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Kaplan Y, Wang Y, Manasherova E, Cohen H, Ginzberg I. Metabolic and gene-expression analyses reveal developmental dynamics of cutin deposition in pomegranate fruit grown under different environmental conditions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 215:108991. [PMID: 39106765 DOI: 10.1016/j.plaphy.2024.108991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 07/23/2024] [Accepted: 07/30/2024] [Indexed: 08/09/2024]
Abstract
The chemical and transcriptional changes in the cuticle of pomegranate (Punica granatum L.) fruit grown under different environmental conditions were studied. We collected fruit from three orchards located in different regions in Israel, each with a distinct microclimate. Fruit were collected at six phenological stages, and cutin monomers in the fruit cuticle were profiled by gas chromatography-mass spectrometry (GC-MS), along with qPCR transcript-expression analyses of selected cutin-related genes. While fruit phenotypes were comparable along development in all three orchards, principal component analyses of cutin monomer profiles suggested clear separation between cuticle samples of young green fruit to those of maturing fruit. Moreover, total cutin contents in green fruit were lower in the orchard characterized by a hot and dry climate compared to orchards with moderate temperatures. The variances detected in total cutin contents between orchards corresponded well with the expression patterns of BODYGUARD, a key biosynthetic gene operating in the cutin biosynthetic pathway. Based on our extraction protocols, we found that the cutin polyester that builds the pomegranate fruit cuticle accumulates some levels of gallic acid-the precursor of punicalagin, a well-known potent antioxidant metabolite in pomegranate fruit. The gallic acid was also one of the predominant metabolites contributing to the variability between developmental stages and orchards, and its accumulation levels were opposite to the expression patterns of the UGT73AL1 gene which glycosylates gallic acid to synthesize punicalagin. To the best of our knowledge, this is the first detailed composition of the cutin polyester that forms the pomegranate fruit cuticle.
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Affiliation(s)
- Yulia Kaplan
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization (ARO), Volcani Institute, 68 HaMaccabim Road, P.O. Box 15159, Rishon LeZion, 7505101, Israel.
| | - Yuying Wang
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization (ARO), Volcani Institute, 68 HaMaccabim Road, P.O. Box 15159, Rishon LeZion, 7505101, Israel.
| | - Ekaterina Manasherova
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization (ARO), Volcani Institute, 68 HaMaccabim Road, P.O. Box 15159, Rishon LeZion, 7505101, Israel.
| | - Hagai Cohen
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization (ARO), Volcani Institute, 68 HaMaccabim Road, P.O. Box 15159, Rishon LeZion, 7505101, Israel.
| | - Idit Ginzberg
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization (ARO), Volcani Institute, 68 HaMaccabim Road, P.O. Box 15159, Rishon LeZion, 7505101, Israel.
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Ruffini E, Bianchi Oltolini A, Magni M, Beretta G, Cavallaro M, Suriano R, Turri S. Crosslinked Polyesters as Fully Biobased Coatings with Cutin Monomer from Tomato Peel Wastes. Polymers (Basel) 2024; 16:682. [PMID: 38475363 DOI: 10.3390/polym16050682] [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: 01/05/2024] [Revised: 02/26/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024] Open
Abstract
Cutin, one of the main structural components of tomato peels, is a waxy biopolymer rich in hydroxylated fatty acids. In this study, 10,16-dihydroxyhexadecanoic acid (10,16-diHHDA) was extracted and isolated from tomato peels and exploited to develop fully crosslinked polyesters as potential candidates for replacing fossil-based metal protective coatings. A preliminary screening was conducted to select the base formulation, and then a design of experiments (DoE) was used as a methodology to identify the optimal composition to develop a suitable coating material. Different formulations containing 10,16-diHHDA and other biorefinery monomers, including 2,5-furandicarboxylic acid, were considered. To this end, all polyesters were characterized through differential scanning calorimetry (DSC) and gel content measurements to determine their Tg value and crosslinking efficiency. Compositions exhibiting the best trade-off between Tg value, chemical resistance, and sufficiently high 10,16-diHHDA content between 39 and 48 wt.% were used to prepare model coatings that were characterized for assessing their wettability, scratch hardness, chemical resistance, and adhesion to metal substrates. These polyester coatings showed a Tg in the range of 45-55 °C, a hydrophobic behavior with a water contact angle of around 100°, a good solvent resistance (>100 MEK double rubs), and an adhesion strength to steel higher than 2 MPa. The results obtained confirmed the potential of cutin-based resins as coatings for metal protection, meeting the requirements for ensuring physicochemical properties of the final product, as well as for optimizing the valorization of such an abundant agri-food waste as tomato peels.
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Affiliation(s)
- Eleonora Ruffini
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Andrea Bianchi Oltolini
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Mirko Magni
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
| | - Giangiacomo Beretta
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
| | - Marco Cavallaro
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Raffaella Suriano
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Stefano Turri
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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3
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Lv G, Shan D, Ma Y, Zhang W, Ciren D, Jiang S, Dang B, Zhang J, Sun W, Mao H. In-situ quantitative prediction of pesticide residues on plant surface by ATR-FTIR technique coupled with chemometrics. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123432. [PMID: 37837928 DOI: 10.1016/j.saa.2023.123432] [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: 07/06/2023] [Revised: 08/24/2023] [Accepted: 09/18/2023] [Indexed: 10/16/2023]
Abstract
Pesticide residues on plant surfaces pose a severe threat to food security, yet most research has focused on monitoring the liquid matrix, with few reports conducting in-situ analysis of the residues. This study was the first to attempt to utilize portable attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) for in-situ characterization of broad-spectrum fungicide boscalid residues on plant surfaces. ATR-FTIR scanning of tomato fruits with pre-determined concentrations of boscalid residues was conducted without any pre-treatment, and the obtained spectra were then processed using chemometrics methods. The results demonstrated a negative correlation between the residual concentrations and their corresponding absorption intensities of several well-resolved peaks from the spectra, resulting in a high accuracy of 93.33% for the classification model created by probabilistic neural network (PNN) coupled with principal component analysis (PCA). By employing correlation analysis and the interval partial least squares method (iPLS), quantitative analysis was conducted on the wavenumber ranges of 1000-1800 cm-1 and 2700-2900 cm-1 from the spectra. The regression model, established through partial least squares regression (PLSR), demonstrated exceptional performance with an R2 value of 0.80, RMSE of 1.02 μg/cm2, RPD of 2.0, and RPIQ of 2.1 for validation. Meanwhile, the detection limit (LOD) of the model was calculated as 3.06 μg/cm2. This report highlights the potential of using portable ATR-FTIR for conducting qualitative and quantitative monitoring of pesticide residues both in-situ and on-site. It also provides references for other measuring techniques.
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Affiliation(s)
- Gaoqiang Lv
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Didi Shan
- Nanjing Institute of Environmental Science, Ministry of Ecological Environment, Nanjing 210042, China
| | - Yongge Ma
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Wenya Zhang
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Duobujie Ciren
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shuo Jiang
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Bojun Dang
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jiashun Zhang
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Weihong Sun
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Hanping Mao
- Department of Facility Agricultural Science and Engineering, College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China.
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Arrieta-Baez D, Quezada Huerta C, Rojas-Torres GS, Perea-Flores MDJ, Mendoza-León HF, Gómez-Patiño MB. Structural Studies of Mexican Husk Tomato ( Physalis ixocarpa) Fruit Cutin. Molecules 2023; 29:184. [PMID: 38202766 PMCID: PMC10780591 DOI: 10.3390/molecules29010184] [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: 11/17/2023] [Revised: 12/11/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Green tomato (Physalis ixocarpa) is a specie native to Mexico, and it is known as "tomatillo" or "husk tomato". The fruit contains vitamins, minerals, phenolic compounds, and steroidal lactones, presenting antimicrobial activity and antinarcotic effects. Therefore, it is not only used in traditional Mexican cuisine, but also in traditional medicine to relieve some discomforts such as fever, cough, and amygdalitis. However, it is a perishable fruit whose shelf life is very short. As a part of the peel, cuticle, and epicuticular waxes represent the most important part in plant protection, and the specific composition and structural characterization are significant to know how this protective biopolymer keeps quality characteristics in fresh fruits. P. ixocarpa cutin was obtained by enzymatic treatments (cellulase, hemicellulose, and pectinase) and different concentrations of TFA, and studied through Cross Polarization Magic Angle Spinning Nuclear Magnetic Resonance (CPMAS 13C NMR), Ultra-High Performance Liquid Chromatography coupled to Mass Spectrometry (UHPLC-MS), and was morphologically characterized by Confocal Laser Scanning Microscopy (CLSM) and Scanning Electron Microscopy (SEM). The main constituents identified under the basis of UHPLC-MS analysis were 9,10,18-trihydroxy-octadecanoic acid and 9,10-epoxy-18-hydroxy-octadecanoic acid with 44.7 and 37.5%, respectively. The C16 absence and low occurrence of phenolic compounds, besides the presence of glandular trichomes, which do not allow a continuous layer on the surface of the fruit, could be related to a lower shelf life compared with other common fruits such as tomato (Solanum lycopersicum).
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Affiliation(s)
- Daniel Arrieta-Baez
- Instituto Politécnico Nacional—(Centro de Nanociencias y Micro y Nanotecnologías), Unidad Profesional Adolfo López Mateos, Col. Zacatenco, Mexico City 07738, Mexico; (D.A.-B.); (M.d.J.P.-F.); (H.F.M.-L.)
| | - Camila Quezada Huerta
- Instituto Politécnico Nacional, Escuela Superior de Ingeniería Química e Industrias Extractivas, Unidad Profesional Adolfo López Mateos, Av. Luis Enrique Erro S/N, Colonia Lindavista 07738, Mexico; (C.Q.H.); (G.S.R.-T.)
| | - Giovana Simone Rojas-Torres
- Instituto Politécnico Nacional, Escuela Superior de Ingeniería Química e Industrias Extractivas, Unidad Profesional Adolfo López Mateos, Av. Luis Enrique Erro S/N, Colonia Lindavista 07738, Mexico; (C.Q.H.); (G.S.R.-T.)
| | - María de Jesús Perea-Flores
- Instituto Politécnico Nacional—(Centro de Nanociencias y Micro y Nanotecnologías), Unidad Profesional Adolfo López Mateos, Col. Zacatenco, Mexico City 07738, Mexico; (D.A.-B.); (M.d.J.P.-F.); (H.F.M.-L.)
| | - Héctor Francisco Mendoza-León
- Instituto Politécnico Nacional—(Centro de Nanociencias y Micro y Nanotecnologías), Unidad Profesional Adolfo López Mateos, Col. Zacatenco, Mexico City 07738, Mexico; (D.A.-B.); (M.d.J.P.-F.); (H.F.M.-L.)
| | - Mayra Beatriz Gómez-Patiño
- Instituto Politécnico Nacional—(Centro de Nanociencias y Micro y Nanotecnologías), Unidad Profesional Adolfo López Mateos, Col. Zacatenco, Mexico City 07738, Mexico; (D.A.-B.); (M.d.J.P.-F.); (H.F.M.-L.)
