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Ntelkis N, Goossens A, Šola K. Cell type-specific control and post-translational regulation of specialized metabolism: opening new avenues for plant metabolic engineering. CURRENT OPINION IN PLANT BIOLOGY 2024; 81:102575. [PMID: 38901289 DOI: 10.1016/j.pbi.2024.102575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/22/2024] [Accepted: 05/27/2024] [Indexed: 06/22/2024]
Abstract
Although plant metabolic engineering enables the sustainable production of valuable metabolites with many applications, we still lack a good understanding of many multi-layered regulatory networks that govern metabolic pathways at the metabolite, protein, transcriptional and cellular level. As transcriptional regulation is better understood and often reviewed, here we highlight recent advances in the cell type-specific and post-translational regulation of plant specialized metabolism. With the advent of single-cell technologies, we are now able to characterize metabolites and their transcriptional regulators at the cellular level, which can refine our searches for missing biosynthetic enzymes and cell type-specific regulators. Post-translational regulation through enzyme inhibition, protein phosphorylation and ubiquitination are clearly evident in specialized metabolism regulation, but not frequently studied or considered in metabolic engineering efforts. Finally, we contemplate how advances in cell type-specific and post-translational regulation can be applied in metabolic engineering efforts in planta, leading to optimization of plants as metabolite production vehicles.
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Affiliation(s)
- Nikolaos Ntelkis
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium
| | - Alain Goossens
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium; Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland, 7600, South Africa.
| | - Krešimir Šola
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium
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Su X, Zhang X, Bai C, Liu H, Cao X, Yao L. Asymmetric distribution of mineral nutrients aggravates uneven fruit pigmentation driven by sunlight exposure in litchi. PLANTA 2023; 258:96. [PMID: 37819558 DOI: 10.1007/s00425-023-04250-9] [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: 08/06/2023] [Accepted: 09/24/2023] [Indexed: 10/13/2023]
Abstract
MAIN CONCLUSION Sunlight boosts anthocyanin synthesis/accumulation in sunny pericarp of litchi fruit, directly leading to uneven pigmentation. Distribution discrepancy of mineral element aggravates uneven coloration by modulating synthesis/accumulation of anthocyanin and sugar. Uneven coloration, characterized by red pericarp on sunny side and green pericarp on shady side, impacts fruit quality of 'Feizixiao' (cv.) litchi. The mechanisms of this phenomenon were explored by investigating the distribution of chlorophyll, flavonoids, sugars, and mineral elements in both types of pericarp. Transcriptome analysis in pericarp was conducted as well. Sunny pericarp contained higher anthocyanins in an order of magnitude and higher fructose, glucose, co-pigments (flavanols, flavonols, ferulic acid), and mineral elements like Ca, Mg and Mn, along with lower N, P, K, S, Cu, Zn and B (P < 0.01), compared to shady pericarp. Sunlight regulated the expression of genes involved in synthesis/accumulation of flavonoids and sugars and genes functioning in nutrient uptake and transport, leading to asymmetric distribution of these substances. Anthocyanins conferred red color on sunny pericarp, sugars, Ca and Mg promoted synthesis/accumulation of anthocyanins, and co-pigments enhanced color display of anthocyanins. The insufficiencies of anthocyanins, sugars and co-pigments, and inhibition effect of excess K, S, N and P on synthesis/accumulation of anthocyanins and sugars, jointly contributed to green color of shady pericarp. These findings highlight the role of asymmetric distribution of substances, mineral elements in particular, on uneven pigmentation in litchi, and provide insights into coloration improvement via precise fertilization.
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Affiliation(s)
- Xuexia Su
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Xiaotong Zhang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Cuihua Bai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
- Guangdong Provincial Key Laboratory of Agricultural and Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
| | - Huilin Liu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Xiaoying Cao
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Lixian Yao
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
- Guangdong Provincial Key Laboratory of Agricultural and Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
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3
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Sun G, Liao J, Kurze E, Hoffmann TD, Steinchen W, McGraphery K, Habegger R, Marek L, Catici DAM, Ludwig C, Jing T, Hoffmann T, Song C, Schwab W. Apocarotenoids are allosteric effectors of a dimeric plant glycosyltransferase involved in defense and lignin formation. THE NEW PHYTOLOGIST 2023; 238:2080-2098. [PMID: 36908092 DOI: 10.1111/nph.18875] [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: 10/18/2022] [Accepted: 03/02/2023] [Indexed: 05/04/2023]
Abstract
Glycosyltransferases are nature's versatile tools to tailor the functionalities of proteins, carbohydrates, lipids, and small molecules by transferring sugars. Prominent substrates are hydroxycoumarins such as scopoletin, which serve as natural plant protection agents. Similarly, C13-apocarotenoids, which are oxidative degradation products of carotenoids/xanthophylls, protect plants by repelling pests and attracting pest predators. We show that C13-apocarotenoids interact with the plant glycosyltransferase NbUGT72AY1 and induce conformational changes in the enzyme catalytic center ultimately reducing its inherent UDP-α-d-glucose glucohydrolase activity and increasing its catalytic activity for productive hydroxycoumarin substrates. By contrast, C13-apocarotenoids show no effect on the catalytic activity toward monolignol lignin precursors, which are competitive substrates. In vivo studies in tobacco plants (Nicotiana benthamiana) confirmed increased glycosylation activity upon apocarotenoid supplementation. Thus, hydroxycoumarins and apocarotenoids represent specialized damage-associated molecular patterns, as they each provide precise information about the plant compartments damaged by pathogen attack. The molecular basis for the C13-apocarotenoid-mediated interplay of two plant protective mechanisms and their function as allosteric enhancers opens up potential applications of the natural products in agriculture and pharmaceutical industry.
