoid metabolism presented in this study enhanced current understanding of the relationship between flavonoid metabolites and development of rice yellowing. It also offers a theoretical basis for targeted prediction of rice yellowing in the future.
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Affiliation(s)
- Yuqian Liu
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
| | - Jinguang Liu
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Caiyun Tang
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Victoria Anthony Uyanga
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China
| | - Longhua Xu
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Fengjiao Zhang
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Jingyu Sun
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Yilun Chen
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China
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Zeng H, Li Y, Chen W, Yan J, Wu J, Lou H. Melatonin alleviates aluminum toxicity by regulating aluminum-responsive and nonresponsive pathways in hickory. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132274. [PMID: 37643573 DOI: 10.1016/j.jhazmat.2023.132274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/18/2023] [Accepted: 08/10/2023] [Indexed: 08/31/2023]
Abstract
Aluminum (Al) toxicity is a significant constraint on agricultural productivity worldwide. Melatonin (MT) has been shown to alleviate Al toxicity in plants; however, the underlying mechanisms remain largely unknown. Here, we employed a combination of physiological and molecular biology techniques to examine the role of MT in mitigating Al toxicity of hickory. We found that MT decreased the contents of cell wall pectin, hemicellulose, Al, and Al-induced massive reactive oxygen species accumulation in the roots of hickory. Transcriptomic analysis revealed that MT may alleviate root tip Al stress by regulating Al-responsive and nonresponsive pathways. Co-expression regulatory network and dual-luciferase receptor assays revealed that transcription factors, CcC3H12 and CcAZF2, responded to MT and significantly activated the expression of two cell wall pectin-related genes, CcPME61 and CcGAE6, respectively. Further, yeast one-hybrid and electrophoretic mobility shift assay (EMSA) assays verified that CcC3H12 and CcAZF2 regulated CcPME61 and CcGAE6, respectively, by directly binding to their promoters. Overexpression of CcPME61 enhanced the Al sensitivity of Arabidopsis thaliana. Our results indicate that MT can improve Al tolerance of hickory via multiple pathways, which provides a new perspective for the study of the mechanism of MT in alleviating abiotic stress.
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Affiliation(s)
- Hao Zeng
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Yaru Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Weijie Chen
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Jingwei Yan
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China.
| | - Jiasheng Wu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China.
| | - Heqiang Lou
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China.
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10
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Si X, Lyu S, Hussain Q, Ye H, Huang C, Li Y, Huang J, Chen J, Wang K. Analysis of Delta(9) fatty acid desaturase gene family and their role in oleic acid accumulation in Carya cathayensis kernel. FRONTIERS IN PLANT SCIENCE 2023; 14:1193063. [PMID: 37771493 PMCID: PMC10523321 DOI: 10.3389/fpls.2023.1193063] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 08/14/2023] [Indexed: 09/30/2023]
Abstract
Carya cathayensis, commonly referred to as Chinese hickory, produces nuts that contain high-quality edible oils, particularly oleic acid (18:1). It is known that stearoyl-ACP desaturase (SAD) is the first key step converting stearic acid (C18:0, SA) to oleic acid (C18:1, OA) in the aminolevulinic acid (ALA) biosynthetic pathway and play an important role in OA accumulation. Thus far, there is little information about SAD gene family in C. cathayensis and the role of individual members in OA accumulation. This study searched the Chinese Hickory Genome Database and identified five members of SAD genes, designated as CcSADs, at the whole genome level through the comparison with the homologous genes from Arabidopsis. RNA-Seq analysis showed that CcSSI2-1, CcSSI2-2, and CcSAD6 were highly expressed in kernels. The expression pattern of CcSADs was significantly correlated with fatty acid accumulation during the kernel development. In addition, five full-length cDNAs encoding SADs were isolated from the developing kernel of C. cathayensis. CcSADs-green fluorescent protein (GFP) fusion construct was infiltrated into tobacco epidermal cells, and results indicated their chloroplast localization. The catalytic function of these CcSADs was further analyzed by heterologous expression in Saccharomyces cerevisiae, Nicotiana benthamiana, and walnut. Functional analysis demonstrated that all CcSADs had fatty acid desaturase activity to catalyze oleic acid biosynthesis. Some members of CcSADs also have strong substrate specificity for 16:0-ACP to synthesize palmitoleic acid (C16:1, PA). Our study documented SAD gene family in C. cathayensis and the role of CcSSI2-1, CcSSI2-2, and CcSAD6 in OA accumulation, which could be important for future improvement of OA content in this species via genetic manipulation.