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5
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Huang H, Wang L. Alteration of surface morphologies and chemical composition of cuticle in response to chilling injury in papaya (Carica papaya L.) after harvest. Food Chem 2023; 416:135751. [PMID: 36870151 DOI: 10.1016/j.foodchem.2023.135751] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 01/12/2023] [Accepted: 02/17/2023] [Indexed: 03/02/2023]
Abstract
The alteration of surface microstructures and chemical composition in cuticle of papaya fruit in response to chilling stress were comparatively studied between cultivars of 'Risheng' and 'Suihuang' after harvest. Fruit surface was covered by fissured wax layers in both cultivars. The presence of granule crystalloids was cultivar dependent, with higher abundance in 'Risheng' and lower in 'Suihuang'. Various typical very-long-chain aliphatics i.e., fatty acids, aldehydes, n-alkanes, primary alcohols, and n-alkenes dominated waxes; and cutin monomers were prominently 9/10,16-dihydroxyhexadecanoic acid in papaya fruit cuticle. Chilling pitting symptom was accompanied by modification of granule crystalloids into flat appearance and decreased primary alcohols, fatty acids, and aldehydes in 'Risheng', but no evident changes in 'Suihuang'. The response of cuticle to chilling injury in papaya fruit might be not directly related to the overall amount of waxes and cutin monomers, but more likely to the alteration of appearance morphologies and chemical composition in cuticle.
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Affiliation(s)
- Hua Huang
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, 510640, PR China.
| | - Ling Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China.
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Ji D, Liu W, Jiang L, Chen T. Cuticles and postharvest life of tomato fruit: A rigid cover for aerial epidermis or a multifaceted guard of freshness? Food Chem 2023; 411:135484. [PMID: 36682164 DOI: 10.1016/j.foodchem.2023.135484] [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: 08/04/2022] [Revised: 01/04/2023] [Accepted: 01/11/2023] [Indexed: 01/20/2023]
Abstract
Fruit cuticle is a specialized cell wall hydrophobic architecture covering the aerial surfaces of fruit, which forms the interface between the fruit and its environment. As a specialized seed-bearing organ, fruit utilize cuticles as physical barriers, water permeation regulator and resistance to pathogens, thus appealing extensive research interests for its potential values in developing postharvest freshness-keeping strategies. Here, we provide an overview for the composition and functions of fruit cuticles, mainly focusing on its functions in mechanical support, water permeability barrier and protection over pathogens, further introduce key mechanisms implicated in fruit cuticle biosynthesis. Moreover, currently available state-of-art techniques for examining compositional diversity and architecture of fruit are also compared.
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Affiliation(s)
- Dongchao Ji
- School of Life Sciences and Medicine, Shandong University of Technology, Xincun West Road 266, Zhangdian District, Zibo, Shandong 255049, China; Key Laboratory of Plant Resources, Institute of Botany, Innovative Academy of Seed Design, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Haidian District, Beijing 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19(A), Shijingshan District, Beijing 100049, China
| | - Wei Liu
- Key Laboratory of Plant Resources, Institute of Botany, Innovative Academy of Seed Design, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Haidian District, Beijing 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19(A), Shijingshan District, Beijing 100049, China
| | - Libo Jiang
- School of Life Sciences and Medicine, Shandong University of Technology, Xincun West Road 266, Zhangdian District, Zibo, Shandong 255049, China
| | - Tong Chen
- Key Laboratory of Plant Resources, Institute of Botany, Innovative Academy of Seed Design, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Haidian District, Beijing 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19(A), Shijingshan District, Beijing 100049, China; Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture, Nanxincun 20, Xiangshan, Haidian District, Beijing 100093, China.
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Wan H, Liu Y, Wang T, Jiang P, Wen W, Nie J. Comparative transcriptome and metabolome analysis identifies a citrus ERF transcription factor CsERF003 as flavonoid activator. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 334:111762. [PMID: 37295731 DOI: 10.1016/j.plantsci.2023.111762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/08/2023] [Accepted: 06/06/2023] [Indexed: 06/12/2023]
Abstract
Transcription factor (TF) modulation is a promising strategy for plant flavonoid improvement. Here, we observed evident decreases in some major flavones and flavonols and the expression of some key related genes in a 'Newhall' navel orange mutant (MT) relative to the wild type (WT). A consistently downregulated ERF TF CsERF003 in MT could increase the contents of major flavonoids and the precursor phenylalanine when transiently overexpressed in citrus fruit. Overexpression of CsERF003 in 'Micro-Tom' tomato (OE) resulted in a darker and redder fruit color than wild type 'Micro-Tom' (WTm). Two major flavonoids, naringeninchalcone and kaempferolrutinoside, were averagely induced by 7.99- and 36.83-fold in OEs, respectively, while little change was observed in other polyphenols, such as caffeic acid, ferulic acid, and gallic acid. Key genes involved in the initiation of phenylpropanoid (PAL, 4CH, and 4CL) and flavonoid (CHS and CHI) biosynthesis were up-regulated, while most genes participating in the biosynthesis of other polyphenols, such as HCT and CCR, were down-regulated in OEs. Therefore, it could be concluded that carbon flux floods into the phenylpropanoid biosynthetic pathway and is then specifically directed for flavonoid biosynthesis. CsERF003 may be a potentially promising gene for fruit quality improvement and engineering of natural flavonoid components.
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Affiliation(s)
- Haoliang Wan
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China; National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yihui Liu
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China
| | - Tongtong Wang
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China
| | - Peng Jiang
- Qingdao Agriculture Products Quality and Safety Center, Qingdao, 266035, China
| | - Weiwei Wen
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jiyun Nie
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China.
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8
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Reynoud N, Geneix N, D'Orlando A, Petit J, Mathurin J, Deniset-Besseau A, Marion D, Rothan C, Lahaye M, Bakan B. Cuticle architecture and mechanical properties: a functional relationship delineated through correlated multimodal imaging. THE NEW PHYTOLOGIST 2023; 238:2033-2046. [PMID: 36869436 DOI: 10.1111/nph.18862] [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: 12/19/2022] [Accepted: 02/27/2023] [Indexed: 05/04/2023]
Abstract
Cuticles are multifunctional hydrophobic biocomposites that protect the aerial organs of plants. During plant development, plant cuticles must accommodate different mechanical constraints combining extensibility and stiffness, and the corresponding relationships with their architecture are unknown. Recent data showed a fine-tuning of cuticle architecture during fruit development, with several chemical clusters which raise the question of how they impact the mechanical properties of cuticles. We investigated the in-depth nanomechanical properties of tomato (Solanum lycopersicum) fruit cuticle from early development to ripening, in relation to chemical and structural heterogeneities by developing a correlative multimodal imaging approach. Unprecedented sharps heterogeneities were evidenced including an in-depth mechanical gradient and a 'soft' central furrow that were maintained throughout the plant development despite the overall increase in elastic modulus. In addition, we demonstrated that these local mechanical areas are correlated to chemical and structural gradients. This study shed light on fine-tuning of mechanical properties of cuticles through the modulation of their architecture, providing new insight for our understanding of structure-function relationships of plant cuticles and for the design of bioinspired material.
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Affiliation(s)
- Nicolas Reynoud
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | - Nathalie Geneix
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | - Angelina D'Orlando
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
- INRAE PROBE Research Infrastructure, BIBS Facility, F-44300, Nantes, France
| | - Johann Petit
- INRAE, Univ. Bordeaux, UMR BFP, F-33140, Villenave d'Ornon, France
| | - Jeremie Mathurin
- Institut de Chimie Physique, UMR8000, Université Paris-Saclay, CNRS, 91405, Orsay, France
| | - Ariane Deniset-Besseau
- Institut de Chimie Physique, UMR8000, Université Paris-Saclay, CNRS, 91405, Orsay, France
| | - Didier Marion
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | | | - Marc Lahaye
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | - Bénédicte Bakan
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
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9
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Silva DJS, Santos JAV, Pinto JCN, Llorent-Martínez EJ, Castilho PC, Batista de Carvalho LAE, Marques MPM, Barroca MJ, Moreira da Silva A, da Costa RMF. Spectrochemical analysis of seasonal and sexual variation of antioxidants in Corema album (L.) D. Don leaf extracts. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 299:122816. [PMID: 37192576 DOI: 10.1016/j.saa.2023.122816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/21/2023] [Accepted: 05/01/2023] [Indexed: 05/18/2023]
Abstract
Bioactive phytoconstituents have been increasingly investigated for their potential human health benefits. Corema album (L.) D. Don, an Ericaceae, reportedly has antioxidant, antimicrobial and anticancer properties. Aiming at enhancing its nutraceutical potential, we performed a spectrochemical analysis of hydroethanolic extracts from C. album leaves. We report on changes in the antioxidant activity of the extracts, as well as in the accumulation of key phytoconstituents (namely phenolic compounds), in female and male samples, throughout three harvesting seasons (February, July, and October). For each extract, the antioxidant activity was assessed by different spectrophotometric methods. Simultaneously, attenuated total reflectance Fourier transform mid-infrared spectroscopy (FTIR-ATR), and high-performance liquid chromatography - electrospray ionisation - quadrupole time-of-flight mass spectrometry (HPLC-ESI-Q-TOF-MS), were used to identify and monitor variations in the composition of phenolic compounds in the extracts. The main compounds identified were epicatechin, laricitrin-O-hexoside isomers, and myricetin-O-hexoside isomers. Significant differences were found in the composition and relative abundance of the compounds of interest, according to sex and season. Overall, a trend was observed whereby phenolic content and antioxidant activities were higher in males and increased between the earlier and the latest harvests. Based on these results, we may conclude that late summer or early autumn harvests are preferable when aiming at the highest yearly content of bioactive compounds. Additionally, it should be considered that extracts from male individuals typically display higher antioxidant activities. Ultimately, our understanding of C. album in the context of nutraceutical applications is benefited from the quantitative and qualitative portrait provided here, thus promoting its relevance as a source of bioactive compounds.
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Affiliation(s)
- Daniela J S Silva
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - João A V Santos
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Joana C N Pinto
- CQM - Centro de Química da Madeira, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Eulogio J Llorent-Martínez
- Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, Campus Las Lagunillas, E-23071 Jaén, Spain
| | - Paula C Castilho
- CQM - Centro de Química da Madeira, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Luís A E Batista de Carvalho
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Maria Paula M Marques
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal
| | - Maria João Barroca
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; Polytechnic Institute of Coimbra, Coimbra Agriculture School, 3045-601 Coimbra, Portugal
| | - Aida Moreira da Silva
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; Polytechnic Institute of Coimbra, Coimbra Agriculture School, 3045-601 Coimbra, Portugal
| | - Ricardo M F da Costa
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
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10
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Hamilton K, Rahman T, Sadowski J, Karunakaran C, Tanino K. Identification of ultrastructural and biochemical cuticular markers influencing temperature of ice nucleation in selected genotypes of corn. PHYSIOLOGIA PLANTARUM 2023; 175:e13902. [PMID: 36999192 DOI: 10.1111/ppl.13902] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 02/02/2023] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
Corn is an economically important yet frost-sensitive crop, injured at the moment of ice nucleation. However, the influence of autumn temperatures on subsequent ice nucleation temperature is unknown. A 10-day chilling treatment under phytotron conditions ("mild", 18/6°C) or ("extreme", 10/5°C) generated no-visible damage but induced changes in the cuticle of the four genotypes in this study. The putatively more cold hardy Genotypes 884 and 959 leaves nucleated at colder temperatures compared to the more sensitive Genotypes 675 and 275. After chilling treatment, all four genotypes displayed warmer ice nucleation temperatures, with Genotype 884 expressing the largest shift to warmer nucleation temperatures. Cuticular hydrophobicity reduced while cuticular thickness remained unchanged under the chilling treatment. By contrast, under five-week field conditions, cuticle thickness increased in all genotypes, with Genotype 256 expressing a significantly thinner cuticle. FTIR spectroscopy revealed increases in the spectral regions of cuticular lipids in all genotypes after phytotron chilling treatment, while those spectral regions decreased under field conditions. A total of 142 molecular compounds were detected, with 28 compounds significantly induced under either phytotron or field conditions. Of these, seven compounds were induced under both conditions (Alkanes C31-C33, Ester C44, C46, β-amyrin, and triterpene). While clear differential responses were observed, chilling conditions preceding a frost modified physical and biochemical properties of the leaf cuticle under both phytotron and field conditions indicating this response is dynamic and could be a factor in selecting corn genotypes better adapted to avoiding frost with lower ice nucleation temperature.