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Affiliation(s)
- Guangxin Sun
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Jieren Liao
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Elisabeth Kurze
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Timothy D Hoffmann
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Wieland Steinchen
- Center for Synthetic Microbiology (SYNMIKRO) & Faculty of Chemistry, Philipps-University Marburg, Karl-von-Frisch-Straße 14, 35043, Marburg, Germany
| | - Kate McGraphery
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Ruth Habegger
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Ludwig Marek
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Dragana A M Catici
- Center for Protein Assemblies (CPA), Technical University of Munich, Ernst-Otto-Fischer-Str. 8, 85748, Garching, Germany
| | - Christina Ludwig
- Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), School of Life Sciences Weihenstephan, Technische Universität München, Gregor-Mendel-Str. 4, 85354, Freising, Germany
| | - Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Thomas Hoffmann
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Wilfried Schwab
- Biotechnology of Natural Products, School of Life Sciences Weihenstephan, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
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Liao J, Lederer V, Bardhi A, Zou Z, Hoffmann TD, Sun G, Song C, Hoffmann T, Schwab W. Acceptors and Effectors Alter Substrate Inhibition Kinetics of a Plant Glucosyltransferase NbUGT72AY1 and Its Mutants. Int J Mol Sci 2023; 24:ijms24119542. [PMID: 37298492 DOI: 10.3390/ijms24119542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/22/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
One of the main obstacles in biocatalysis is the substrate inhibition (SI) of enzymes that play important roles in biosynthesis and metabolic regulation in organisms. The promiscuous glycosyltransferase UGT72AY1 from Nicotiana benthamiana is strongly substrate-inhibited by hydroxycoumarins (inhibitory constant Ki < 20 µM), but only weakly inhibited when monolignols are glucosylated (Ki > 1000 µM). Apocarotenoid effectors reduce the inherent UDP-glucose glucohydrolase activity of the enzyme and attenuate the SI by scopoletin derivatives, which could also be achieved by mutations. Here, we studied the kinetic profiles of different phenols and used the substrate analog vanillin, which has shown atypical Michaelis-Menten kinetics in previous studies, to examine the effects of different ligands and mutations on the SI of NbUGT72AY1. Coumarins had no effect on enzymatic activity, whereas apocarotenoids and fatty acids strongly affected SI kinetics by increasing the inhibition constant Ki. Only the F87I mutant and a chimeric version of the enzyme showed weak SI with the substrate vanillin, but all mutants exhibited mild SI when sinapaldehyde was used as an acceptor. In contrast, stearic acid reduced the transferase activity of the mutants to varying degrees. The results not only confirm the multi-substrate functionality of NbUGT72AY1, but also reveal that the enzymatic activity of this protein can be fine-tuned by external metabolites such as apocarotenoids and fatty acids that affect SI. Since these signals are generated during plant cell destruction, NbUGT72AY1 likely plays an important role in plant defense by participating in the production of lignin in the cell wall and providing direct protection through the formation of toxic phytoalexins.
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Affiliation(s)
- Jieren Liao
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Veronika Lederer
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Alba Bardhi
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Zhiwei Zou
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Timothy D Hoffmann
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Guangxin Sun
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei 230036, China
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
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Liao J, Sun G, Kurze E, Steinchen W, Hoffmann TD, Song C, Zou Z, Hoffmann T, Schwab WG. Subfunctionalization of a monolignol to a phytoalexin glucosyltransferase is accompanied by substrate inhibition. PLANT COMMUNICATIONS 2023; 4:100506. [PMID: 36566353 DOI: 10.1016/j.xplc.2022.100506] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 11/16/2022] [Accepted: 12/16/2022] [Indexed: 05/11/2023]
Abstract
Uridine diphosphate-dependent glycosyltransferases (UGTs) mediate the glycosylation of plant metabolites, thereby altering their physicochemical properties and bioactivities. Plants possess numerous UGT genes, with the encoded enzymes often glycosylating multiple substrates and some exhibiting substrate inhibition kinetics, but the biological function and molecular basis of these phenomena are not fully understood. The promiscuous monolignol/phytoalexin glycosyltransferase NbUGT72AY1 exhibits substrate inhibition (Ki) at 4 μM scopoletin, whereas the highly homologous monolignol StUGT72AY2 is inhibited at 190 μM. We therefore used hydrogen/deuterium exchange mass spectrometry and structure-based mutational analyses of both proteins and introduced NbUGT72AY1 residues into StUGT72AY2 and vice versa to study promiscuity and substrate inhibition of UGTs. A single F87I and chimeric mutant of NbUGT72AY1 showed significantly reduced scopoletin substrate inhibition, whereas its monolignol glycosylation activity was almost unaffected. Reverse mutations in StUGT72AY2 resulted in increased scopoletin glycosylation, leading to enhanced promiscuity, which was accompanied by substrate inhibition. Studies of 3D structures identified open and closed UGT conformers, allowing visualization of the dynamics of conformational changes that occur during catalysis. Previously postulated substrate access tunnels likely serve as drainage channels. The results suggest a two-site model in which the second substrate molecule binds near the catalytic site and blocks product release. Mutational studies showed that minor changes in amino acid sequence can enhance the promiscuity of the enzyme and add new capabilities such as substrate inhibition without affecting existing functions. The proposed subfunctionalization mechanism of expanded promiscuity may play a role in enzyme evolution and highlights the importance of promiscuous enzymes in providing new functions.
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Affiliation(s)
- Jieren Liao
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Guangxin Sun
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Elisabeth Kurze
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Wieland Steinchen
- Center for Synthetic Microbiology (SYNMIKRO) & Faculty of Chemistry, Philipps-University Marburg, Karl-von-Frisch-Straße 14, 35043 Marburg, Germany
| | - Timothy D Hoffmann
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036 Hefei, Anhui, P. R. China
| | - Zhiwei Zou
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany
| | - Wilfried G Schwab
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354 Freising, Germany.
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6
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Cell Wall Integrity Signaling in Fruit Ripening. Int J Mol Sci 2023; 24:ijms24044054. [PMID: 36835462 PMCID: PMC9961072 DOI: 10.3390/ijms24044054] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/04/2023] [Accepted: 02/15/2023] [Indexed: 02/19/2023] Open
Abstract
Plant cell walls are essential structures for plant growth and development as well as plant adaptation to environmental stresses. Thus, plants have evolved signaling mechanisms to monitor the changes in the cell wall structure, triggering compensatory changes to sustain cell wall integrity (CWI). CWI signaling can be initiated in response to environmental and developmental signals. However, while environmental stress-associated CWI signaling has been extensively studied and reviewed, less attention has been paid to CWI signaling in relation to plant growth and development under normal conditions. Fleshy fruit development and ripening is a unique process in which dramatic alternations occur in cell wall architecture. Emerging evidence suggests that CWI signaling plays a pivotal role in fruit ripening. In this review, we summarize and discuss the CWI signaling in relation to fruit ripening, which will include cell wall fragment signaling, calcium signaling, and NO signaling, as well as Receptor-Like Protein Kinase (RLKs) signaling with an emphasis on the signaling of FERONIA and THESEUS, two members of RLKs that may act as potential CWI sensors in the modulation of hormonal signal origination and transduction in fruit development and ripening.