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Affiliation(s)
- Xiaolin Si
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, Zhejiang, China
| | - Shiheng Lyu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, Zhejiang, China
| | - Quaid Hussain
- College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
| | - Hongyu Ye
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, Zhejiang, China
| | - Chunying Huang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, Zhejiang, China
| | - Yan Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, Zhejiang, China
| | - Jianqin Huang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, Zhejiang, China
| | - Jianjun Chen
- Mid-Florida Research and Education Center, Environmental Horticulture Department, Institute of Food and Agricultural Sciences, University of Florida, Apopka, FL, United States
| | - Ketao Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an, Zhejiang, China
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11
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Tang P, Wang JQ, Wang YF, Jin JC, Meng X, Zhu Y, Gao Y, Xu YQ. Comparison analysis of full-spectrum metabolomics revealed on the variation of potential metabolites of unscented, Chloranthus spicatus scented, and Osmanthus fragrans (Thunb.) Lour. scented Congou black teas. Front Nutr 2023; 10:1234807. [PMID: 37645629 PMCID: PMC10461629 DOI: 10.3389/fnut.2023.1234807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/18/2023] [Indexed: 08/31/2023] Open
Abstract
Introduction In recent years, scented black tea has attracted much attention due to its pleasant floral aroma and mellow flavor, but little research has been carried out on its flavor metabolic profile. Methods In this study, the flavor metabolic profiles of unscented, Chloranthus spicatus scented, and Osmanthus fragrans (Thunb.) Lour. scented Congou black teas were investigated using full-spectrum metabolomics analysis method, the first time that the flavor profiles of scented black tea were characterized in detail. Results and Discussion The results revealed that a total of 3,128 metabolites were detected in the three teas. Based on the criteria of variable importance in the project >1 and fold change ≥2 or ≤ 0.5, 761 non-volatile metabolites and 509 volatile metabolites were filtered as differential metabolites. Many differential non-volatile metabolites belonged to flavonoids, phenolic acids, and terpenoids. Floral, fruity and herbaceous volatile metabolites were significantly up-regulated in Chloranthus spicatus scented Congou black tea while sweet and fruity volatile metabolites were significantly down-regulated in Osmanthus fragrans (Thunb.) Lour. scented Congou black tea. The results contribute to a better understanding of the scenting techniques on the flavor quality of scented black teas and provide some information on the flavor chemistry theory of scented black teas.
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Affiliation(s)
- Ping Tang
- Hangzhou Vocational & Technical College, Hangzhou, China
| | - Jie-Qiong Wang
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Tea Research Institute Chinese Academy of Agricultural Sciences, Hangzhou, China
- College of Food Science, Southwest University, Chongqing, China
| | - Yong-Feng Wang
- Jingdezhen Jin Gui Yuan Agricultural Development Co Ltd, Jingdezhen, China
| | - Jian-Chang Jin
- College of Biological and Environmental Engneering, Zhejiang Shuren University, Hangzhou, China
| | - Xin Meng
- College of Food and Health, Zhejiang A&F University, Hangzhou, China
| | - Yan Zhu
- College of Food and Health, Zhejiang A&F University, Hangzhou, China
| | - Ying Gao
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Tea Research Institute Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Yong-Quan Xu
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Tea Research Institute Chinese Academy of Agricultural Sciences, Hangzhou, China
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12
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Sun S, Li K, Du H, Luo J, Jiang Y, Wang J, Liu M, Liu G, Han S, Che H. Integrating Widely Targeted Lipidomics and Transcriptomics Unravels Aberrant Lipid Metabolism and Identifies Potential Biomarkers of Food Allergies in Rats. Mol Nutr Food Res 2023; 67:e2200365. [PMID: 37057506 DOI: 10.1002/mnfr.202200365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 01/17/2023] [Indexed: 04/15/2023]
Abstract
SCOPE Oral food challenges (OFCs) are currently the gold standard for determining the clinical reactivity of food allergy (FA) but are time-consuming, expensive, and risky. To screen novel peripheral biomarkers of FA and characterize the aberrant lipid metabolism in serum, 24 rats are divided into four groups: peanut, milk, and shrimp allergy (PA, MA, and SA, respectively) and control groups, with six rats in each group, and used for widely targeted lipidomics and transcriptomics analysis. METHODS AND RESULTS Widely targeted lipidomics reveal 144, 162, and 206 differentially accumulated lipids in PA, MA, and SA groups, respectively. The study integrates widely targeted lipidomics and transcriptomics and identifies abnormal lipid metabolism correlated with widespread differential accumulation of diverse lipids (including triacylglycerol, diacylglycerol, sphingolipid, and glycerophospholipid) in PA, MA, and SA. Simplified random forest classifier is constructed through five repetitions of 10-fold cross-validation to distinguish allergy from control. A subset of 15 lipids as potential biomarkers allows for more reliable and more accurate prediction of FA. Independent replication validates the reproducibility of potential biomarkers. CONCLUSION The results reveal the major abnormalities in lipid metabolism and suggest the potential role of lipids as novel molecular signatures for FA.