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Affiliation(s)
- Kaila Hamilton
- Department of Plant Sciences, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, S7N 5A8
| | - Tawhidur Rahman
- Department of Plant Sciences, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, S7N 5A8
| | - Jason Sadowski
- Department of Plant Sciences, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, S7N 5A8
| | | | - Karen Tanino
- Department of Plant Sciences, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, S7N 5A8
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11
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Rito M, Marques J, da Costa RMF, Correia S, Lopes T, Martin D, Canhoto JMPL, Batista de Carvalho LAE, Marques MPM. Antioxidant Potential of Tamarillo Fruits-Chemical and Infrared Spectroscopy Analysis. Antioxidants (Basel) 2023; 12:antiox12020536. [PMID: 36830094 PMCID: PMC9952541 DOI: 10.3390/antiox12020536] [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: 01/24/2023] [Revised: 02/09/2023] [Accepted: 02/16/2023] [Indexed: 02/23/2023] Open
Abstract
Native to South America, tamarillo (Solanum betaceum Cav.) is a small tree cultivated as a fruit crop in several regions of the world. Known for its sweet and sour taste, tamarillo fruits are very nutritious due to the presence of health-beneficial components such as fiber, vitamins, and antioxidants. Despite its nutritional value, tamarillo remains poorly known in global markets. The present work aims to study the antioxidant activity of four genotypes of tamarillo. Several chemical assays were performed to assess the antioxidant components and antioxidant activity of aqueous ethanolic extracts from each genotype. Overall, the Mealhada genotype (a red cultivar) showed the most interesting results, displaying the highest amount of total phenolic, flavonoids, and anthocyanin contents, as well as higher antioxidant activity. To evaluate the composition of the extract, Fourier-transform infrared spectroscopy (FTIR) was used to characterize important components in aqueous ethanolic extracts of the fruits, having revealed the presence of high amounts of phenols (the main compounds responsible for antioxidant activity), as well as triterpenoids and polysaccharides. The present results highlight the potential nutraceutical importance of tamarillo fruits.
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Affiliation(s)
- Miguel Rito
- Centre for Functional Ecology, Associate Laboratory Terra, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - Joana Marques
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Ricardo M. F. da Costa
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
- Correspondence:
| | - Sandra Correia
- Centre for Functional Ecology, Associate Laboratory Terra, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
- InnovPlantProtect CoLab, Estrada de Gil Vaz, 7351-901 Elvas, Portugal
| | - Tércia Lopes
- Centre for Functional Ecology, Associate Laboratory Terra, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - Daniel Martin
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Jorge M. P. L. Canhoto
- Centre for Functional Ecology, Associate Laboratory Terra, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | | | - Maria Paula M. Marques
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
- Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
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12
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González Moreno A, Domínguez E, Mayer K, Xiao N, Bock P, Heredia A, Gierlinger N. 3D (x-y-t) Raman imaging of tomato fruit cuticle: Microchemistry during development. PLANT PHYSIOLOGY 2023; 191:219-232. [PMID: 35972400 PMCID: PMC9806558 DOI: 10.1093/plphys/kiac369] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/15/2022] [Indexed: 05/20/2023]
Abstract
The cuticle is a protective extracellular matrix that covers the above-ground epidermis of land plants. Here, we studied the cuticle of tomato (Solanum lycopersicum L.) fruits in situ using confocal Raman microscopy. Microsections from cuticles isolated at different developmental stages were scanned to visualize cuticle components with a spatial resolution of 342 nm by univariate and multivariate data analysis. Three main components, cutin, polysaccharides, and aromatics, were identified, with the latter exhibiting the strongest Raman scattering intensity. Phenolic acids and flavonoids were differentiated within the cuticle, and three schematic cuticle models were identified during development. Phenolic acids were found across the entire cuticle at the earliest stage of development, i.e. during the formation of the procuticle layer. Based on a mixture analysis with reference component spectra, the phenolic acids were identified as mainly esterified p-coumaric acid together with free p-hydroxybenzoic acid. During the cell expansion period of growth, phenolic acids accumulated in an outermost layer of the cuticle and in the middle region of the pegs. In these stages of development, cellulose and pectin were detected next to the inner cuticle region, close to the epidermal cell where flavonoid impregnation started during ripening. In the first ripening stage, chalconaringenin was observed, while methoxylated chalcones were chosen by the algorithm to fit the mature cuticle spectra. The colocation of carbohydrates, esterified p-coumaric acid, and methoxylated chalconaringenin suggests that the latter two link polysaccharide and cutin domains. Elucidating the different distribution of aromatics within the cuticle, suggests important functions: (1) overall impregnation conferring mechanical and thermal functions (2) the outermost phenolic acid layer displaying UV-B protection of the plant tissue.
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Affiliation(s)
| | - Eva Domínguez
- IHSM-UMA-CSIC La Mayora, Plant breeding and Biotechnology, CSIC, 29750 Algarrobo-Costa, Málaga, Spain
| | - Konrad Mayer
- Department of Nanobiotechnology, BOKU-University of Natural Resources and Life Science, Vienna, Muthgasse 11, 1190 Vienna, Austria
| | - Nannan Xiao
- Department of Nanobiotechnology, BOKU-University of Natural Resources and Life Science, Vienna, Muthgasse 11, 1190 Vienna, Austria
| | - Peter Bock
- Department of Nanobiotechnology, BOKU-University of Natural Resources and Life Science, Vienna, Muthgasse 11, 1190 Vienna, Austria
| | - Antonio Heredia
- IHSM-UMA-CSIC La Mayora, Departamento de Biología Molecular y Bioquímica, Universidad de Málaga, 29071, Málaga, Spain
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13
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Moyroud E, Airoldi CA, Ferria J, Giorio C, Steimer SS, Rudall PJ, Prychid CJ, Halliwell S, Walker JF, Robinson S, Kalberer M, Glover BJ. Cuticle chemistry drives the development of diffraction gratings on the surface of Hibiscus trionum petals. Curr Biol 2022; 32:5323-5334.e6. [PMID: 36423640 DOI: 10.1016/j.cub.2022.10.065] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 09/07/2022] [Accepted: 10/27/2022] [Indexed: 11/24/2022]
Abstract
Plants combine both chemical and structural means to appear colorful. We now have an extensive understanding of the metabolic pathways used by flowering plants to synthesize pigments, but the mechanisms remain obscure whereby cells produce microscopic structures sufficiently regular to interfere with light and create an optical effect. Here, we combine transgenic approaches in a novel model system, Hibiscus trionum, with chemical analyses of the cuticle, both in transgenic lines and in different species of Hibiscus, to investigate the formation of a semi-ordered diffraction grating on the petal surface. We show that regulating both cuticle production and epidermal cell growth is insufficient to determine the type of cuticular pattern produced. Instead, the chemical composition of the cuticle plays a crucial role in restricting the formation of diffraction gratings to the pigmented region of the petal. This suggests that buckling, driven by spatiotemporal regulation of cuticle chemistry, could pattern the petal surface at the nanoscale.
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Affiliation(s)
- Edwige Moyroud
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK; The Sainsbury Laboratory, University of Cambridge, 47 Bateman Street, Cambridge CB2 1LR, UK; Department of Genetics, University of Cambridge, Downing Street, Cambridge CB2 3EH, UK.
| | - Chiara A Airoldi
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
| | - Jordan Ferria
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
| | - Chiara Giorio
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Sarah S Steimer
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK; Department of Environmental Sciences, University of Basel, Klingelbergstrasse 27, 4056 Basel, Switzerland; Department of Environmental Science, Stockholm University, 106 91 Stockholm, Sweden
| | | | | | - Shannon Halliwell
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
| | - Joseph F Walker
- The Sainsbury Laboratory, University of Cambridge, 47 Bateman Street, Cambridge CB2 1LR, UK
| | - Sarah Robinson
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK; The Sainsbury Laboratory, University of Cambridge, 47 Bateman Street, Cambridge CB2 1LR, UK
| | - Markus Kalberer
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK; Department of Environmental Sciences, University of Basel, Klingelbergstrasse 27, 4056 Basel, Switzerland
| | - Beverley J Glover
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK.
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14
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Reynoud N, Geneix N, Petit J, D’Orlando A, Fanuel M, Marion D, Rothan C, Lahaye M, Bakan B. The cutin polymer matrix undergoes a fine architectural tuning from early tomato fruit development to ripening. PLANT PHYSIOLOGY 2022; 190:1821-1840. [PMID: 36018278 PMCID: PMC9614491 DOI: 10.1093/plphys/kiac392] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/21/2022] [Indexed: 05/20/2023]
Abstract
The cuticle is a complex polymer matrix that protects all aerial organs of plants, fulfills multiple roles in plant-environment interactions, and is critical for plant development. These functions are associated with the structural features of cuticles, and the architectural modeling of cuticles during plant development is crucial for understanding their physical properties and biological functions. In this work, the in-depth architecture of the cutin polymer matrix during fruit development was investigated. Using cherry tomato fruit (Solanum lycopersicum) as a model from the beginning of the cell expansion phase to the red ripe stage, we designed an experimental scheme combining sample pretreatment, Raman mapping, multivariate data analyses, and biochemical analyses. These approaches revealed clear chemical areas with different contributions of cutin, polysaccharides, and phenolics within the cutin polymer matrix. Besides, we demonstrated that these areas are finely tuned during fruit development, including compositional and macromolecular rearrangements. The specific spatiotemporal accumulation of phenolic compounds (p-coumaric acid and flavonoids) suggests that they fulfill distinct functions during fruit development. In addition, we highlighted an unexpected dynamic remodeling of the cutin-embedded polysaccharides pectin, cellulose, and hemicellulose. Such structural tuning enables consistent adaption of the cutin-polysaccharide continuum and the functional performance of the fruit cuticle at the different developmental stages. This study provides insights into the plant cuticle architecture and in particular into the organization of the epidermal cell wall-cuticle.
