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Mikulic-Petkovsek M, Ivancic A, Gacnik S, Veberic R, Hudina M, Marinovic S, Molitor C, Halbwirth H. Biochemical Characterization of Black and Green Mutant Elderberry during Fruit Ripening. PLANTS (BASEL, SWITZERLAND) 2023; 12:504. [PMID: 36771589 PMCID: PMC9918921 DOI: 10.3390/plants12030504] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/22/2022] [Accepted: 01/16/2023] [Indexed: 05/22/2023]
Abstract
The content of sugars, organic acids, phenolic compounds and selected enzyme activities in the anthocyanin pathway were analyzed in NIGRA (Sambucus nigra var. nigra-black fruits) and VIRIDIS (S. nigra var. viridis-green fruits) fruits over four stages of ripening. The share of glucose and fructose in green fruits was higher than in colored fruits, and the sugar content increased significantly until the third developmental stage. Ripe NIGRA berries had 47% flavonol glycosides, 34% anthocyanins, 3% hydroxycinnamic acids and 14% flavanols, whereas the major phenolic group in the VIRIDIS fruits, making up 88% of the total analyzed polyphenols, was flavonols. NIGRA fruits were rich in anthocyanins (6020 µg g-1 FW), showing strong activation of the late anthocyanin pathway (dihydroflavonol 4-reductase, anthocyanidin synthase). In both color types, phenylalanine ammonia lyase and chalcone synthase/chalcone isomerase activities were highest in the first stage and decreased during ripening. In VIRIDIS fruit, no anthocyanins and only one flavanol (procyanidin dimer) were found. This was most likely caused by a lack of induction of the late anthocyanin pathway in the last period of fruit ripening. The VIRIDIS genotype may be useful in studying the regulatory structures of anthocyanin biosynthesis and the contribution of distinct flavonoid classes to the health benefits of elderberries.
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Affiliation(s)
- Maja Mikulic-Petkovsek
- Chair for Fruit Growing, Viticulture and Vegetable Growing, Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Anton Ivancic
- 2 Chair for Genetics, Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, SI-2311 Hoce, Slovenia
| | - Sasa Gacnik
- Chair for Fruit Growing, Viticulture and Vegetable Growing, Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Robert Veberic
- Chair for Fruit Growing, Viticulture and Vegetable Growing, Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Metka Hudina
- Chair for Fruit Growing, Viticulture and Vegetable Growing, Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Silvija Marinovic
- Institute of Chemical, Environmental and Bioscience Engineering, Technische Universität Wien, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Christian Molitor
- Institute of Chemical, Environmental and Bioscience Engineering, Technische Universität Wien, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Heidi Halbwirth
- Institute of Chemical, Environmental and Bioscience Engineering, Technische Universität Wien, Getreidemarkt 9, A-1060 Vienna, Austria
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Qin Y, Li Q, An Q, Li D, Huang S, Zhao Y, Chen W, Zhou J, Liao H. A phenylalanine ammonia lyase from Fritillaria unibracteata promotes drought tolerance by regulating lignin biosynthesis and SA signaling pathway. Int J Biol Macromol 2022; 213:574-588. [PMID: 35643154 DOI: 10.1016/j.ijbiomac.2022.05.161] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/16/2022] [Accepted: 05/23/2022] [Indexed: 11/05/2022]
Abstract
Drought is one of the key threatening environmental factors for plant and agriculture. Phenylalanine ammonia lyase (PAL) is a key enzyme involved in plant defense against abiotic stress, however, the role of PAL in drought tolerance remains elusive. Here, a PAL member (FuPAL1) containing noncanonical Ala-Ser-Gly triad was isolated from Fritillaria unibracteata, one important alpine pharmaceutical plant. FuPAL1, mainly distributed in cytosol, was more conserved than FuCOMT and FuCHI at both nucleotide and amino acid levels. FuPAL1 was overexpressed in Escherichia coli and the purified recombinant FuPAL1 protein showed catalytic preference on L-Phe than L-Tyr. Homology modeling and site-mutation of FuPAL1 exhibited FuPAL1 took part in the ammonization process by forming MIO-like group, and Phe141, Ser208, Ileu218 and Glu490 played key roles in substrate binding and (or) catalysis. HPLC analysis showed that lignin and salicylic acid levels increased but total flavonoid levels decreased in FuPAL1 transgenic Arabidopsis compared to wild-type plants. Moreover, FuPAL1 transgenic Arabidopsis significantly enhanced its drought tolerance, which suggested that FuPAL1 mediated tolerance to drought by inducing the biosynthesis and accumulation of salicylic acid and lignin. Taken together, our results confirmed that the FuPAL1 played an important role in drought tolerance, and FuPAL1 might be a valuable target for genetic improvement of drought resistance in future.