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Affiliation(s)
- Shanfeng Sun
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Kexin Li
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Hang Du
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Jiangzuo Luo
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Yuchi Jiang
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Junjuan Wang
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Manman Liu
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Guirong Liu
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Shiwen Han
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Huilian Che
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, The 2115 Talent Development Program of China Agricultural University College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
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13
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Yang Z, Qin T, Jin H, Wang J, Li C, Lim KJ, Wang Z. Quantitative Phosphoproteomic Analysis Reveals Potential Regulatory Mechanisms of Early Fruit Enlargement in Pecan ( Carya illinoinensis). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4901-4914. [PMID: 36938622 DOI: 10.1021/acs.jafc.2c08876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Pecan (Carya illinoinensis) is a popular tree nut. Its fruit development undergoes slow growth, rapid expansion, core hardening, and kernel maturation stages. However, little is known about how pecan initiates fruit development and enlargement after pollination. In this study, we performed the first large-scale identification of potential phosphorylation sites and proteins at early development of pecan fruit by a label-free phosphoproteomic quantification technique. A total of 2155 phosphosites were identified from 1953 phosphopeptides covering 1311 phosphoproteins in unpollinated pistils and fruits at 5 and 9 weeks after pollination. Of these, 699 nonredundant phosphoproteins were differentially phosphorylated (DP). Furthermore, the phosphorylation intensity of DP proteins in brassinolide (BR) and auxin signaling were analyzed, and the function of CiBZR1 was investigated. Ectopic expression of CiBZR1 resulted in BR response phenotypes with curled leaves and fruit, while enlarged seed size in Arabidopsis. Subcellular localization and transcriptional activation activity assay demonstrated that CiBZR1 distributed in both the nucleus and cytoplasm with transcriptional activity. When two phosphosites mutated, CiBZR1S201P,S205G moved to the nucleus completely, while the transcriptional activity remained unchanged. Taken together, our data reveal extensive phosphoproteins and lay a foundation to comprehensively dissect the potential post-translational regulation mechanism of early development of pecan fruit.
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Affiliation(s)
- Zhengfu Yang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an District, 311300 Hangzhou, Zhejiang, China
| | - Tao Qin
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an District, 311300 Hangzhou, Zhejiang, China
| | - Hongmiao Jin
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an District, 311300 Hangzhou, Zhejiang, China
| | - Jiani Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an District, 311300 Hangzhou, Zhejiang, China
| | - Caiyun Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an District, 311300 Hangzhou, Zhejiang, China
| | - Kean-Jin Lim
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an District, 311300 Hangzhou, Zhejiang, China
| | - Zhengjia Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an District, 311300 Hangzhou, Zhejiang, China
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14
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Zhao Y, Hou Z, Zhang N, Ji H, Dong C, Yu J, Chen X, Chen C, Guo H. Application of proteomics to determine the mechanism of ozone on sweet cherries ( Prunus avium L.) by time-series analysis. FRONTIERS IN PLANT SCIENCE 2023; 14:1065465. [PMID: 36844069 PMCID: PMC9948404 DOI: 10.3389/fpls.2023.1065465] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 01/05/2023] [Indexed: 06/18/2023]
Abstract
This research investigated the mechanism of ozone treatment on sweet cherry (Prunus avium L.) by Lable-free quantification proteomics and physiological traits. The results showed that 4557 master proteins were identified in all the samples, and 3149 proteins were common to all groups. Mfuzz analyses revealed 3149 candidate proteins. KEGG annotation and enrichment analysis showed proteins related to carbohydrate and energy metabolism, protein, amino acids, and nucleotide sugar biosynthesis and degradation, and fruit parameters were characterized and quantified. The conclusions were supported by the fact that the qRT-PCR results agreed with the proteomics results. For the first time, this study reveals the mechanism of cherry in response to ozone treatment at a proteome level.