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Affiliation(s)
- Nicolas Reynoud
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627 44316, Nantes Cedex3, France
| | - Nathalie Geneix
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627 44316, Nantes Cedex3, France
| | - Johann Petit
- INRAE, Univ. Bordeaux, UMR BFP, F-33140, Villenave d’Ornon, France
| | - Angelina D’Orlando
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627 44316, Nantes Cedex3, France
- INRAE PROBE research infrastructure, BIBS Facility, F- 44300, Nantes, France
| | - Mathieu Fanuel
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627 44316, Nantes Cedex3, France
- INRAE PROBE research infrastructure, BIBS Facility, F- 44300, Nantes, France
| | - Didier Marion
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627 44316, Nantes Cedex3, France
| | | | - Marc Lahaye
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627 44316, Nantes Cedex3, France
| | - Bénédicte Bakan
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627 44316, Nantes Cedex3, France
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15
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Wang Y, Zhao Y, Wu Y, Zhao X, Hao Z, Luo H, Yuan Z. Transcriptional profiling of long non-coding RNAs regulating fruit cracking in Punica granatum L. under bagging. FRONTIERS IN PLANT SCIENCE 2022; 13:943547. [PMID: 36304394 PMCID: PMC9592827 DOI: 10.3389/fpls.2022.943547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Fruit cracking tremendously damages the appearance of fruit, easily leads to pathogen invasion, greatly reduces the marketability and causes immense economic losses. The pivotal role of long non-coding RNAs (lncRNAs) in diverse biological processes has been confirmed, while the roles of lncRNAs underlying fruit cracking remain poorly understood. In this study, the incidence of fruit cracking was 7.26% under the bagging treatment, the control group was 38.11%, indicating that bagging considerably diminished the fruit cracking rate. LncRNA libraries for fruit cracking (FC), fruit non-cracking (FNC) and fruit non-cracking under bagging (FB) in pomegranate (Punica granatum L.) were performed and analysed via high-throughput transcriptome sequencing. A total of 3194 lncRNAs were obtained with a total length of 4898846 nt and an average length of 1533.77 nt in pomegranate. We identified 42 differentially expressed lncRNAs (DELs) and 137 differentially expressed mRNAs (DEGs) in FC vs FNC and 35 DELs and 160 DEGs in FB vs FC that formed co-expression networks respectively, suggesting that there are involved in phytohormone signaling pathway, lignin catabolic process, lipid transport/binding, cutin biosynthetic process and cell wall organization. We also found that 18 cis-acting DELs regulated 18 target genes, and 10 trans-acting DELs regulated 24 target genes in FC vs FNC, 23 DELs regulate 23 target genes for the cis-acting lncRNAs and 12 DELs regulated 36 target genes in FB vs FC, which provides an understanding for the regulation of the fruit cracking. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis results demonstrated that DELs participated in calcium ion binding, glycerophospholipid metabolism, flavonoid biosynthetic process, cell wall biogenesis, xyloglucan metabolic process, hormone signal transduction and starch and sucrose metabolism. Our findings provide new insights into the roles of lncRNAs in regulating the fruit cracking and lay the foundation for further improvement of pomegranate quality.
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Affiliation(s)
- Yuying Wang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China
| | - Yujie Zhao
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China
| | - Yaqiong Wu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Xueqing Zhao
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China
| | - Zhaoxiang Hao
- Zaozhuang Pomegranate Research Center, Institute of Botany, Zaozhuang, China
| | - Hua Luo
- Zaozhuang Pomegranate Research Center, Institute of Botany, Zaozhuang, China
| | - Zhaohe Yuan
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China
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16
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Kumachova T, Babosha A, Ryabchenko A. Outer and internal cuticle in the leaves of Malus (Rosaceae) in mountains and plains. Microsc Res Tech 2022; 85:3439-3454. [PMID: 35804489 DOI: 10.1002/jemt.24199] [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: 02/25/2022] [Revised: 06/02/2022] [Accepted: 06/28/2022] [Indexed: 11/07/2022]
Abstract
The outer and internal cuticles in apple (Malus domestica Borkh.) leaves on the plain and in the mountains was studied using transmission electron microscopy (TEM) and confocal laser scanning microscopy (CLSM). The outer cuticle consisted of lamellate and homogeneous layers of the cuticle proper and cuticular layer containing electron-transparent plates and electron-dense dendrites. Blue fluorescence predominated in the cell wall. The cuticle fluoresced green and red. The intensity of the red part of the spectrum in the cuticle increased with altitude, and the number of electron-transparent plates increased within the cuticular layer. The cell wall on both leaf sides was the thinnest in the arid conditions (300 m). At an altitude of 600 m, under favorable temperature and rainfall conditions, the cuticle thickness increased due to the cuticular layer adjacent to the cell wall. The internal cuticle was distinguished by intense yellow or red autofluorescence, similar in color and spectrum to the outer cuticle. The outer and internal cuticles had cuticular folds. The average distance between the ridges of the internal cuticle was almost the same in the samples at different altitudes. The ridge height was maximum at 600 m.
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Affiliation(s)
- Tamara Kumachova
- Moscow Timiryazev Agricultural Academy, Russian State Agrarian University, Moscow, Russia
| | - Alexander Babosha
- N.V. Tsitsin Main Botanical Garden of Russian Academy of Sciences, Moscow, Russia
| | - Andrey Ryabchenko
- N.V. Tsitsin Main Botanical Garden of Russian Academy of Sciences, Moscow, Russia
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17
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Bres C, Petit J, Reynoud N, Brocard L, Marion D, Lahaye M, Bakan B, Rothan C. The SlSHN2 transcription factor contributes to cuticle formation and epidermal patterning in tomato fruit. MOLECULAR HORTICULTURE 2022; 2:14. [PMID: 37789465 PMCID: PMC10515250 DOI: 10.1186/s43897-022-00035-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 05/03/2022] [Indexed: 10/05/2023]
Abstract
Tomato (Solanum lycopersicum) is an established model for studying plant cuticle because of its thick cuticle covering and embedding the epidermal cells of the fruit. In this study, we screened an EMS mutant collection of the miniature tomato cultivar Micro-Tom for fruit cracking mutants and found a mutant displaying a glossy fruit phenotype. By using an established mapping-by-sequencing strategy, we identified the causal mutation in the SlSHN2 transcription factor that is specifically expressed in outer epidermis of growing fruit. The point mutation in the shn2 mutant introduces a K to N amino acid change in the highly conserved 'mm' domain of SHN proteins. The cuticle from shn2 fruit showed a ~ fivefold reduction in cutin while abundance and composition of waxes were barely affected. In addition to alterations in cuticle thickness and properties, epidermal patterning and polysaccharide composition of the cuticle were changed. RNAseq analysis further highlighted the altered expression of hundreds of genes in the fruit exocarp of shn2, including genes associated with cuticle and cell wall formation, hormone signaling and response, and transcriptional regulation. In conclusion, we showed that a point mutation in the transcriptional regulator SlSHN2 causes major changes in fruit cuticle formation and its coordination with epidermal patterning.
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Affiliation(s)
- Cécile Bres
- UMR 1332 BFP, INRAE, Université de Bordeaux, 33140, Villenave d'Ornon, France
| | - Johann Petit
- UMR 1332 BFP, INRAE, Université de Bordeaux, 33140, Villenave d'Ornon, France
| | - Nicolas Reynoud
- Unité Biopolymères, Interactions, Assemblages, INRAE, BP71627, 44316, Nantes Cedex 3, France
| | - Lysiane Brocard
- Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UMS 3420, US 4, 33000, Bordeaux, France
| | - Didier Marion
- Unité Biopolymères, Interactions, Assemblages, INRAE, BP71627, 44316, Nantes Cedex 3, France
| | - Marc Lahaye
- Unité Biopolymères, Interactions, Assemblages, INRAE, BP71627, 44316, Nantes Cedex 3, France
| | - Bénédicte Bakan
- Unité Biopolymères, Interactions, Assemblages, INRAE, BP71627, 44316, Nantes Cedex 3, France
| | - Christophe Rothan
- UMR 1332 BFP, INRAE, Université de Bordeaux, 33140, Villenave d'Ornon, France.
- INRA, UMR 1332 Biologie du Fruit Et Pathologie, 71 Av Edouard Bourlaux, 33140, Villenave d'Ornon, France.
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18
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Huang H, Wang L, Qiu D, Lu Y. Chemical Composition of Cuticle and Barrier Properties to Transpiration in the Fruit of Clausena lansium (Lour.) Skeels. FRONTIERS IN PLANT SCIENCE 2022; 13:840061. [PMID: 35651771 PMCID: PMC9150773 DOI: 10.3389/fpls.2022.840061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/22/2022] [Indexed: 06/15/2023]
Abstract
The plant cuticle, as a lipid membrane covering aerial plant surfaces, functions primarily against uncontrolled water loss. Herein, the cuticle chemical composition and the transpiration of wampee fruit (Clausena lansium (Lour.) Skeels) at the green, turning, and yellow stages in cultivars of "Jixin" and "Tianhuangpi" were comprehensively studied. The coverage of wax and cutin monomers per unit of fruit surface area at the green stage was lower in "Jixin" than in "Tianhuangpi" and increased gradually during development. Cutin monomers accumulated ranging from 22.5 μg cm-2 (green) to 52.5 μg cm-2 (turning) in "Jixin" and from 36.5 μg cm-2 (green) to 81.7 μg cm-2 (yellow) in "Tianhuangpi." The total composition of waxes ranged between 6.0 μg cm-2 (green) and 11.1 μg cm-2 (turning) in "Jixin," while they increased from 7.4 μg cm-2 (green) to 16.7 μg cm-2 (yellow) in "Tianhuangpi." Cutin monomers were dominated by ω-, mid-dihydroxy fatty acids (over 40%), followed by multiple monomers of α,ω-dicarboxylic acids with or without added groups, α-monocarboxylic acids with or without ω- or mid-chain hydroxy or mid-epoxy groups, primary alcohols, and phenolics. The very-long-chain (VLC) aliphatic pattern of cuticular waxes was prominently composed of n-alkanes (ranging from 21.4% to 39.3% of total wax content), fatty acids, primary alcohols, and aldehydes. The cyclic waxes were dominated by triterpenoids (between 23.9 and 51.2%), sterols, and phenolics. Water loss in wampee fruit exhibited linear changes over time, indicating an overall monofunctional barrier to transpiration. Permeance for water in wampee fruit was higher at the green stage than at the yellow stage in both "Jixin" and "Tianhuangpi," which showed a negative correlation with the changes of VLC n-alkanes. The results showed the cuticular chemicals, including cutin monomers and waxes, in wampee fruit and further indicated the potential contributions of the cuticular chemical composition to the physiological functions in fruits.