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7
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Li J, Zhao D, Akram MA, Guo C, Jin H, Hu W, Zhang Y, Wang X, Ma A, Xiong J, Ran J, Deng J. Effects of environmental factors on anthocyanin accumulation in the fruits of Lycium ruthenicum Murray across different desert grasslands. JOURNAL OF PLANT PHYSIOLOGY 2022; 279:153828. [PMID: 36252399 DOI: 10.1016/j.jplph.2022.153828] [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: 07/06/2022] [Revised: 09/22/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Anthocyanins can help plants adapt and resist adverse environments and have important nutritional and medicinal effects on human beings. However, how environmental factors affect the anthocyanins accumulation of plants and how to improve the anthocyanins content of plants in different soils needs further exploration. Hence, this study aimed to investigate the effects of environmental factors on the accumulation of cyanidin, petunidin, malvidin, and delphinidin in the fruits of Lycium ruthenicum in sandy desert grassland (SS), gravel desert grassland (GD), and saline-alkali desert grassland (SD) in the lower reaches of the Shiyang River Basin. The variable importance screened the key environmental factors affecting anthocyanin accumulation in projection (VIP) and multiple stepwise regressions. The structural equation model (SEM) was established to understand how the climate and soil factors affect the total anthocyanin accumulation. For establishing soil nutrient optimization schemes by partial least squares regression (PLS) and the simplex algorithm used to improve the anthocyanin content in different types of desert grassland. In SS, electrical conductivity (EC) and microbial biomass carbon (SMBC) showed highly significant and positive effects on the content of total anthocyanin, cyanidin, and petunidin. In GD, soil moisture and microbial biomass nitrogen (SNBN) significantly negatively affected total anthocyanin content. In SD, catalase (CAT), phosphatase (PHO), and total potassium (TK) had the greatest impact on total anthocyanin content. It is indicated that the targeted improvement measures are necessary to increase anthocyanin content in the fruit of Lycium ruthenicum.
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Affiliation(s)
- Jinhui Li
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China; Gansu Linze Desert Ecosystem Research Station, Gansu Desert Control Research Institute, Linze, 734200, China
| | - Dongmin Zhao
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China
| | - Muhammad Adnan Akram
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China; School of Economics, Lanzhou University, Lanzhou, 730000, China
| | - Chunxiu Guo
- Gansu Desert Control Research Institute, Lanzhou, 730070, China
| | - Hongxi Jin
- Gansu Linze Desert Ecosystem Research Station, Gansu Desert Control Research Institute, Linze, 734200, China; Gansu Desert Control Research Institute, Lanzhou, 730070, China
| | - Weigang Hu
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China
| | - Yahui Zhang
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China
| | - Xiaoting Wang
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China
| | - Aiai Ma
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China
| | - Junlan Xiong
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China
| | - Jinzhi Ran
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China.
| | - Jianming Deng
- State Key Laboratory of Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China
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Shi H, Zhou X, Qin M, Wang W, He X, Zhou W. Effect of CaCl 2 Sprays in Different Fruit Development Stages on Grape Berry Cracking. FRONTIERS IN PLANT SCIENCE 2022; 13:870959. [PMID: 35769303 PMCID: PMC9234641 DOI: 10.3389/fpls.2022.870959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
Grape cracking is a common phenomenon that can reach more than 50% in some varieties and can cause enormous economic losses. "Li Xiu" grapes in different developmental stages were treated with calcium chloride (5 g/L), and the cracking rate and related biochemical and genetic indices were measured in the fruit ripening stage. The results showed that calcium treatment during the flowering period could significantly reduce grape cracking. Based on the experimental results, there are several reasons as follows: first, calcium spraying during the flowering period was more favorable to calcium absorption in grapes, and the increased calcium content in the peels helped to improve the mechanical properties of the peels, thus increasing crack resistance; second, calcium treatment reduced the expression levels of genes related to glucose metabolism, which in turn reduced PG and cellulase activities, delaying the degradation of pectin and cellulose and resulting in more structural integrity of the peels; third, calcium treatment increased fruit hardness and reduced fruit ventral pressure by decreasing the expression levels of ABA-related genes and synthesis of endogenous abscisic acid (ABA), soluble sugars (SSs), and total soluble solids (TSSs).
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Affiliation(s)
- Hao Shi
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Xiangyu Zhou
- School of Food Science and Nutrition, University of Leeds, Leeds, United Kingdom
| | - Mengling Qin
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Wenlong Wang
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Xiaoe He
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Wenhua Zhou
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
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Fan D, Wang W, Hao Q, Jia W. Do Non-climacteric Fruits Share a Common Ripening Mechanism of Hormonal Regulation? FRONTIERS IN PLANT SCIENCE 2022; 13:923484. [PMID: 35755638 PMCID: PMC9218805 DOI: 10.3389/fpls.2022.923484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Fleshy fruits have been traditionally categorized into climacteric (CL) and non-climacteric (NC) groups. CL fruits share a common ripening mechanism of hormonal regulation, i.e., the ethylene regulation, whereas whether NC fruits share a common mechanism remains controversial. Abscisic acid (ABA) has been commonly thought to be a key regulator in NC fruit ripening; however, besides ABA, many other hormones have been increasingly suggested to play crucial roles in NC fruit ripening. NC fruits vary greatly in their organ origin, constitution, and structure. Development of different organs may be different in the pattern of hormonal regulation. It has been well demonstrated that the growth and development of strawberry, the model of NC fruits, is largely controlled by a hormonal communication between the achenes and receptacle; however, not all NC fruits contain achenes. Accordingly, it is particularly important to understand whether strawberry is indeed able to represent a universal mechanism for the hormonal regulation of NC fruit ripening. In this mini-review, we summarized the recent research advance on the hormone regulation of NC ripening in relation to fruit organ origination, constitution, and structure, whereby analyzing and discussing whether NC fruits may share a common mechanism of hormonal regulation.
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Affiliation(s)
- Dingyu Fan
- Institute of Horticulture Crops, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Wei Wang
- College of Horticulture, China Agricultural University, Beijing, China
| | - Qing Hao
- Institute of Horticulture Crops, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Wensuo Jia
- College of Horticulture, China Agricultural University, Beijing, China
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Glucosylation of (±)-Menthol by Uridine-Diphosphate-Sugar Dependent Glucosyltransferases from Plants. Molecules 2021; 26:molecules26185511. [PMID: 34576983 PMCID: PMC8470988 DOI: 10.3390/molecules26185511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/17/2022] Open
Abstract
Menthol is a cyclic monoterpene alcohol of the essential oils of plants of the genus Mentha, which is in demand by various industries due to its diverse sensorial and physiological properties. However, its poor water solubility and its toxic effect limit possible applications. Glycosylation offers a solution as the binding of a sugar residue to small molecules increases their water solubility and stability, renders aroma components odorless and modifies bioactivity. In order to identify plant enzymes that catalyze this reaction, a glycosyltransferase library containing 57 uridine diphosphate sugar-dependent enzymes (UGTs) was screened with (±)-menthol. The identity of the products was confirmed by mass spectrometry and nuclear magnetic resonance spectroscopy. Five enzymes were able to form (±)-menthyl-β-d-glucopyranoside in whole-cell biotransformations: UGT93Y1, UGT93Y2, UGT85K11, UGT72B27 and UGT73B24. In vitro enzyme activity assays revealed highest catalytic activity for UGT93Y1 (7.6 nkat/mg) from Camellia sinensis towards menthol and its isomeric forms. Although UGT93Y2 shares 70% sequence identity with UGT93Y1, it was less efficient. Of the five enzymes, UGT93Y1 stood out because of its high in vivo and in vitro biotransformation rate. The identification of novel menthol glycosyltransferases from the tea plant opens new perspectives for the biotechnological production of menthyl glucoside.