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Affiliation(s)
- Yuehan Zhao
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
- Institute of Agricultural Products Preservation and Processing Technology (National Engineering Technology Research Center for Preservation of Agriculture Product), Tianjin Academy of Agricultural Sciences, Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Ministry of Agriculture of the People’s Republic of China, Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin, China
| | - Zhaohua Hou
- College of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Ji’nan, China
| | - Na Zhang
- Institute of Agricultural Products Preservation and Processing Technology (National Engineering Technology Research Center for Preservation of Agriculture Product), Tianjin Academy of Agricultural Sciences, Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Ministry of Agriculture of the People’s Republic of China, Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin, China
| | - Haipeng Ji
- Institute of Agricultural Products Preservation and Processing Technology (National Engineering Technology Research Center for Preservation of Agriculture Product), Tianjin Academy of Agricultural Sciences, Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Ministry of Agriculture of the People’s Republic of China, Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin, China
- Key Laboratory of Cold Chain Logistics Technology for Agro-product, Ministry of Agriculture and Rural Affairs, Ministry of Agriculture and Rural Affairs, Institute of Agro-Products Processing and Nuclear agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Chenghu Dong
- Institute of Agricultural Products Preservation and Processing Technology (National Engineering Technology Research Center for Preservation of Agriculture Product), Tianjin Academy of Agricultural Sciences, Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Ministry of Agriculture of the People’s Republic of China, Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin, China
| | - Jinze Yu
- Institute of Agricultural Products Preservation and Processing Technology (National Engineering Technology Research Center for Preservation of Agriculture Product), Tianjin Academy of Agricultural Sciences, Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Ministry of Agriculture of the People’s Republic of China, Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin, China
| | - Xueling Chen
- Key Laboratory of Cold Chain Logistics Technology for Agro-product, Ministry of Agriculture and Rural Affairs, Ministry of Agriculture and Rural Affairs, Institute of Agro-Products Processing and Nuclear agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Cunkun Chen
- Institute of Agricultural Products Preservation and Processing Technology (National Engineering Technology Research Center for Preservation of Agriculture Product), Tianjin Academy of Agricultural Sciences, Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Ministry of Agriculture of the People’s Republic of China, Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin, China
| | - Honglian Guo
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
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15
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Zhang C, Ren H, Yao X, Wang K, Chang J, Shao W. Metabolomics and Transcriptomics Analyses Reveal Regulatory Networks Associated with Fatty Acid Accumulation in Pecan Kernels. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:16010-16020. [PMID: 36472227 DOI: 10.1021/acs.jafc.2c06947] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Pecans are a globally important tree nut crop. Pecan nuts are rich in fatty acids (FAs), proteins, and flavonoids in addition to thiamine and numerous micronutrients. Although several of these nutriments have been studied in this plant, the comprehensive metabolite variations and molecular mechanisms associated with them have not been fully elucidated. In this study, untargeted metabolomics and transcriptomics were integrated to reveal the metabolite accumulation patterns and their associated molecular mechanisms during pecan kernel development. In total, 4260 (under positive mode) and 2726 (under negative mode) high quality features were retained. Overall, 163 differentially accumulated metabolites were identified. Most components were classified into the categories "organic acids and derivatives" and "lipids and lipid-like molecules." The accumulation patterns of amino acids, FAs, carbohydrates, organic acids, vitamins, flavonoids, and phenylpropanoids alongside embryo development were determined. Furthermore, transcriptomes from four pecan kernel developmental stages were used to assess transcript expression levels. Coexpression analyses were performed between FAs and their related genes. This study provides a comprehensive overview of the metabolic changes and regulations during pecan kernel development. We believe that the identification of nutriment accumulation trends and hub genes associated with the biosynthesis of the components will be valuable for genetically improving this plant.