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Affiliation(s)
- Hua Huang
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Ling Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Products Processing, Guangzhou, China
| | - Diyang Qiu
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Yusheng Lu
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences; Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
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19
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Ray S, Savoie BM, Dudareva N, Morgan JA. Diffusion of volatile organics and water in the epicuticular waxes of petunia petal epidermal cells. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 110:658-672. [PMID: 35106853 DOI: 10.1111/tpj.15693] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 01/07/2022] [Accepted: 01/15/2022] [Indexed: 06/14/2023]
Abstract
Plant cuticles are a mixture of crystalline and amorphous waxes that restrict the exchange of molecules between the plant and the atmosphere. The multicomponent nature of cuticular waxes complicates the study of the relationship between the physical and transport properties. Here, a model cuticle based on the epicuticular waxes of Petunia hybrida flower petals was formulated to test the effect of wax composition on diffusion of water and volatile organic compounds (VOCs). The model cuticle was composed of an n-tetracosane (C24 H50 ), 1-docosanol (C22 H45 OH), and 3-methylbutyl dodecanoate (C17 H34 O2 ), reflecting the relative chain length, functional groups, molecular arrangements, and crystallinity of the natural waxes. Molecular dynamics simulations were performed to obtain diffusion coefficients for compounds moving through waxes of varying composition. Simulated VOC diffusivities of the model system were found to highly correlate with in vitro measurements in isolated petunia cuticles. VOC diffusivity increased up to 30-fold in completely amorphous waxes, indicating a significant effect of crystallinity on cuticular permeability. The crystallinity of the waxes was highly dependent on the elongation of the lattice length and decrease in gap width between crystalline unit cells. Diffusion of water and higher molecular weight VOCs were significantly affected by alterations in crystalline spacing and lengths, whereas the low molecular weight VOCs were less affected. Comparison of measured diffusion coefficients from atomistic simulations and emissions from petunia flowers indicates that the role of the plant cuticle in the VOC emission network is attributed to the differential control on mass transfer of individual VOCs by controlling the composition, amount, and dynamics of scent emission.
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Affiliation(s)
- Shaunak Ray
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907-2100, USA
| | - Brett M Savoie
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907-2100, USA
| | - Natalia Dudareva
- Department of Biochemistry, Purdue University, West Lafayette, IN, 47907-2063, USA
- Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, 47907, USA
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, 47907-2010, USA
| | - John A Morgan
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907-2100, USA
- Department of Biochemistry, Purdue University, West Lafayette, IN, 47907-2063, USA
- Purdue Center for Plant Biology, Purdue University, West Lafayette, IN, 47907, USA
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20
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González Moreno A, de Cózar A, Prieto P, Domínguez E, Heredia A. Radiationless mechanism of UV deactivation by cuticle phenolics in plants. Nat Commun 2022; 13:1786. [PMID: 35379806 PMCID: PMC8979964 DOI: 10.1038/s41467-022-29460-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 03/10/2022] [Indexed: 12/31/2022] Open
Abstract
Hydroxycinnamic acids present in plant cuticles, the interphase and the main protective barrier between the plant and the environment, exhibit singular photochemical properties that could allow them to act as a UV shield. Here, we employ transient absorption spectroscopy on isolated cuticles and leaf epidermises to study in situ the photodynamics of these molecules in the excited state. Based on quantum chemical calculations on p-coumaric acid, the main phenolic acid present in the cuticle, we propose a model in which cuticle phenolics display a photoprotective mechanism based in an ultrafast and non-radiative excited state deactivation combined with fluorescence emission. As such, the cuticle can be regarded as the first and foremost protective barrier against UV radiation. This photostable and photodynamic mechanism seems to be universal in land plants giving a special role and function to the presence of different aromatic domains in plant cuticles and epidermises. Phenolics are abundant in plant cuticles. Here, via transient absorption spectroscopy and quantum chemical calculations, the authors propose a model by which cuticle phenolics provide photoprotection due to ultrafast and non-radiative excited state deactivation combined with fluorescence emission.
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21
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He X, Chavan SG, Hamoui Z, Maier C, Ghannoum O, Chen ZH, Tissue DT, Cazzonelli CI. Smart Glass Film Reduced Ascorbic Acid in Red and Orange Capsicum Fruit Cultivars without Impacting Shelf Life. PLANTS 2022; 11:plants11070985. [PMID: 35406965 PMCID: PMC9003265 DOI: 10.3390/plants11070985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 11/27/2022]
Abstract
Smart Glass Film (SGF) is a glasshouse covering material designed to permit 80% transmission of photosynthetically active light and block heat-generating solar energy. SGF can reduce crop water and nutrient consumption and improve glasshouse energy use efficiency yet can reduce crop yield. The effect of SGF on the postharvest shelf life of fruits remains unknown. Two capsicum varieties, Red (Gina) and Orange (O06614), were cultivated within a glasshouse covered in SGF to assess fruit quality and shelf life during the winter season. SGF reduced cuticle thickness in the Red cultivar (5%) and decreased ascorbic acid in both cultivars (9–14%) without altering the overall morphology of the mature fruits. The ratio of total soluble solids (TSSs) to titratable acidity (TA) was significantly higher in Red (29%) and Orange (89%) cultivars grown under SGF. The Red fruits had a thicker cuticle that reduced water loss and extended shelf life when compared to the Orange fruits, yet neither water loss nor firmness were impacted by SGF. Reducing the storage temperature to 2 °C and increasing relative humidity to 90% extended the shelf life in both cultivars without evidence of chilling injury. In summary, SGF had minimal impact on fruit development and postharvest traits and did not compromise the shelf life of mature fruits. SGF provides a promising technology to block heat-generating solar radiation energy without affecting fruit ripening and marketable quality of capsicum fruits grown during the winter season.
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Affiliation(s)
- Xin He
- National Vegetable Protected Cropping Centre, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; (X.H.); (S.G.C.); (C.M.); (O.G.); (Z.-H.C.); (D.T.T.)
| | - Sachin G. Chavan
- National Vegetable Protected Cropping Centre, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; (X.H.); (S.G.C.); (C.M.); (O.G.); (Z.-H.C.); (D.T.T.)
| | - Ziad Hamoui
- School of Science, Western Sydney University, Penrith, NSW 2751, Australia;
| | - Chelsea Maier
- National Vegetable Protected Cropping Centre, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; (X.H.); (S.G.C.); (C.M.); (O.G.); (Z.-H.C.); (D.T.T.)
| | - Oula Ghannoum
- National Vegetable Protected Cropping Centre, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; (X.H.); (S.G.C.); (C.M.); (O.G.); (Z.-H.C.); (D.T.T.)
| | - Zhong-Hua Chen
- National Vegetable Protected Cropping Centre, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; (X.H.); (S.G.C.); (C.M.); (O.G.); (Z.-H.C.); (D.T.T.)
- School of Science, Western Sydney University, Penrith, NSW 2751, Australia;
| | - David T. Tissue
- National Vegetable Protected Cropping Centre, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; (X.H.); (S.G.C.); (C.M.); (O.G.); (Z.-H.C.); (D.T.T.)
- Global Centre for Land Based Innovation, Western Sydney University, Hawkesbury Campus, Richmond, NSW 2753, Australia
| | - Christopher I. Cazzonelli
- National Vegetable Protected Cropping Centre, Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; (X.H.); (S.G.C.); (C.M.); (O.G.); (Z.-H.C.); (D.T.T.)
- Correspondence: ; Tel.: +61-24-570-1752
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High-value compounds obtained from grape canes (Vitis vinifera L.) by steam pressure alkali extraction. FOOD AND BIOPRODUCTS PROCESSING 2022. [DOI: 10.1016/j.fbp.2022.04.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yang SL, Tran N, Tsai MY, Ho CMK. Misregulation of MYB16 expression causes stomatal cluster formation by disrupting polarity during asymmetric cell divisions. THE PLANT CELL 2022; 34:455-476. [PMID: 34718767 PMCID: PMC8774054 DOI: 10.1093/plcell/koab260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 10/19/2021] [Indexed: 05/02/2023]
Abstract
Stomatal pores and the leaf cuticle regulate evaporation from the plant body and balance the tradeoff between photosynthesis and water loss. MYB16, encoding a transcription factor involved in cutin biosynthesis, is expressed in stomatal lineage ground cells, suggesting a link between cutin biosynthesis and stomatal development. Here, we show that the downregulation of MYB16 in meristemoids is directly mediated by the stomatal master transcription factor SPEECHLESS (SPCH) in Arabidopsis thaliana. The suppression of MYB16 before an asymmetric division is crucial for stomatal patterning, as its overexpression or ectopic expression in meristemoids increased stomatal density and resulted in the formation of stomatal clusters, as well as affecting the outer cell wall structure. Expressing a cutinase gene in plants ectopically expressing MYB16 reduced stomatal clustering, suggesting that cutin affects stomatal signaling or the polarity setup in asymmetrically dividing cells. The clustered stomatal phenotype was rescued by overexpressing EPIDERMAL PATTERNING FACTOR2, suggesting that stomatal signaling was still functional in these plants. Growing seedlings ectopically expressing MYB16 on high-percentage agar plates to modulate tensile strength rescued the polarity and stomatal cluster defects of these seedlings. Therefore, the inhibition of MYB16 expression by SPCH in the early stomatal lineage is required to correctly place the polarity protein needed for stomatal patterning during leaf morphogenesis.
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Affiliation(s)
- Shao-Li Yang
- Institute of Plant and Microbial Biology, Academia Sinica, Nangang, Taipei, Taiwan
| | - Ngan Tran
- Institute of Plant and Microbial Biology, Academia Sinica, Nangang, Taipei, Taiwan
| | - Meng-Ying Tsai
- Institute of Plant and Microbial Biology, Academia Sinica, Nangang, Taipei, Taiwan
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Benítez JJ, González Moreno A, Guzmán-Puyol S, Heredia-Guerrero JA, Heredia A, Domínguez E. The Response of Tomato Fruit Cuticle Membranes Against Heat and Light. FRONTIERS IN PLANT SCIENCE 2022; 12:807723. [PMID: 35069665 PMCID: PMC8777011 DOI: 10.3389/fpls.2021.807723] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/16/2021] [Indexed: 05/29/2023]
Abstract
Two important biophysical properties, the thermal and UV-Vis screening capacity, of isolated tomato fruit cuticle membranes (CM) have been studied by differential scanning calorimetry (DSC) and UV-Vis spectrometry, respectively. A first order melting, corresponding to waxes, and a second order glass transition (T g ) thermal events have been observed. The glass transition was less defined and displaced toward higher temperatures along the fruit ripening. In immature and mature green fruits, the CM was always in the viscous and more fluid state but, in ripe fruits, daily and seasonal temperature fluctuations may cause the transition between the glassy and viscous states altering the mass transfer between the epidermal plant cells and the environment. CM dewaxing reduced the T g value, as derived from the role of waxes as fillers. T g reduction was more intense after polysaccharide removal due to their highly interwoven distribution within the cutin matrix that restricts the chain mobility. Such effect was amplified by the presence of phenolic compounds in ripe cuticle membranes. The structural rigidity induced by phenolics in tomato CMs was directly reflected in their mechanical elastic modulus. The heat capacity (Cp rev ) of cuticle membranes was found to depend on the developmental stage of the fruits and was higher in immature and green stages. The average Cp rev value was above the one of air, which confers heat regulation capacity to CM. Cuticle membranes screened the UV-B light by 99% irrespectively the developmental stage of the fruit. As intra and epicuticular waxes contributed very little to the UV screening, this protection capacity is attributed to the absorption by cinnamic acid derivatives. However, the blocking capacity toward UV-A is mainly due to the CM thickness increment during growth and to the absorption by flavone chalconaringenin accumulated during ripening. The build-up of phenolic compounds was found to be an efficient mechanism to regulate both the thermal and UV screening properties of cuticle membranes.