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Martins V, Unlubayir M, Teixeira A, Gerós H, Lanoue A. Calcium and methyl jasmonate cross-talk in the secondary metabolism of grape cells. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 165:228-238. [PMID: 34077875 DOI: 10.1016/j.plaphy.2021.05.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/23/2021] [Indexed: 05/29/2023]
Abstract
In grape cell cultures cv. Gamay Fréaux var. Teinturier, Ca was shown to decrease cell pigmentation through the inhibition of anthocyanin biosynthesis, while stimulating stilbenoids accumulation. Because methyl jasmonate (MeJA) is a well-known inducer of secondary metabolism in grape cells, and Ca antagonizes its stimulatory effect over several enzymes of core metabolic branches, in the present study we hypothesized that Ca and MeJA signaling pathways interact to regulate specific secondary metabolism routes. Grape cultured cells were elicited with MeJA or with MeJA + Ca and an UPLC-MS-based targeted metabolomic method was implemented to characterize their polyphenolic profiles. Results were compared with the profile of cells elicited with Ca only, previously reported. Data was complemented with gene expression analysis, allowing the assembly of a metabolic map that unraveled routes specifically regulated by both elicitors. MeJA + Ca specifically boosted E-resveratrol and E-ε-viniferin levels by 180% and 140%, respectively, in comparison to cells treated with MeJA only, while the stimulatory effect of MeJA over flavonoid synthesis was inhibited by Ca. In parallel, Ca downregulated most flavonoid pathway genes, including LAR1, ANS, BAN and ANR. Ca was able to mimic or potentiate the effect of MeJA on the expression of JA signaling genes, including JAR1, PIN and PR10. Transcript/metabolite correlation networks exposed the central influence of FLS1,STS,CDPK17 and COI1 in polyphenolic biosynthetic routes. This study highlights the potential of the MeJA-Ca combination for diverting polyphenolic metabolism towards the production of specific metabolites of interest, highly relevant in a biotechnological perspective.
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Affiliation(s)
- Viviana Martins
- Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro, 5001-801, Vila Real, Portugal.
| | - Marianne Unlubayir
- Université de Tours, EA 2106 «Biomolécules et Biotechnologie Végétales», UFR des Sciences Pharmaceutiques, 31 Av. Monge, F37200, Tours, France.
| | - António Teixeira
- Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
| | - Hernâni Gerós
- Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro, 5001-801, Vila Real, Portugal; Centre of Biological Engineering (CEB), Department of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
| | - Arnaud Lanoue
- Université de Tours, EA 2106 «Biomolécules et Biotechnologie Végétales», UFR des Sciences Pharmaceutiques, 31 Av. Monge, F37200, Tours, France.
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12
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Hu G, Yue X, Song J, Xing G, Chen J, Wang H, Su N, Cui J. Calcium Positively Mediates Blue Light-Induced Anthocyanin Accumulation in Hypocotyl of Soybean Sprouts. FRONTIERS IN PLANT SCIENCE 2021; 12:662091. [PMID: 34122484 PMCID: PMC8194075 DOI: 10.3389/fpls.2021.662091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/30/2021] [Indexed: 06/12/2023]
Abstract
Soybean sprouts are a flavorful microgreen that can be eaten all year round and are widely favored in Southeast Asia. In this study, the regulatory mechanism of calcium on anthocyanin biosynthesis in soybean sprouts under blue light was investigated. The results showed that blue light, with a short wavelength, effectively induced anthocyanin accumulation in the hypocotyl of soybean sprout cultivar "Dongnong 690." Calcium supplementation further enhanced anthocyanin content, which was obviously inhibited by LaCl3 and neomycin treatment. Moreover, exogenous calcium changed the metabolism of anthocyanins, and seven anthocyanin compounds were detected. The trend of calcium fluorescence intensity in hypocotyl cells, as well as that of the inositol 1,4,5-trisphosphate and calmodulin content, was consistent with that of anthocyanins content. Specific spatial distribution patterns of calcium antimonate precipitation were observed in the ultrastructure of hypocotyl cells under different conditions. Furthermore, calcium application upregulated the expression of genes related to anthocyanin biosynthesis, and calcium inhibitors suppressed these genes. Finally, transcriptomics was performed to gain global insights into the molecular regulation mechanism of calcium-associated anthocyanin production. Genes from the flavonoid biosynthesis pathway were distinctly enriched among the differentially expressed genes, and weighted gene co-expression network analysis showed that two MYBs were related to the accumulation of anthocyanins. These results indicated that calcium released from apoplast and intracellular stores in specific spatial-temporal features promote blue light-induced anthocyanin accumulation by upregulation of the expression of genes related to anthocyanin synthesis of "Dongnong 690" hypocotyl. The findings deepen the understanding of the calcium regulation mechanism of blue light-induced anthocyanin accumulation in soybean sprouts, which will help growers produce high-quality foods beneficial for human health.
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Xiong T, Tan Q, Li S, Mazars C, Galaud JP, Zhu X. Interactions between calcium and ABA signaling pathways in the regulation of fruit ripening. JOURNAL OF PLANT PHYSIOLOGY 2021; 256:153309. [PMID: 33197829 DOI: 10.1016/j.jplph.2020.153309] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/21/2020] [Accepted: 10/23/2020] [Indexed: 05/18/2023]
Abstract
Fruit ripening and senescence are finely controlled by plant hormones such as ethylene and abscisic acid (ABA) but also by calcium ions and by calcium-dependent signaling pathways. Although there are extensive data supporting an interaction between ethylene and calcium in fruit ripening, the regulatory mechanisms resulting from the interaction between ABA and calcium have not yet been fully clarified. In this article, we have reviewed the full roles of calcium and its sensors (CaM, CMLs, CDPKs, CBLs) as well as ABA and the interactions between the two signaling pathways in the regulation of stress responses and in fruit ripening. To illustrate the possible interaction between calcium sensors and ABA signaling components in the control of fruit ripening, we propose an interaction model between the calcium and ABA signaling pathways.