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Affiliation(s)
- Chengcai Zhang
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang District, Hangzhou, Zhejiang Province 311400, China
| | - Huadong Ren
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang District, Hangzhou, Zhejiang Province 311400, China
| | - Xiaohua Yao
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang District, Hangzhou, Zhejiang Province 311400, China
| | - Kailiang Wang
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang District, Hangzhou, Zhejiang Province 311400, China
| | - Jun Chang
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang District, Hangzhou, Zhejiang Province 311400, China
| | - Weizhong Shao
- Forestry Bureau of Jiande, Jiande, Zhejiang Province 311600, China
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16
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CcMYB12 Positively Regulates Flavonoid Accumulation during Fruit Development in Carya cathayensis and Has a Role in Abiotic Stress Responses. Int J Mol Sci 2022; 23:ijms232415618. [PMID: 36555261 PMCID: PMC9779359 DOI: 10.3390/ijms232415618] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/28/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022] Open
Abstract
Flavonoid, an important secondary metabolite in plants, is involved in many biological processes. Its synthesis originates from the phenylpropane metabolic pathway, and it is catalyzed by a series of enzymes. The flavonoid biosynthetic pathway is regulated by many transcription factors, among which MYB transcription factors are thought to be key regulators. Hickory (Carya cathayensis) is an economic forest tree species belonging to the Juglandaceae family, and its fruit is rich in flavonoids. The transcriptome of exocarp and seed of hickory has previously been sequenced and analyzed by our team, revealing that CcMYB12 (CCA0691S0036) may be an important regulator of flavonoid synthesis. However, the specific regulatory role of CcMYB12 in hickory has not been clarified. Through a genome-wide analysis, a total of 153 R2R3-MYB genes were identified in hickory, classified into 23 subclasses, of which CcMYB12 was located in Subclass 7. The R2R3-MYBs showed a differential expression with the development of hickory exocarp and seed, indicating that these genes may regulate fruit development and metabolite accumulation. The phylogenetic analysis showed that CcMYB12 is a flavonol regulator, and its expression trend is the same as or opposite to that of flavonol synthesis-related genes. Moreover, CcMYB12 was found to be localized in the nucleus and have self-activation ability. The dual-luciferase reporter assay demonstrated that CcMYB12 strongly bonded to and activated the promoters of CcC4H, CcCHS, CcCHI, and CcF3H, which are key genes of the flavonoid synthesis pathway. Overexpression of CcMYB12 in Arabidopsis thaliana could increase the content of total flavonoids and the expression of related genes, including PAL, C4H, CHS, F3H, F3’H, ANS, and DFR, in the flavonoid synthesis pathway. These results reveal that CcMYB12 may directly regulate the expression of flavonoid-related genes and promote flavonoid synthesis in hickory fruit. Notably, the expression level of CcMYB12 in hickory seedlings was significantly boosted under NaCl and PEG treatments, while it was significantly downregulated under acid stress, suggesting that CcMYB12 may participate in the response to abiotic stresses. The results could provide a basis for further elucidating the regulation network of flavonoid biosynthesis and lay a foundation for developing new varieties of hickory with high flavonoid content.
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17
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Liu C, Liu M, Yang L, Zhang X. Influence of ripening stage and meteorological parameters on the accumulation pattern of polyphenols in greengages ( Prunus mume Sieb. Et Zucc) by widely targeted metabolomic. Curr Res Food Sci 2022; 5:1837-1844. [PMID: 36276245 PMCID: PMC9579437 DOI: 10.1016/j.crfs.2022.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/19/2022] [Accepted: 10/10/2022] [Indexed: 11/05/2022] Open
Abstract
Greengage is a Chinese traditional medicine food homology plant that contains abundant polyphenols. Greengages with different levels of maturity have different medicinal functions and applications. Therefore, this study comprehensively analysed the phenolic compounds in greengage of whole mature stage. Notably, the influence of climate conditions on greengage polyphenol synthesis was deeply explored. The polyphenols of greengages were profiled based on the widely targeted metabolomic technology using ultra-performance liquid chromatography-electrospray ionisation triple quadrupole mass spectrometry (UPLC-QTRAP-MS/MS). A total of 214 polyphenols were detected, covering 11 subclasses. During the ripening of greengages, these polyphenols first increased and then decreased, peaking during the swell stage. Multivariate statistical methods, including redundancy analysis (RDA), random forest analysis, Mantel test, and Spearman's correlation indicated that temperature, sunshine hours, humidity, and radiation were important factors driving the formation and changes in the polyphenols of greengages. In particular, flavanones and flavonols, showed a structure-dependent response to temperature and radiation.