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Affiliation(s)
- José J. Benítez
- Instituto de Ciencia de Materiales de Sevilla, Centro Mixto Consejo Superior de Investigaciones Científicas-Universidad de Sevilla, Seville, Spain
| | - Ana González Moreno
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Universidad de Málaga, Málaga, Spain
| | - Susana Guzmán-Puyol
- Departamento de Mejora Genética y Biotecnología, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental La Mayora, Málaga, Spain
| | - José A. Heredia-Guerrero
- Departamento de Mejora Genética y Biotecnología, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental La Mayora, Málaga, Spain
| | - Antonio Heredia
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Universidad de Málaga, Málaga, Spain
| | - Eva Domínguez
- Departamento de Mejora Genética y Biotecnología, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental La Mayora, Málaga, Spain
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25
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Simões R, Miranda I, Pereira H. Cutin extraction and composition determined under differing depolymerisation conditions in cork oak leaves. PHYTOCHEMICAL ANALYSIS : PCA 2022; 33:127-135. [PMID: 34155712 DOI: 10.1002/pca.3075] [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: 03/24/2021] [Revised: 06/04/2021] [Accepted: 06/11/2021] [Indexed: 06/13/2023]
Abstract
INTRODUCTION Cutin is a biopolyester involved in waterproofing aerial plant organs, including leaves. Cutin quantification and compositional profiling require depolymerisation, namely by methanolysis, but specific protocols are not available. OBJECTIVES Investigate how different methanolysis conditions regarding catalyst concentration effect cutin depolymerisation and monomer release, to better define protocols for cutin content determination and composition profiling. MATERIAL AND METHODS Cork oak (Quercus suber) dewaxed leaves were reacted with five sodium methoxide (NaOMe) concentrations. Extracts were analysed: glycerol by high-performance liquid chromatography (HPLC) and long-chain lipids by gas chromatography-mass spectrometry (GC-MS). RESULTS Cutin was completely removed by 3% NaOMe (8.4% of dewaxed leaves), while mild 0.1% and 0.01% NaOMe methanolysis only depolymerised 14% of total cutin. Reactivity of cutin ester bonds is not homogeneous and glyceridic ester bonds are more easily cleaved, releasing the existing glycerol already under the mildest conditions (0.53% with 0.01% NaOMe and 0.41% with 3% NaOMe). The composition of cutin extracts varies with depolymerisation extent, with easier release of alkanoic acids and alkanols, respectively, 34.9% and 8.8% of total monomers at 0.1% NaOMe, while ω-hydroxyacids (49.3% of total monomers) and α,ω-diacids (9.0% of the monomers) are solubilised under more intensive reactive conditions. CONCLUSION Cutin of Quercus suber leaves is confirmed as a glyceridic polyester of ω-hydroxyacids and alkanoic acids, with minor content of α,ω-diacids, and including coumarate moieties. The protocol for the determination of cutin content and compositional profiling was established regarding catalyst concentration. The molar composition of cutin suggests a macromolecular assembly based on glycerol linked to lipid oligomeric chains with moderate cross-linking.
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Affiliation(s)
- Rita Simões
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
| | - Isabel Miranda
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
| | - Helena Pereira
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
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Macchioni V, Picchi V, Carbone K. Hop Leaves as an Alternative Source of Health-Active Compounds: Effect of Genotype and Drying Conditions. PLANTS 2021; 11:plants11010099. [PMID: 35009102 PMCID: PMC8747731 DOI: 10.3390/plants11010099] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 11/30/2021] [Accepted: 12/22/2021] [Indexed: 01/15/2023]
Abstract
In hop cultivation, one-third of the crop is a valuable product (hop cones), and two-thirds is unexploited biomass, consisting mainly of leaves and stems, which, in a circular economy approach, can be recovered and, once stabilized, supplied to industrial sectors, such as cosmetics, pharmaceuticals and phytotherapy, with high added value. In this regard, this study aimed to investigate the effects of two different drying methods: oven drying (OD) at 45 °C and freeze-drying (FD), on the overall nutraceutical profile (i.e., total phenols, total flavans and total thiols), pigment content (i.e., carotenoids and chlorophylls) and the antioxidant potential of leaves from five different Humulus lupulus varieties grown in central Italy. Moreover, attenuated total reflectance infrared (ATR-FTIR) spectroscopy was applied to dried leaf powders to study the influence of both the variety and treatment on their molecular fingerprints. The spectral data were then analyzed by principal component analysis (PCA), which was able to group the samples mainly based on the applied treatment. Considering the overall phytochemical profile, FD appeared to be the most suitable drying method, while OD provided higher carotenoid retention, depending on the genotype considered. Finally, unsupervised chemometric tools (i.e., PCA and hierarchical clustering) revealed that the two main clusters contained subclusters based on the drying treatment applied; these subgroups were related to the susceptibility of the variety to the drying conditions studied.
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Affiliation(s)
- Valentina Macchioni
- CREA-Research Centre for Olive, Fruit and Citrus Crops, Via di Fioranello 52, 00134 Rome, Italy;
| | - Valentina Picchi
- CREA-Research Centre for Engineering and Agro-Food Processing, Via G. Venezian 26, 20133 Milan, Italy;
| | - Katya Carbone
- CREA-Research Centre for Olive, Fruit and Citrus Crops, Via di Fioranello 52, 00134 Rome, Italy;
- Correspondence:
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Sagnelli D, Vestri A, Curia S, Taresco V, Santagata G, Johansson MK, Howdle SM. Green enzymatic synthesis and processing of poly (cis-9,10-epoxy-18-hydroxyoctadecanoic acid) in supercritical carbon dioxide (scCO2). Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110827] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Gupta SK, Vishwakarma A, Kenea HD, Galsurker O, Cohen H, Aharoni A, Arazi T. CRISPR/Cas9 mutants of tomato MICRORNA164 genes uncover their functional specialization in development. PLANT PHYSIOLOGY 2021; 187:1636-1652. [PMID: 34618074 PMCID: PMC8566253 DOI: 10.1093/plphys/kiab376] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/15/2021] [Indexed: 05/27/2023]
Abstract
Plant MICRORNA164 (miR164) plays diverse regulatory functions by post-transcriptional repression of certain NAM/ATAF/CUC-domain transcription factors. However, the involvement of miR164 in fleshy fruit development and ripening remains poorly understood. Here, de novo prediction of tomato (Solanum lycopersicum) MIR164 genes identified four genes (SlMIR164a-d), of which SlMIR164d has an atypically long pre-miRNA. The roles of the fruit expressed SlMIR164a, b, and d were studied by analysis of their Clustered Regularly Interspaced Short Palindromic Repeats mutants. The slmir164bCR mutant plants exhibited shoot and flower abnormalities characteristic of ectopic boundary specification, whereas the shoot and flower development of slmir164aCR and slmir164dCR mutants were indistinguishable from wild-type. Strikingly, the knockout of SlMIR164a practically eliminated sly-miR164 from the developing and ripening fruit pericarp. The sly-miR164-deficient slmir164aCR fruits were smaller than the wild-type, due to reduced pericarp cell division and expansion, and displayed intense red color and matte, instead of glossy appearance, upon ripening. We found that the fruit skin phenotypes were associated with morphologically abnormal outer epidermis and thicker cuticle. Quantitation of sly-miR164 target transcripts in slmir164aCR ripening fruits demonstrated the upregulation of SlNAM3 and SlNAM2. Specific expression of their miR164-resistant versions in the pericarp resulted in the formation of extremely small fruits with abnormal epidermis, highlighting the importance of their negative regulation by sly-miR164a. Taken together, our results demonstrate that SlMIR164a and SlMIR164b play specialized roles in development: SlMIR164b is required for shoot and flower boundary specification, and SlMIR164a is required for fruit growth including the expansion of its outer epidermis, which determines the properties of the fruit skin.
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Affiliation(s)
- Suresh Kumar Gupta
- Institute of Plant Sciences, ARO, Volcani Center, Rishon LeZion 7505101, Israel
| | | | - Hawi Deressa Kenea
- Institute of Plant Sciences, ARO, Volcani Center, Rishon LeZion 7505101, Israel
- Department of Plant Science, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Ortal Galsurker
- Institute of Plant Sciences, ARO, Volcani Center, Rishon LeZion 7505101, Israel
| | - Hagai Cohen
- Institute of Plant Sciences, ARO, Volcani Center, Rishon LeZion 7505101, Israel
| | - Asaph Aharoni
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Tzahi Arazi
- Institute of Plant Sciences, ARO, Volcani Center, Rishon LeZion 7505101, Israel
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29
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Si Y, Khanal BP, Schlüter OK, Knoche M. Direct Evidence for a Radial Gradient in Age of the Apple Fruit Cuticle. FRONTIERS IN PLANT SCIENCE 2021; 12:730837. [PMID: 34745165 PMCID: PMC8567170 DOI: 10.3389/fpls.2021.730837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/21/2021] [Indexed: 05/29/2023]
Abstract
The pattern of cuticle deposition plays an important role in managing strain buildup in fruit cuticles. Cuticular strain is the primary trigger for numerous fruit-surface disorders in many fruit crop species. Recent evidence indicates a strain gradient may exist within the apple fruit cuticle. The outer layers of the cuticle are more strained and thus more susceptible to microcracking than the inner layers. A radial gradient in cuticle age is the most likely explanation. Our study aimed to establish whether (or not) deposition of new cutin in a developing apple fruit occurs on the inner surface of the cuticle, i.e., immediately abutting the outward-facing epidermal cell wall. Developing apples were fed with 13C oleic acid through the skin. Following a 14-d period for incorporation, the fruit was harvested and the cuticular membranes (CMs) isolated enzymatically. The CMs were then ablated to varying extents from the inner or the outer surfaces, using a cold atmospheric pressure plasma (CAPP). Afterwards, the ablated CMs were dewaxed and the 13C contents were determined by mass spectrometry. The incorporation of 13C in the cutin fraction was higher than in the wax fraction. The 13C content was highest in non-ablated, dewaxed CM (DCM) and decreased as ablation depth from the inner surface increased. There was no change in 13C content when ablation was carried out from the outer surface. As fruit development proceeded, more 13C label was found towards the middle of the DCM. These results offered direct evidence for deposition of cutin being on the inner surface of the cuticle, resulting in a radial gradient in cuticular age-the most recent deposition (youngest) being on the inner cuticle surface (abutting the epidermal cell wall) and the earliest deposition (oldest) being on the outer surface (abutting the atmosphere).