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Affiliation(s)
- Tiantian Xiong
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Qinqin Tan
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center for Postharvest Technology of Horticultural Crops in South China, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Shaoshan Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Chiristian Mazars
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24, chemin de Borde-Rouge, Auzeville, 31320, Castanet-Tolosan, France
| | - Jean-Philippe Galaud
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24, chemin de Borde-Rouge, Auzeville, 31320, Castanet-Tolosan, France.
| | - Xiaoyang Zhu
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center for Postharvest Technology of Horticultural Crops in South China, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
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14
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Shi J, Zhang X, Zhang Y, Lin X, Li B, Chen Z. Integrated metabolomic and transcriptomic strategies to understand the effects of dark stress on tea callus flavonoid biosynthesis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:549-559. [PMID: 32846390 DOI: 10.1016/j.plaphy.2020.07.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 07/15/2020] [Accepted: 07/31/2020] [Indexed: 05/18/2023]
Abstract
Flavonoid biosynthesis is a crucial secondary metabolism process for tea plants. Its metabolism is affected by multiple environmental factors, especially light. Shade, also known as dark stress (DS), is generally used during cultivation to improve tea quality by influencing the flavonoid accumulation. To explore the molecular mechanisms of flavonoid biosynthesis under DS, metabolomics and transcriptomics (METR) analyses were performed in tea callus via culturing the plants in vitro using 12 h light/12 h dark cycles (A) or completely dark (B) conditions for 30 days. In total, 161 differential metabolic products (DMPs) and 3592 differential expression genes (DEGs) were identified. The major flavonoids including epicatechin gallate, catechin gallate, gallocatechin-catechin, cyanidin 3-O-glucoside and the total of catechin, anthocyanin and proanthocyanidin contents were all remarkably down-regulated in tea callus under DS. Meanwhile, 9 genes including CsPAL, Cs4CL, CsCHS, CsFLS, CsDFR, CsANS, CsLAR, CsANR, and CsUFGT determined to be responsible for the flavonoid biosynthesis. In addition, 2 transcription factors (TFs) including CsMYBT1 and CsMYBT2 verified to play key role in regulation the flavonoid biosynthesis. These results helped us further understand the underlying molecular mechanism of flavonoid metabolism in tea plants.
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Affiliation(s)
- Jing Shi
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Xue Zhang
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Yuanyuan Zhang
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Xiaorong Lin
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China
| | - Bin Li
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China; Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, South China Agricultural University, Guangzhou, Guangdong, PR China
| | - Zhongzheng Chen
- College of Food Science, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong, PR China; Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, South China Agricultural University, Guangzhou, Guangdong, PR China.
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15
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Martins V, Billet K, Garcia A, Lanoue A, Gerós H. Exogenous calcium deflects grape berry metabolism towards the production of more stilbenoids and less anthocyanins. Food Chem 2020; 313:126123. [DOI: 10.1016/j.foodchem.2019.126123] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/10/2019] [Accepted: 12/23/2019] [Indexed: 01/10/2023]
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16
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Smith A, Page BDG, Collier AC, Coughtrie MWH. Homology Modeling of Human Uridine-5'-diphosphate-glucuronosyltransferase 1A6 Reveals Insights into Factors Influencing Substrate and Cosubstrate Binding. ACS OMEGA 2020; 5:6872-6887. [PMID: 32258923 PMCID: PMC7114752 DOI: 10.1021/acsomega.0c00205] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 03/11/2020] [Indexed: 05/05/2023]
Abstract
The elimination of numerous endogenous compounds and xenobiotics via glucuronidation by uridine-5'-diphosphate glycosyltransferase enzymes (UGTs) is an essential process of the body's chemical defense system. UGTs have distinct but overlapping substrate preferences, but the molecular basis for their substrate specificity remains poorly understood. Three-dimensional protein structures can greatly enhance our understanding of the interactions between enzymes and their substrates, but because of the inherent difficulties in purifying and crystallizing integral endoplasmic reticulum membrane proteins, no complete mammalian UGT structure has yet been produced. To address this problem, we have created a homology model of UGT1A6 using I-TASSER to explore, in detail, the interactions of human UGT1A6 with its substrates. Ligands were docked into our model in the presence of the cosubstrate uridine-5'-diphosphate-glucuronic acid, interacting residues were examined, and poses were compared to those cocrystallized with various plant and bacterial glycosyltransferases (GTs). Our model structurally resembles other GTs, and docking experiments replicated many of the expected UGT-substrate interactions. Some bias toward the template structures' protein-substrate interactions and binding preferences was evident.
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17
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Michailidis M, Karagiannis E, Tanou G, Sarrou E, Stavridou E, Ganopoulos I, Karamanoli K, Madesis P, Martens S, Molassiotis A. An integrated metabolomic and gene expression analysis identifies heat and calcium metabolic networks underlying postharvest sweet cherry fruit senescence. PLANTA 2019; 250:2009-2022. [PMID: 31531781 DOI: 10.1007/s00425-019-03272-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 09/05/2019] [Indexed: 05/22/2023]
Abstract
Ηeat and calcium treatments reprogram sweet cherry fruit metabolism during postharvest senescence as evidenced by changes in respiration, amino acid metabolism, sugars, and secondary metabolites shift. Heat and calcium treatments are used to improve postharvest fruit longevity; however, the exact mechanism remains poorly understood. To characterize the impact of these treatments on sweet cherries metabolism, 'Lapins' fruits were treated with heat or CaCl2 solutions and their combination and subsequently were exposed at room temperature, for up to 4 days, defined as senescence period. Single and combined heat and calcium treatments partially delayed fruit senescence, as evidenced by changes in fruit colour darkening, skin penetration force, and respiration activity. Calcium content was noticeably increased by heat in Ca-treated fruit. Several primary metabolites, including amino acids, organic acids, and alcohols, were decreased in response to both treatments, while many soluble sugars and secondary metabolites were increased within 1 day post-treatment. Changes of several metabolites in heat-treated fruits, especially esculetin, peonidin 3-O-glucoside and peonidin 3-O-galactoside, ribose, pyroglutamate, and isorhamnetin-3-O-rutinoside, were detected. The metabolome of fruit exposed to calcium also displayed substantial modulations, particularly in the levels of galactose, glycerate, aspartate, tryptophan, phospharate rutin, and peonidin 3-O-glucoside. The expression of several genes involved in TCA cycle (MDH1, IDH1, OGDH, SUCLA2, and SDH1-1), pectin degradation (ADPG1) as well as secondary (SK1, 4CL1, HCT, and BAN), amino acids (ALDH18A1, ALDH4A1, GS, GAD, GOT2, OPLAH, HSDH, and SDS), and sugar (PDHA1 and DLAT) metabolism were affected by both treatments. Pathway-specific analysis further revealed the regulation of fruit metabolic programming by heat and calcium. This work provides a comprehensive understanding of metabolic regulation in response to heat and calcium during fruit senescence.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thermi, 57001, Thessaloniki, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thermi, 57001, Thessaloniki, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, 57001, Thessaloníki, Greece
| | - Eirini Sarrou
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, 57001, Thessaloníki, Greece
| | | | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, 57001, Thessaloníki, Greece
| | - Katerina Karamanoli
- Laboratory of Agricultural Chemistry, School of Agriculture, Aristotle University of Thessaloniki, Thessaloníki, 54124, Greece
| | | | - Stefan Martens
- Department of Food Quality and Nutrition, Centro Ricerca E Innovazione, Fondazione Edmund Mach, San Michele All'adige, 38010, Trento, Italy
| | - Athanassios Molassiotis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thermi, 57001, Thessaloniki, Greece.