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Affiliation(s)
- Chang Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Minxin Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Lili Yang
- Department of Horticulture, Beijing Changping Vocational School, Beijing, 102206, China
| | - Xiaoxu Zhang
- Department of Nutrition and Health, China Agricultural University, Beijing, 100193, China,Corresponding author.
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18
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Yang J, Li Y, Li S, Zhang Y, Feng R, Huang R, Chen M, Qian Y. Metabolic signatures in human follicular fluid identify lysophosphatidylcholine as a predictor of follicular development. Commun Biol 2022; 5:763. [PMID: 35906399 PMCID: PMC9334733 DOI: 10.1038/s42003-022-03710-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 07/12/2022] [Indexed: 12/07/2022] Open
Abstract
In order to investigate the metabolic characteristics of human follicular fluid (FF) and to reveal potential metabolic predictors of follicular development (FD) with clinical implications, we analyzed a total of 452 samples based on a two-stage study design. In the first stage, FF samples from both large follicles (LFs) and matched-small follicles (SFs) of 26 participants were analyzed with wide-spectrum targeted metabolomics. The metabolic signatures were described by multi-omics integration technology including metabolomic data and transcriptomic data. In the second stage, the potential biomarkers of FD were verified using enzyme-linked immunoassay with FF and blood serum from an independent 200 participants. We describe the FF metabolic signatures from ovarian follicles of different developmental stages. Lysophosphatidylcholine (LPC) can be used as a biomarker of FD and ovarian sensitivity, advancing the knowledge of metabolic regulation during FD and offering potential detection and therapeutic targets for follicle and oocyte health improvements in humans. A two-stage metabolomic analysis for human follicular fluid characteristics and predictors of follicular development yields metabolic signatures and proposes lysophosphatidylcholine (LPC) as a biomarker for follicular development.
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Affiliation(s)
- Jihong Yang
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, China
| | - Yangbai Li
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, China
| | - Suying Li
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, China
| | - Yan Zhang
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, China
| | - Ruizhi Feng
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, 211166, China.,The Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, China
| | - Rui Huang
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Minjian Chen
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, China. .,State Key Laboratory of Reproductive Medicine, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China.
| | - Yun Qian
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, China.
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Sun S, Luo J, Du H, Liu G, Liu M, Wang J, Han S, Che H. Widely Targeted Lipidomics and Transcriptomics Analysis Revealed Changes of Lipid Metabolism in Spleen Dendritic Cells in Shrimp Allergy. Foods 2022; 11:foods11131882. [PMID: 35804699 PMCID: PMC9265612 DOI: 10.3390/foods11131882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 06/09/2022] [Accepted: 06/23/2022] [Indexed: 02/01/2023] Open
Abstract
Shrimp allergy (SA) is pathological type 2 inflammatory immune responses against harmless shrimp protein allergen, which is caused by complex interactions between dendritic cells (DCs) and other immune cells. Lipid metabolism in different DCs states are significantly changed. However, the lipid metabolism of spleen DCs in SA remain ambiguous. In this study, we established a BALB/c mouse shrimp protein extract-induced allergy model to determine the lipid profile of spleen DCs in SA, and the molecular mechanism between lipid metabolism and immune inflammation was preliminarily studied. Spleen DCs were sorted by fluorescence-activated cell sorting, and then widely targeted lipidomics and transcriptomics analysis were performed. Principal component analysis presented the lipidome alterations in SA. The transcriptomic data showed that Prkcg was involved in lipid metabolism, immune system, and inflammatory signaling pathway. In the correlation analysis, the results suggested that Prkcg was positively correlated with triacylglycerol (Pearson correlation coefficient = 0.917, p = 0.01). The lipidomics and transcriptomics integrated pathway analysis indicated the activated metabolic conversion from triacylglycerol to 1,2-diacyl-sn-glycerol and the transmission of lipid metabolism to immune inflammation (from triacylglycerol and ceramide to Prkcg) in SA spleen DCs, and cellular experiments in vitro showed that glyceryl trioleate and C16 ceramide treatment induced immune function alteration in DCs.