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Affiliation(s)
- Yiru Si
- Fruit Science Section, Institute of Horticultural Production Systems, Leibniz University Hannover, Hannover, Germany
| | - Bishnu P. Khanal
- Fruit Science Section, Institute of Horticultural Production Systems, Leibniz University Hannover, Hannover, Germany
| | - Oliver K. Schlüter
- Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Potsdam, Germany
| | - Moritz Knoche
- Fruit Science Section, Institute of Horticultural Production Systems, Leibniz University Hannover, Hannover, Germany
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Vega C, Valbuena-Carabaña M, Gil L, Fernández V. Water Sorption and Desorption of Isolated Cuticles From Three Woody Species With Focus on Ilex aquifolium. FRONTIERS IN PLANT SCIENCE 2021; 12:728627. [PMID: 34671373 PMCID: PMC8522496 DOI: 10.3389/fpls.2021.728627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
The cuticle is a lipid-rich layer that protects aerial plant organs against multiple stress factors such as dehydration. In this study, cuticle composition and structure in relation to water loss are examined in a broad ecophysiological context, taking into consideration leaf age and side from Ilex aquifolium (holly) in comparison with Eucalyptus globulus (eucalypt) and Prunus laurocerasus (cherry laurel). Enzymatically isolated cuticular membranes from holly leaves were studied under three treatment conditions: natural (no chemical treatment), after dewaxing, and after methanolysis, and the rate of water loss was assessed. Structural and chemical changes were evaluated using different microscopy techniques and by Fourier transform infrared (FTIR) spectroscopy. The potential mechanisms of solute absorption by holly leaves were additionally evaluated, also testing if its prickly leaf margin may facilitate uptake. The results indicate that the treatment conditions led to structural changes, and that chemical composition was hardly affected because of the occurrence of cutan. Structural changes led to more hydrophilic adaxial surfaces, which retained more water and were more efficient than natural cuticles, while changes were not significant for abaxial surfaces. Across natural cuticles, age was a significant factor for eucalypt but not for holly. Young eucalypt cuticles were the group that absorbed more water and had the lowest water loss rate. When comparing older leaf cuticles of the three species, cherry laurel was found to absorb more water, which was, however, lost more slowly, compared with the other species. Evidence was gained that holly leaves can absorb foliar-applied solutes (traced after calcium chloride application) through the adaxial and abaxial surfaces, the adaxial mid veins, and to a lower extent, the spines. In conclusion, for the species examined, the results show variations in leaf cuticle composition and structure in relation to leaf ontogeny, and water sorption and desorption capacity.
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31
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Hood C, Laredo T, Marangoni AG, Pensini E. Water‐repellent
films from corn protein and tomato cutin. J Appl Polym Sci 2021. [DOI: 10.1002/app.50831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Christine Hood
- School of Engineering University of Guelph Guelph Ontario Canada
| | - Thamara Laredo
- Departments of Sustainability Sciences and Chemistry Lakehead University Orillia Ontario Canada
| | | | - Erica Pensini
- School of Engineering University of Guelph Guelph Ontario Canada
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Marques J, Martin D, Amado AM, Lysenko V, Osório N, Batista de Carvalho LAE, Marques MPM, Barroca MJ, Moreira da Silva A. Novel Insights into Corema album Berries: Vibrational Profile and Biological Activity. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10091761. [PMID: 34579295 PMCID: PMC8470319 DOI: 10.3390/plants10091761] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/18/2021] [Accepted: 08/21/2021] [Indexed: 05/04/2023]
Abstract
This study reports an evaluation of the biological properties of the edible berries from Corema album, an endemic shrub of the Portuguese coastline, aiming at its use as a nutraceutical. Different methanolic extracts were obtained from the pulp and seed of fresh berries: pulp extract, seed residue, and seed oil (extracted and characterized for the first time). For each of these, the antioxidant activity was assessed, by different methods, as well as the antimicrobial ability. Overall, the seeds were shown to be the most nutraceutical part of the berry since they showed higher antioxidant activity, while the pulp extract displayed a significant antimicrobial capacity against several clinically relevant bacterial strains. Furthermore, the extracts were fully characterized by complementary infrared and Raman spectroscopy, revealing the presence of phenolic acids, polysaccharides, sugars, and triterpenoids in the pulp, high content of unsaturated fatty acids in the seed oil, and significant amounts of phenolics and carotenoids in the seed residue. These results pave the way for a reliable correlation between chemical composition and biological activity, in edible fruit samples.
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Affiliation(s)
- Joana Marques
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
- Correspondence:
| | - Daniel Martin
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
| | - Ana M. Amado
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
| | - Viktoriya Lysenko
- College of Health Technology of Coimbra, Polytechnic Institute of Coimbra, S. Martinho do Bispo, 3046-854 Coimbra, Portugal;
| | - Nádia Osório
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
- College of Health Technology of Coimbra, Polytechnic Institute of Coimbra, S. Martinho do Bispo, 3046-854 Coimbra, Portugal;
| | - Luís A. E. Batista de Carvalho
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
| | - Maria Paula M. Marques
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
- Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal
| | - Maria João Barroca
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
- Polytechnic of Coimbra, Coimbra Agriculture School, Bencanta, 3045-601 Coimbra, Portugal
| | - Aida Moreira da Silva
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (D.M.); (A.M.A.); (N.O.); (L.A.E.B.d.C.); (M.P.M.M.); (M.J.B.); (A.M.d.S.)
- Polytechnic of Coimbra, Coimbra Agriculture School, Bencanta, 3045-601 Coimbra, Portugal
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González Moreno A, Prieto P, Ruiz Delgado MC, Domínguez E, Heredia A, de Cózar A. Structure, isomerization and dimerization processes of naringenin flavonoids. Phys Chem Chem Phys 2021; 23:18068-18077. [PMID: 34388230 DOI: 10.1039/d1cp01161h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In this study, the theoretical and experimental results on the molecular structure and reactivity of the plant flavonoids naringenin chalcone and naringenin are reported. UV-vis and Raman spectra were recorded and their main bands have been assigned theoretically. Moreover, the analysis of the naringenin chalcone-naringenin cyclization-isomerization reaction and the formation of homodimers and heterodimers have been performed within a DFT framework. The presence of H-bonded water networks is mandatory to make the cyclization energetically suitable, suggesting that this equilibrium will occur in an aqueous intracellular environment rather than in the extracellular and hydrophobic plant cuticles. Additionally, the preferential formation of homodimers stabilized by π-π stacking that will interact with other dimers by H-bonding over the formation of naringenin chalcone-naringenin heterodimers is also proposed in a hydrophobic environment. These results give a plausible model to explain how flavonoids are located within the cuticle molecular arrangement.
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Affiliation(s)
- Ana González Moreno
- IHSM-UMA-CSIC La Mayora, Departamento de Biología Molecular y Bioquímica, Universidad de Málaga (UMA), 29071, Málaga, Spain.
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Assessing the Potential of the Terrestrial Cyanobacterium Anabaena minutissima for Controlling Botrytis cinerea on Tomato Fruits. HORTICULTURAE 2021. [DOI: 10.3390/horticulturae7080210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cyanobacteria are oxygenic phototrophs that have an essential role in soil N2 fixation, fertility, and water retention. Cyanobacteria are also natural sources of bioactive metabolites beneficial to improve plant vigor and potentially active against fungal plant pathogens. Therefore, we studied the antifungal activity of water extract (WE) and phycobiliproteins (PBPs) from Anabaena minutissima strain BEA 0300B against the fungal plant pathogen Botrytis cinerea on tomato fruits and in vitro. The water extract and PBPs were characterized by using FT-IR and FT-Raman spectroscopies. Both water extract (5 mg/mL) and PBPs (ranged from 0.3 to 4.8 mg/mL) reduced disease incidence and disease severity on tomato fruits and mycelium growth and colony forming units in vitro. For mycelium growth, a linear PBP dose-response was found. Tomato fruits were also characterized by FT-IR and FT-Raman spectroscopies in order to evaluate structural modifications induced by pathogen and PBP treatment. PBPs preserved cutin and pectin structures by pathogen challenge. In conclusion, A. minutissima can be considered a potential tool for future large-scale experiments for plant disease control.
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Quero-García J, Letourmy P, Campoy JA, Branchereau C, Malchev S, Barreneche T, Dirlewanger E. Multi-year analyses on three populations reveal the first stable QTLs for tolerance to rain-induced fruit cracking in sweet cherry (Prunus avium L.). HORTICULTURE RESEARCH 2021; 8:136. [PMID: 34059661 PMCID: PMC8166915 DOI: 10.1038/s41438-021-00571-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 04/16/2021] [Accepted: 04/26/2021] [Indexed: 06/01/2023]
Abstract
Rain-induced fruit cracking is a major problem in sweet cherry cultivation. Basic research has been conducted to disentangle the physiological and mechanistic bases of this complex phenomenon, whereas genetic studies have lagged behind. The objective of this work was to disentangle the genetic determinism of rain-induced fruit cracking. We hypothesized that a large genetic variation would be revealed, by visual field observations conducted on mapping populations derived from well-contrasted cultivars for cracking tolerance. Three populations were evaluated over 7-8 years by estimating the proportion of cracked fruits for each genotype at maturity, at three different areas of the sweet cherry fruit: pistillar end, stem end, and fruit side. An original approach was adopted to integrate, within simple linear models, covariates potentially related to cracking, such as rainfall accumulation before harvest, fruit weight, and firmness. We found the first stable quantitative trait loci (QTLs) for cherry fruit cracking, explaining percentages of phenotypic variance above 20%, for each of these three types of cracking tolerance, in different linkage groups, confirming the high complexity of this trait. For these and other QTLs, further analyses suggested the existence of at least two-linked QTLs in each linkage group, some of which showed confidence intervals close to 5 cM. These promising results open the possibility of developing marker-assisted selection strategies to select cracking-tolerant sweet cherry cultivars. Further studies are needed to confirm the stability of the reported QTLs over different genetic backgrounds and environments and to narrow down the QTL confidence intervals, allowing the exploration of underlying candidate genes.
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Affiliation(s)
- José Quero-García
- INRAE, Biologie du Fruit et Pathologie, Université de Bordeaux, UMR 1332, F-33140, Villenave d'Ornon, France.
| | - Philippe Letourmy
- CIRAD, UPR AIDA, University of Montpellier, TA B-115/02, Avenue Agropolis, 34398, Montpellier Cedex 5, France
| | - José Antonio Campoy
- Department of Chromosome Biology, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg, 50289, Cologne, Germany
| | - Camille Branchereau
- INRAE, Biologie du Fruit et Pathologie, Université de Bordeaux, UMR 1332, F-33140, Villenave d'Ornon, France
| | - Svetoslav Malchev
- Fruit Growing Institute - Plovdiv, 12 Ostromila Str., 4004, Plovdiv, Bulgaria
| | - Teresa Barreneche
- INRAE, Biologie du Fruit et Pathologie, Université de Bordeaux, UMR 1332, F-33140, Villenave d'Ornon, France
| | - Elisabeth Dirlewanger
- INRAE, Biologie du Fruit et Pathologie, Université de Bordeaux, UMR 1332, F-33140, Villenave d'Ornon, France
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Martin D, Lopes T, Correia S, Canhoto J, Marques MPM, Batista de Carvalho LAE. Nutraceutical properties of tamarillo fruits: A vibrational study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 252:119501. [PMID: 33571737 DOI: 10.1016/j.saa.2021.119501] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 12/30/2020] [Accepted: 01/14/2021] [Indexed: 05/21/2023]
Abstract
Tamarillo (tree tomato) is a subtropical tree that produces edible fruits with health-beneficial properties, since it contains several components with potential therapeutic and chemoprotective activity. The present work reports the first complete vibrational study (Raman and infrared) of this edible fruit. This approach allowed us to determine where the most relevant nutraceutical compounds are located in the fruit, as well as their relative amounts. Particular vibrational signatures were obtained for each part of the fruit, reporting different components for the epicarp (outer and inner sections), the pulp and the seeds, especially regarding the content in phenolic compounds, unsaturated fatty acids/esters and polymeric chains from the cuticular wax. Valuable information, at the molecular level was gathered regarding the nutricional value of tamarillo's fruit, for its different fractions. This is expected to pave the way for its introduction as a promising nutraceutical, based on the potential therapeutic properties of its main components.