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18
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Markulin L, Drouet S, Corbin C, Decourtil C, Garros L, Renouard S, Lopez T, Mongelard G, Gutierrez L, Auguin D, Lainé E, Hano C. The control exerted by ABA on lignan biosynthesis in flax (Linum usitatissimum L.) is modulated by a Ca 2+ signal transduction involving the calmodulin-like LuCML15b. JOURNAL OF PLANT PHYSIOLOGY 2019; 236:74-87. [PMID: 30928768 DOI: 10.1016/j.jplph.2019.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 03/07/2019] [Accepted: 03/09/2019] [Indexed: 05/23/2023]
Abstract
The LuPLR1 gene encodes a pinoresinol lariciresinol reductase responsible for the biosynthesis of (+)-secoisolariciresinol, a cancer chemopreventive lignan, highly accumulated in the seedcoat of flax (Linum usitatissimum L.). Abscisic acid (ABA) plays a key role in the regulation of LuPLR1 gene expression and lignan accumulation in both seeds and cell suspensions, which require two cis-acting elements (ABRE and MYB2) for this regulation. Ca2+ is a universal secondary messenger involved in a wide range of physiological processes including ABA signaling. Therefore, Ca2+ may be involved as a mediator of LuPLR1 gene expression and lignan biosynthesis regulation exerted by ABA. To test the potential implication of Ca2+ signaling, a pharmacological approach was conducted using both flax cell suspensions and maturing seed systems coupled with a ß-glucuronidase reporter gene experiment, RT-qPCR analysis, lignan quantification as well as Ca2+ fluorescence imaging. Exogenous ABA application results in an increase in the intracellular Ca2+ cytosolic concentration, originating mainly from the extracellular medium. Promoter-reporter deletion experiments suggest that the ABRE and MYB2 cis-acting elements of the LuPLR1 gene promoter functioned as Ca2+-sensitive sequences involved in the ABA-mediated regulation. The use of specific inhibitors pointed the crucial roles of the Ca2+ sensors calmodulin-like proteins and Ca2+-dependent protein kinases in this regulation. This regulation appeared conserved in the two different studied systems, i.e. cell suspensions and maturing seeds. A calmodulin-like, LuCML15b, identified from gene network analysis is proposed as a key player involved in this signal transduction since RNAi experiments provided direct evidences of this role. Taken together, these results provide new information on the regulation of plant defense and human health-promoting compounds, which could be used to optimize their production.
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Affiliation(s)
- Lucija Markulin
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Cyrielle Corbin
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Cédric Decourtil
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Laurine Garros
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Sullivan Renouard
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Tatiana Lopez
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Gaëlle Mongelard
- Centre de Ressources Régionales en Biologie Moléculaire (CRRBM), Université Picardie Jules Verne, 33 rue Saint-Leu, F-80039 Amiens, France
| | - Laurent Gutierrez
- Centre de Ressources Régionales en Biologie Moléculaire (CRRBM), Université Picardie Jules Verne, 33 rue Saint-Leu, F-80039 Amiens, France
| | - Daniel Auguin
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Eric Lainé
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA, USC1328, Université d'Orléans, Pôle Universitaire d'Eure et Loir, 21 rue de Loigny la Bataille, F-28000 Chartres, France; Bioactifs et Cosmétiques, GDR 3711 COSMACTIFS, CNRS Université d'Orléans, rue de Chartres, F-45100 Orléans, France.
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19
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Fidan-Yardimci M, Akay S, Sharifi F, Sevimli-Gur C, Ongen G, Yesil-Celiktas O. A novel niosome formulation for encapsulation of anthocyanins and modelling intestinal transport. Food Chem 2019; 293:57-65. [PMID: 31151649 DOI: 10.1016/j.foodchem.2019.04.086] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 03/31/2019] [Accepted: 04/24/2019] [Indexed: 01/01/2023]
Abstract
The bioavailability of drugs can be improved by regulating the structural properties, particularly lipoid systems, such as niosomes, can increase cellular uptake. Herein, we optimized double emulsion and niosomal formulations for encapsulating anthocyanin-rich black carrot extract. Nanoparticles obtained by selected formulation were characterized in terms of morphology, particle size, drug encapsulation efficiency, in vitro release and cytotoxicity. The optimum conditions for niosomal formulation were elicited as 30 mg of cholesterol, 150 mg of Tween 20 and feeding time of 1 min at a stirring rate of 900 rpm yielding the lowest average particle size of 130 nm. In vitro release data showed the majority of the encapsulated anthocyanins were released at the end of 10 h. A mathematical model was developed to estimate the absorption of anthocyanins released from niosomes and cytotoxicity was assessed against neuroblastoma. Overall, these findings suggest that niosomal vesicles might be suitable delivery systems for anthocyanins.
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Affiliation(s)
- Melike Fidan-Yardimci
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100 Bornova, Izmir, Turkey
| | - Seref Akay
- Department of Genetics & Bioengineering, Faculty of Engineering, Gumushane University, 29100 Gumushane, Turkey
| | - Fatemeh Sharifi
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge 02139, MA, USA; Mechanical Engineering Department, Faculty of Engineering, Sharif University of Technology, Tehran, Iran
| | - Canan Sevimli-Gur
- Department of Biology, Biotechnology Discipline, Science and Art Faculty, Kocaeli University, 41380 Izmit, Kocaeli, Turkey
| | - Gaye Ongen
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100 Bornova, Izmir, Turkey
| | - Ozlem Yesil-Celiktas
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100 Bornova, Izmir, Turkey; Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge 02139, MA, USA.