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Affiliation(s)
| | | | | | | | | | | | | | - Huilian Che
- Correspondence: ; Tel.: +86-10-6273-7244; Fax: +86-10-6232-3465
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Li P, Xu Y, Wang K, Guo W, Gu Y, Lyu S, Huang J, Lin H, Huang C, Xu Z, Li Y. Genome-Wide Identification of TLP Gene Family and Their Roles in Carya cathayensis Sarg in Response to Botryosphaeria dothidea. FRONTIERS IN PLANT SCIENCE 2022; 13:849043. [PMID: 35432404 PMCID: PMC9010463 DOI: 10.3389/fpls.2022.849043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
Hickory (Carya cathayensis) is a critical tree species of the genus Carya from the Juglandaceae family that contains nutrient-rich nuts. Due to large-scale soil degradation, the pests and diseases of hickory are becoming more and more serious. Thaumatin-like proteins (TLPs) are vital proteins involved in the complex defense process of plant pathogens. In this study, 40 CcTLP genes were identified genome-widely and phylogenetically grouped into three subfamilies. The sequence of CcTLPs had a conservative pattern, such as eight stable disulfide bonds, REDDD, and G-X-[GF]-X-C-X-T-[GA]-D-C-X(1,2)-G-X-(2,3)-C structure. In total, 57 cis-elements related to stress-responsive, light-responsive, phytohormone-responsive, and plant-responsive were discovered. Under salicylate (SA), methyl jasmonate (MeJA), and ethephon (ETH) treatments, the expressions of CcTLP28, CcTLP29, CcTLP30, CcTLP31, CcTLP32, CcTLP33, CcTLP37, CcTLP38, and CcTLP39 had different patterns. This is an indication that most of the TLP genes were upregulated by SA and downregulated by MeJA. Notably, seven TLP genes were significantly upregulated under the Botryosphaeria dothidea inoculation, especially CcTLP31, with an over 20-fold change. Nine genes were shown by subcellular localization analysis to be located at the plasma membrane and cytoplasm. The knowledge of the disease-resistant function of the CcTLP family in hickory is promoted by these results. A foundation reference for the molecular breeding of this plant in the future is provided by our findings.
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Shahzad MN, Ahmad S, Tousif MI, Ahmad I, Rao H, Ahmad B, Basit A. Profiling of phytochemicals from aerial parts of Terminalia neotaliala using LC-ESI-MS2 and determination of antioxidant and enzyme inhibition activities. PLoS One 2022; 17:e0266094. [PMID: 35358239 PMCID: PMC8970405 DOI: 10.1371/journal.pone.0266094] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 03/14/2022] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Owing to extraordinary healing power, Terminalia species have been used in traditional medicine systems to treat various diseases. Many folklore uses of Terminalia neotaliala (Madagascar's almond) included treating arterial hypertension, diabetes, diarrhea, dysentery, colic, oral and digestive candidiasis, intestinal parasitic infections, inflammatory skin conditions, postpartum care, and mycotic infections but nevertheless scientifically explored for its medicinal and pharmacological importance. Therefore, the current study intended to prepare methanolic extract and its fractionation with hexane, chloroform, and butanol followed by evaluation of their polyphenolic content, biological activities, and LCMS analysis. The biological study included antioxidant activity and enzyme inhibition assay i.e., α-glucosidase and urease. The insight study of biologically active secondary metabolites of butanol fraction (BUAE) was performed through LCMS. METHODS The total phenolic content (TPC) and total flavonoid content (TFC) of hydroalcoholic and its fractions were estimated using the Folin-Ciocalteu and aluminum chloride method. The total tannin content (TTC) was determined using the Folin-Denis spectrophotometric method. Similarly, the antioxidant potential of HAAE, HEAE, CFAE, and BUAE was determined using four methods as DPPH (1,1-diphenyl-2-picrylhydrazyl), 2,2-azinobis(3-ethylbenothiazoline)-6-sulfonic acid, cupric reducing antioxidant capacity (CUPRAC), and ferric reducing antioxidant power (FRAP). The sample extracts were also evaluated against two clinically important enzymes i.e., α-glucosidase and urease. RESULTS The BUAE (butanol aerial fraction) showed the highest TPC (234.79 ± 0.12 mg.GAE.g-1 DE), TFC (320.75 ± 12.50 mg.QE.g-1 DE), and TTC (143.36 ± 4.32 mg.TA.Eq.g-1 DE). The BUAE also showed the highest scavenging potential determined by DPPH (642.65 ± 1.11 mg.TEq.g-1 DE) and ABTS (543.17 ± 1.11 mg.TEq.g-1 DE), and the metal-reducing capacity determined by CUPRAC (1510.41 ± 4.45 mg.TEq.g-1 DE) and FRAP (739.81 ± 19.32 mg.TEq.g-1 DE). The LCMS of BUAE identified 18 different biologically active phytoconstituents validating a rich source of hydrolyzable tannins including ellagitannins and gallitannins. CONCLUSION The present study concluded that T. neotaliala is a rich source of polyphenols capable of neutralizing the damage caused by free radical accumulation in the cells and tissues. The significant antioxidant results and identification of high molecular weight hydrolyzable tannins enlightened the medicinal importance of T. neotaliala.