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Affiliation(s)
- Yu Qin
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Qiue Li
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Qiuju An
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Dexin Li
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Sipei Huang
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Yongyang Zhao
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Weijia Chen
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Jiayu Zhou
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.
| | - Hai Liao
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.
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León-García E, Vela-Gutiérrez G, Del Ángel-Coronel OA, Torres-Palacios C, La Cruz-Medina JD, Gómez-Lim MA, García HS. Increased Postharvest Life of TomLox B Silenced Mutants of Tomato (Solanum lycopersicum) Var. TA234. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2017; 72:380-387. [PMID: 28918545 DOI: 10.1007/s11130-017-0629-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A healthy lifestyle includes fruits and vegetables consumption. Tomato is one of the most consumed vegetables, although it is susceptible to physical damage through postharvest handling, thus leading to important losses. Softening is an important variable during tomato ripening; excessive softening is undesirable and leads to postharvest losses. TomloxB plays an important role in ripening, mainly in the loss of cellular integrity caused by fatty acids released from the lipid matrix of membranes that initiate oxidative deterioration, which is in turn carried into senescence. In order to increase postharvest life, we produced transgenic tomato plants via Rhizobium radiobacter with tomato lipoxygenase B (TomloxB) antisense constructs under control of the cauliflower mosaic virus (CaMV) 35S promoter. Lipoxygenase activity and firmness were measured in tomato fruit and the fatty acids profile was determined. Transgenic fruits were maintained for 40 days at room temperature in optimal conditions, whereas wild type fruits remained in similar conditions for only six days. Firmness in pink and red stages was significantly lower in wild type fruits than in two transgenic lines. Linolenic acid was the most important fatty acid consumed by lipoxygenase in both turning and pink stages of ripening. Lipoxygenase activity was smaller in transformed fruits in comparison with the wild type. These results suggest that silencing the TomloxB gene promoted significant changes in the physiology of transformed tomatoes, being the increase in postharvest life the most important.
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Affiliation(s)
- Elizabeth León-García
- Unidad de Investigación y Desarrollo en Alimentos (UNIDA) del Instituto Tecnológico de Veracruz, Veracruz, Veracruz, Mexico
| | - Gilber Vela-Gutiérrez
- Unidad de Investigación y Desarrollo en Alimentos (UNIDA) del Instituto Tecnológico de Veracruz, Veracruz, Veracruz, Mexico
| | - Oscar A Del Ángel-Coronel
- Unidad de Investigación y Desarrollo en Alimentos (UNIDA) del Instituto Tecnológico de Veracruz, Veracruz, Veracruz, Mexico
| | - Cristobal Torres-Palacios
- Unidad de Investigación y Desarrollo en Alimentos (UNIDA) del Instituto Tecnológico de Veracruz, Veracruz, Veracruz, Mexico
| | - Javier De La Cruz-Medina
- Unidad de Investigación y Desarrollo en Alimentos (UNIDA) del Instituto Tecnológico de Veracruz, Veracruz, Veracruz, Mexico
| | - Miguel A Gómez-Lim
- Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) Irapuato, Guanajuato, Mexico.
| | - Hugo Sergio García
- Unidad de Investigación y Desarrollo en Alimentos (UNIDA) del Instituto Tecnológico de Veracruz, Veracruz, Veracruz, Mexico.
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Guo B, He W, Wu D, Che D, Fan P, Xu L, Wei Y. Proteomic analysis of tomato (Lycopersicum esculentum var. cerasifarm) expressing the HBsAg gene by 2-dimensional difference gel electrophoresis. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2013; 68:424-429. [PMID: 24057504 DOI: 10.1007/s11130-013-0387-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In a previous study, an HBsAg gene-bearing transgenic tomato line was made available and it exhibited notable physiological alterations compared with the non-transgenic tomato (control). In particular, leaves of the transgenic plants were fleshy and dark. We hypothesized that a change in leaf proteins of the transgenic plants account for the observed phenotypes. In this study, total protein content in leaves of the transgenic plants was analyzed by 2-dimensional difference gel electrophoresis. A total number of 700 protein spots were detected on silver-stained gels, of which 368 protein spots were matched between the control and sample gels. Among these matched proteins, the expression levels of 122 proteins in the transgenic plants were upregulated while those of the rest were downregulated. In addition, 25 abundant proteins (value ratio > 2.0) on silver-stained gels were analyzed by matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Sixteen differentially expressed proteins were identified, of which 13 were predicted to be involved in cell division, energy metabolism, protein synthesis and processing. The possible roles of these proteins in the transgenic tomato strain have been discussed. Taken together, our data indicate that significant alterations in protein expression occur in transgenic tomatoes bearing the HBsAg gene. Our findings will help broaden our knowledge of the mechanism by which exogenously expressed genes lead to phenotypic alterations in transgenic plants.
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Affiliation(s)
- Bin Guo
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Xi'an, 710069, China
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