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20
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Martins V, Garcia A, Costa C, Sottomayor M, Gerós H. Calcium- and hormone-driven regulation of secondary metabolism and cell wall enzymes in grape berry cells. JOURNAL OF PLANT PHYSIOLOGY 2018; 231:57-67. [PMID: 30218930 DOI: 10.1016/j.jplph.2018.08.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 08/01/2018] [Accepted: 08/27/2018] [Indexed: 05/29/2023]
Abstract
The efficacy of calcium sprays for improving fleshy fruit resistance to abiotic/biotic stress and enhancement of fruit shelf life has increasingly been explored. However, because calcium is a powerful secondary messenger in many signaling pathways, including those driven by abscisic acid (ABA) and jasmonates, it may interfere with the biosynthesis of specialized metabolites highly important for fruit and wine quality, such as phenolic compounds. In this study, a combination of biochemical and molecular biology approaches were applied to grape cell cultures and detached grape berries, in order to investigate the effect of calcium in the modulation of enzymes involved in the biosynthesis of phenolic compounds and in cell wall organization. Concentrations up to 10 mM CaCl2 did not affect cell growth, size or viability, but triggered modifications in total phenolics content, particularly in anthocyanin levels in grape cell suspensions. The effects of calcium applied alone or in combination with ABA or methyl jasmonate (MeJA) were visible in several branches of specialized metabolic pathways, confirming that the calcium-hormone interplay regulates the expression of phenylalanine ammonia lyase (PAL), stilbene synthase (STS), dihydroflavonol reductase (DFR) and UDP-glucose:flavonoid 3-O-glucosyltransferase (UFGT). The activity of PAL and UFGT enzymes was also specifically modulated by calcium, ABA and MeJA. These results closely correlated to the modifications observed in the expression of VvAM1 and VvABCC1 encoding vacuolar anthocyanin transporters. Modulation of the expression and activity of pectin methyl esterases (PME) and polygalacturonases (PG) by calcium was also evident, confirming an important role of calcium in cell wall organization via the regulation of enzyme activity, besides its well-known role in the formation of cross links between pectin molecules. Overall, this study uncovers important biochemical mechanisms induced by calcium and stress hormones on grape berries, and highlights the need to consider the consequences of calcium treatments and stress for fruit quality.
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Affiliation(s)
- Viviana Martins
- Centro de Biologia Molecular e Ambiental (CBMA), Departamento de Biologia, Escola de Ciências, Universidade do Minho, 4710-057, Braga, Portugal; Centro de Investigação e de Tecnologias Agro-ambientais e Biológicas CITAB-UM, Departamento de Biologia, Escola de Ciências, Universidade do Minho, 4710-057, Braga, Portugal.
| | - Ana Garcia
- Centro de Biologia Molecular e Ambiental (CBMA), Departamento de Biologia, Escola de Ciências, Universidade do Minho, 4710-057, Braga, Portugal
| | - Cátia Costa
- Centro de Biologia Molecular e Ambiental (CBMA), Departamento de Biologia, Escola de Ciências, Universidade do Minho, 4710-057, Braga, Portugal
| | - Mariana Sottomayor
- CIBIO-InBIO, Universidade do Porto, Campus de Vairão, Rua Padre Armando Quintas, Vairão, Portugal; Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Hernâni Gerós
- Centro de Biologia Molecular e Ambiental (CBMA), Departamento de Biologia, Escola de Ciências, Universidade do Minho, 4710-057, Braga, Portugal; Centro de Investigação e de Tecnologias Agro-ambientais e Biológicas CITAB-UM, Departamento de Biologia, Escola de Ciências, Universidade do Minho, 4710-057, Braga, Portugal; Centro de Engenharia Biológica (CEB), Universidade do Minho, 4710-057, Braga, Portugal
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21
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Wu LY, Fang ZT, Lin JK, Sun Y, Du ZZ, Guo YL, Liu JH, Liang YR, Ye JH. Complementary iTRAQ Proteomic and Transcriptomic Analyses of Leaves in Tea Plant ( Camellia sinensis L.) with Different Maturity and Regulatory Network of Flavonoid Biosynthesis. J Proteome Res 2018; 18:252-264. [PMID: 30427694 DOI: 10.1021/acs.jproteome.8b00578] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The quality of tea is highly related with the maturity of the fresh tea leaves at harvest. The present study investigated the proteomic and transcriptomic profiles of tea leaves with different maturity, using iTRAQ and RNA-seq technologies. A total of 4455 proteins and 27 930 unigenes were identified, with functional enrichment analyses of GO categorization and KEGG annotation. The compositions of flavonoids (catechins and flavonols) in tea leaves were determined. The total content of flavonoids decreased with leaf maturity, in accordance with the protein regulation patterns of shikimate, phenylpropanoid, and flavonoid pathways. The abundance of ANR had a positive correlation with epi-catechin content, while LAR abundance was positively related with catechin content ( P < 0.05). The biosynthetic network of flavonoid biosynthesis was discussed in combination with photosynthesis, primary metabolism, and transcription factors. Bud had the lowest activities of photosynthesis and carbon fixation but the highest flavonoid biosynthesis ability in opposite to mature leaf. SUS-INV switch might be an important joint for carbon flow shifting into the follow-up biochemical syntheses. This work provided a comprehensive overview on the functional protein profile changes of tea leaves at different growing stages and also proposed a research direction regarding the correlations between primary metabolism and flavonoid biosynthesis.