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Affiliation(s)
- Muhammad Nadeem Shahzad
- Department of Pharmaceutical Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Saeed Ahmad
- Department of Pharmaceutical Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | | | - Imtiaz Ahmad
- Department of Pharmaceutical Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Huma Rao
- Department of Pharmaceutical Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Bilal Ahmad
- Department of Pharmaceutical Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Abdul Basit
- Department of Pharmaceutical Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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Xing Y, Wang K, Huang C, Huang J, Zhao Y, Si X, Li Y. Global Transcriptome Analysis Revealed the Molecular Regulation Mechanism of Pigment and Reactive Oxygen Species Metabolism During the Stigma Development of Carya cathayensis. FRONTIERS IN PLANT SCIENCE 2022; 13:881394. [PMID: 35615144 PMCID: PMC9125253 DOI: 10.3389/fpls.2022.881394] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/22/2022] [Indexed: 05/20/2023]
Abstract
Hickory (Carya cathayensis Sarg.) is a monoecious plant of the genus Carya of the Juglandaceae family. Its nuts contain a number of nutritional compounds and are deeply loved by consumers. Interestingly, it was observed that the color of hickory stigma changed obviously from blooming to mature. However, the molecular mechanism underlying color formation during stigma development and the biological significance of this phenomenon was mostly unknown. In this work, pigment content, reactive oxygen species (ROS) removal capacity, and transcriptome analysis of developing stigma of hickory at 4 differential sampling time points (S1, S2, S3, and S4) were performed to reveal the dynamic changes of related pigment, antioxidant capacity, and its internal molecular regulatory mechanism. It was found that total chlorophyll content was decreased slightly from S1 to S4, while total carotenoids content was increased from S1 to S3 but decreased gradually from S3 to S4. Total anthocyanin content continued to increase during the four periods of stigma development, reaching the highest level at the S4. Similarly, the antioxidant capacity of stigma was also gradually improved from S1 to S4. Furthermore, transcriptome analysis of developing hickory stigma identified 31,027 genes. Time-series analysis of gene expressions showed that these genes were divided into 12 clusters. Cluster 5 was enriched with some genes responsible for porphyrin and chlorophyll metabolism, carotenoid metabolism, and photosynthesis. Meanwhile, cluster 10 was enriched with genes related to flavonoid metabolism, including anthocyanin involved in ROS scavenging, and its related genes were mainly distributed in cluster 12. Based on the selected threshold values, a total of 10432 differentially expressed genes were screened out and enriched in the chlorophyll, carotenoid, anthocyanin, and ROS metabolism. The expression trends of these genes provided plausible explanations for the dynamic change of color and ROS level of hickory stigma with development. qRT-PCR analyses were basically consistent with the results of RNA-seq. The gene co-regulatory networks of pigment and ROS metabolism were further constructed and MYB113 (CCA0887S0030) and WRKY75 (CCA0573S0068) were predicted to be two core transcriptional regulators. These results provided in-depth evidence for revealing the molecular mechanism of color formation in hickory stigma and its biological significance.
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