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Affiliation(s)
- Liang-Yu Wu
- College of Horticulture , Fujian Agriculture and Forestry University , 15 Shangxiadian Road , Fuzhou 350002 , China
| | - Zhou-Tao Fang
- Tea Research Institute , Zhejiang University , Hangzhou 310013 , China
| | - Jin-Ke Lin
- Anxi College of Tea Science , Fujian Agriculture and Forestry University , 15 Shangxiadian Road , Fuzhou 350002 , China
| | - Yun Sun
- College of Horticulture , Fujian Agriculture and Forestry University , 15 Shangxiadian Road , Fuzhou 350002 , China.,Key Laboratory of Tea Science in Universities of Fujian Province , Fujian Agriculture and Forestry University , Fuzhou 350002 , China
| | - Zhi-Zheng Du
- College of Horticulture , Fujian Agriculture and Forestry University , 15 Shangxiadian Road , Fuzhou 350002 , China
| | - Ya-Ling Guo
- College of Horticulture , Fujian Agriculture and Forestry University , 15 Shangxiadian Road , Fuzhou 350002 , China.,Key Laboratory of Tea Science in Universities of Fujian Province , Fujian Agriculture and Forestry University , Fuzhou 350002 , China
| | - Jiang-Hong Liu
- College of Horticulture , Fujian Agriculture and Forestry University , 15 Shangxiadian Road , Fuzhou 350002 , China
| | - Yue-Rong Liang
- Tea Research Institute , Zhejiang University , Hangzhou 310013 , China
| | - Jian-Hui Ye
- Tea Research Institute , Zhejiang University , Hangzhou 310013 , China
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22
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Zhang X, Wei J, Huang Y, Shen W, Chen X, Lu C, Su N, Cui J. Increased Cytosolic Calcium Contributes to Hydrogen-Rich Water-Promoted Anthocyanin Biosynthesis Under UV-A Irradiation in Radish Sprouts Hypocotyls. FRONTIERS IN PLANT SCIENCE 2018; 9:1020. [PMID: 30061912 PMCID: PMC6055044 DOI: 10.3389/fpls.2018.01020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 06/22/2018] [Indexed: 05/14/2023]
Abstract
Our previous studies showed that hydrogen-rich water (HRW) promoted the biosynthesis of anthocyanin under UV-A in radish. However, molecular mechanism involved in the regulation of the anthocyanin biosynthesis is still unclear. In this study, the role of calcium (Ca2+) in HRW-promoted anthocyanin biosynthesis in radish sprouts hypocotyls under UV-A was investigated. The results showed that a positive effect of HRW on the content of cytosolic calcium and anthocyanin accumulation, mimicking the effects of induced CaCl2. Exogenous addition of Ca2+ chelator bis (β-aminoethylether)-N,N,N',N'-tetraacetic acid (EGTA) and inositol 1,4,5-trisphosphate (IP3) synthesis inhibitor neomycin partially reversed the facilitated effect of HRW. The positive effects of HRW on activity of anthocyanin biosynthetic-enzymes (L-phenylalanine ammonia-lyase, PAL; chalcone isomerase, CHI; dihydroflavonol 4-reductase, DFR and UDP glc-flavonoid 3-O-glucosyl transferase, UFGT) were reversed by EGTA and neomycin. Further tests confirmed that the upregulation of anthocyanin biosynthetic related genes induced by HRW was substantially inhibited by calcium antagonists. The possible involvement of CaM in HRW-regulated anthocyanin biosynthesis was also preliminarily investigated in this study. Taken together, our results indicate that IP3-dependent calcium signaling pathway might be involved in HRW-regulated anthocyanin biosynthesis under UV-A irradiation.
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Affiliation(s)
- Xiaoyan Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Nottingham, United Kingdom
| | - Junyu Wei
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yifan Huang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Wenbiao Shen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Xin Chen
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Chungui Lu
- School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Nottingham, United Kingdom
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
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23
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Akhatou I, Sayago A, González-Domínguez R, Fernández-Recamales Á. Application of Targeted Metabolomics to Investigate Optimum Growing Conditions to Enhance Bioactive Content of Strawberry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:9559-9567. [PMID: 29019668 DOI: 10.1021/acs.jafc.7b03701] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A simple, sensitive, and rapid assay based on liquid chromatography coupled to tandem mass spectrometry was designed for simultaneous quantitation of secondary metabolites in order to investigate the influence of variety and agronomic conditions on the biosynthesis of bioactive compounds in strawberry. For this purpose, strawberries belonging to three varieties with different sensitivity to environmental conditions ('Camarosa', 'Festival', 'Palomar') were grown in a soilless system under multiple agronomic conditions (electrical conductivity, substrate type, and coverage). Targeted metabolomic analysis of polyphenolic compounds, combined with advanced chemometric methods based on learning machines, revealed significant differences in multiple bioactives, such as chlorogenic acid, ellagic acid rhamnoside, sanguiin H10, quercetin 3-O-glucuronide, catechin, procyanidin B2, pelargonidin 3-O-glucoside, cyanidin 3-O-glucoside, and pelargonidin 3-O-rutinoside, which play a pivotal role in organoleptic properties and beneficial healthy effects of these polyphenol-rich foods.
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Affiliation(s)
- Ikram Akhatou
- Department of Chemistry, Faculty of Experimental Sciences, University of Huelva , 21007 Huelva, Spain
- International Campus of Excellence CeiA3, University of Huelva , 21007 Huelva, Spain
| | - Ana Sayago
- Department of Chemistry, Faculty of Experimental Sciences, University of Huelva , 21007 Huelva, Spain
- International Campus of Excellence CeiA3, University of Huelva , 21007 Huelva, Spain
| | - Raúl González-Domínguez
- Department of Chemistry, Faculty of Experimental Sciences, University of Huelva , 21007 Huelva, Spain
- International Campus of Excellence CeiA3, University of Huelva , 21007 Huelva, Spain
| | - Ángeles Fernández-Recamales
- Department of Chemistry, Faculty of Experimental Sciences, University of Huelva , 21007 Huelva, Spain
- International Campus of Excellence CeiA3, University of Huelva , 21007 Huelva, Spain
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24
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Zou B, Wan D, Li R, Han X, Li G, Wang R. Calmodulin-binding protein CBP60g functions as a negative regulator in Arabidopsis anthocyanin accumulation. PLoS One 2017; 12:e0173129. [PMID: 28253311 PMCID: PMC5333885 DOI: 10.1371/journal.pone.0173129] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 02/15/2017] [Indexed: 11/18/2022] Open
Abstract
Anthocyanins, a kind of flavonoid, normally accumulate in the flowers and fruits and make them colorful. Anthocyanin accumulation is regulated via the different temporal and spatial expression of anthocyanin regulatory and biosynthetic genes. CBP60g, a calmodulin binding protein, has previously been shown to have a role in pathogen resistance, drought tolerance and ABA sensitivity. In this study, we found that CBP60g repressed anthocyanin accumulation induced by drought, sucrose and kinetin. The expression pattern of CBP60g was in accordance with the anthocyanin accumulation tissues. Real-time qPCR analysis revealed that the anthocyanin biosynthetic genes CHS, CHI and DFR, as well as two members of MBW complex, PAP1, a MYB transcription factor, and TT8, a bHLH transcription factor, were down regulated by CBP60g.
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Affiliation(s)
- Bo Zou
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
| | - Dongli Wan
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot, P. R. China
| | - Ruili Li
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- Wulanchabu Center for Disease Control and Prevention, Jining, P. R. China
| | - Xiaomin Han
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- Department of Histology and Embryology, Baotou Medical College, Baotou, P. R. China
| | - Guojing Li
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
| | - Ruigang Wang
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- * E-mail:
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