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Affiliation(s)
- Daniel Martin
- University of Coimbra, Molecular Physical-Chemistry R&D Unit, Department of Chemistry, 3004-535 Coimbra, Portugal.
| | - Tércia Lopes
- University of Coimbra, Centre for Functional Ecology, Deparment of Life Sciences, 3000-456 Coimbra, Portugal
| | - Sandra Correia
- University of Coimbra, Centre for Functional Ecology, Deparment of Life Sciences, 3000-456 Coimbra, Portugal
| | - Jorge Canhoto
- University of Coimbra, Centre for Functional Ecology, Deparment of Life Sciences, 3000-456 Coimbra, Portugal
| | - Maria Paula M Marques
- University of Coimbra, Molecular Physical-Chemistry R&D Unit, Department of Chemistry, 3004-535 Coimbra, Portugal; University of Coimbra, Department of Life Sciences, 3000-456 Coimbra, Portugal
| | - Luís A E Batista de Carvalho
- University of Coimbra, Molecular Physical-Chemistry R&D Unit, Department of Chemistry, 3004-535 Coimbra, Portugal
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37
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Barraj Barraj R, Segado P, Moreno-González R, Heredia A, Fernández-Muñoz R, Domínguez E. Genome-wide QTL analysis of tomato fruit cuticle deposition and composition. HORTICULTURE RESEARCH 2021; 8:113. [PMID: 33931622 PMCID: PMC8087829 DOI: 10.1038/s41438-021-00548-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 03/22/2021] [Accepted: 04/01/2021] [Indexed: 05/24/2023]
Abstract
Genetics of traits related to fruit cuticle deposition and composition was studied in two red-fruited tomato species. Two mapping populations derived from the cross between the cultivated tomato (Solanum lycopersicum L.) and its closest relative wild species Solanum pimpinellifolium L. were employed to conduct a QTL analysis. A combination of fruit cuticle deposition, components and anatomical traits were investigated and the individual effect of each QTL evaluated. A total of 70 QTLs were identified, indicating that all the cuticle traits analyzed have a complex polygenic nature. A combination of additive and epistatic interactions was observed for all the traits, with positive contribution of both parental lines to most of them. Colocalization of QTLs for various traits uncovered novel genomic regions producing extensive changes in the cuticle. Cuticle density emerges as an important trait since it can modulate cuticle thickness and invagination thus providing a strategy for sustaining mechanical strength without compromising palatability. Two genomic regions, located in chromosomes 1 and 12, are responsible for the negative interaction between cuticle waxes and phenolics identified in tomato fruit. Several candidate genes, including transcription factors and structural genes, are postulated and their expression analyzed throughout development.
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Affiliation(s)
- Rida Barraj Barraj
- Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Departamento de Mejora Genética y Biotecnología, Estación Experimental La Mayora, Algarrobo-Costa, E-29750, Málaga, Spain
| | - Patricia Segado
- Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Departamento de Biología Molecular y Bioquímica, Universidad de Málaga, E-29071, Málaga, Spain
| | - Rocío Moreno-González
- Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Departamento de Biología Molecular y Bioquímica, Universidad de Málaga, E-29071, Málaga, Spain
- Departament de Bioquímica i Fisiologia and Institut de Recerca en Nutrició i Seguretat Alimentària (INSA-UB), Universitat de Barcelona (UB), E-08028, Barcelona, Spain
| | - Antonio Heredia
- Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Departamento de Biología Molecular y Bioquímica, Universidad de Málaga, E-29071, Málaga, Spain
| | - Rafael Fernández-Muñoz
- Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Departamento de Mejora Genética y Biotecnología, Estación Experimental La Mayora, Algarrobo-Costa, E-29750, Málaga, Spain
| | - Eva Domínguez
- Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Departamento de Mejora Genética y Biotecnología, Estación Experimental La Mayora, Algarrobo-Costa, E-29750, Málaga, Spain.
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Xin A, Fei Y, Molnar A, Fry SC. Cutin:cutin-acid endo-transacylase (CCT), a cuticle-remodelling enzyme activity in the plant epidermis. Biochem J 2021; 478:777-798. [PMID: 33511979 PMCID: PMC7925011 DOI: 10.1042/bcj20200835] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/17/2021] [Accepted: 01/28/2021] [Indexed: 01/08/2023]
Abstract
Cutin is a polyester matrix mainly composed of hydroxy-fatty acids that occurs in the cuticles of shoots and root-caps. The cuticle, of which cutin is a major component, protects the plant from biotic and abiotic stresses, and cutin has been postulated to constrain organ expansion. We propose that, to allow cutin restructuring, ester bonds in this net-like polymer can be transiently cleaved and then re-formed (transacylation). Here, using pea epicotyl epidermis as the main model, we first detected a cutin:cutin-fatty acid endo-transacylase (CCT) activity. In-situ assays used endogenous cutin as the donor substrate for endogenous enzymes; the exogenous acceptor substrate was a radiolabelled monomeric cutin-acid, 16-hydroxy-[3H]hexadecanoic acid (HHA). High-molecular-weight cutin became ester-bonded to intact [3H]HHA molecules, which thereby became unextractable except by ester-hydrolysing alkalis. In-situ CCT activity correlated with growth rate in Hylotelephium leaves and tomato fruits, suggesting a role in loosening the outer epidermal wall during organ growth. The only well-defined cutin transacylase in the apoplast, CUS1 (a tomato cutin synthase), when produced in transgenic tobacco, lacked CCT activity. This finding provides a reference for future CCT protein identification, which can adopt our sensitive enzyme assay to screen other CUS1-related enzymes.
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Affiliation(s)
- Anzhou Xin
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, The University of Edinburgh, Edinburgh EH9 3BF, U.K
| | - Yue Fei
- Institute of Molecular Plant Sciences, The University of Edinburgh, Edinburgh EH9 3BF, U.K
| | - Attila Molnar
- Institute of Molecular Plant Sciences, The University of Edinburgh, Edinburgh EH9 3BF, U.K
| | - Stephen C. Fry
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, The University of Edinburgh, Edinburgh EH9 3BF, U.K
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Benítez JJ, Guzmán-Puyol S, Vilaplana F, Heredia-Guerrero JA, Domínguez E, Heredia A. Mechanical Performances of Isolated Cuticles Along Tomato Fruit Growth and Ripening. FRONTIERS IN PLANT SCIENCE 2021; 12:787839. [PMID: 34975973 PMCID: PMC8718444 DOI: 10.3389/fpls.2021.787839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 11/25/2021] [Indexed: 05/08/2023]
Abstract
The cuticle is the most external layer that protects fruits from the environment and constitutes the first shield against physical impacts. The preservation of its mechanical integrity is essential to avoid the access to epidermal cell walls and to prevent mass loss and damage that affect the commercial quality of fruits. The rheology of the cuticle is also very important to respond to the size modification along fruit growth and to regulate the diffusion of molecules from and toward the atmosphere. The mechanical performance of cuticles is regulated by the amount and assembly of its components (mainly cutin, polysaccharides, and waxes). In tomato fruit cuticles, phenolics, a minor cuticle component, have been found to have a strong influence on their mechanical behavior. To fully characterize the biomechanics of tomato fruit cuticle, transient creep, uniaxial tests, and multi strain dynamic mechanical analysis (DMA) measurements have been carried out. Two well-differentiated stages have been identified. At early stages of growth, characterized by a low phenolic content, the cuticle displays a soft elastic behavior. Upon increased phenolic accumulation during ripening, a progressive stiffening is observed. The increment of viscoelasticity in ripe fruit cuticles has also been associated with the presence of these compounds. The transition from the soft elastic to the more rigid viscoelastic regime can be explained by the cooperative association of phenolics with both the cutin and the polysaccharide fractions.
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Affiliation(s)
- José J. Benítez
- Instituto de Ciencia de Materiales de Sevilla, Centro Mixto Consejo Superior de Investigaciones Científicas-Universidad de Sevilla, Seville, Spain
- *Correspondence: José J. Benítez,
| | - Susana Guzmán-Puyol
- Departamento de Mejora Genética y Biotecnología, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental La Mayora, Málaga, Spain
| | - Francisco Vilaplana
- Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - José A. Heredia-Guerrero
- Departamento de Mejora Genética y Biotecnología, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental La Mayora, Málaga, Spain
| | - Eva Domínguez
- Departamento de Mejora Genética y Biotecnología, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Estación Experimental La Mayora, Málaga, Spain
| | - Antonio Heredia
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas, Universidad de Málaga, Málaga, Spain
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40
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Reynoud N, Petit J, Bres C, Lahaye M, Rothan C, Marion D, Bakan B. The Complex Architecture of Plant Cuticles and Its Relation to Multiple Biological Functions. FRONTIERS IN PLANT SCIENCE 2021; 12:782773. [PMID: 34956280 PMCID: PMC8702516 DOI: 10.3389/fpls.2021.782773] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 11/18/2021] [Indexed: 05/20/2023]
Abstract
Terrestrialization of vascular plants, i.e., Angiosperm, is associated with the development of cuticular barriers that prevent biotic and abiotic stresses and support plant growth and development. To fulfill these multiple functions, cuticles have developed a unique supramolecular and dynamic assembly of molecules and macromolecules. Plant cuticles are not only an assembly of lipid compounds, i.e., waxes and cutin polyester, as generally presented in the literature, but also of polysaccharides and phenolic compounds, each fulfilling a role dependent on the presence of the others. This mini-review is focused on recent developments and hypotheses on cuticle architecture-function relationships through the prism of non-lipid components, i.e., cuticle-embedded polysaccharides and polyester-bound phenolics.
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Affiliation(s)
- Nicolas Reynoud
- INRAE, Unité Biopolymères, Interactions, Assemblages, Nantes, France
| | - Johann Petit
- INRAE, University of Bordeaux, UMR BFP, Villenave d’Ornon, France
| | - Cécile Bres
- INRAE, University of Bordeaux, UMR BFP, Villenave d’Ornon, France
| | - Marc Lahaye
- INRAE, Unité Biopolymères, Interactions, Assemblages, Nantes, France
| | | | - Didier Marion
- INRAE, Unité Biopolymères, Interactions, Assemblages, Nantes, France
| | - Bénédicte Bakan
- INRAE, Unité Biopolymères, Interactions, Assemblages, Nantes, France
- *Correspondence: Bénédicte Bakan,
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Simões R, Miranda I, Pereira H. Chemical composition of leaf cutin in six Quercus suber provenances. PHYTOCHEMISTRY 2021; 181:112570. [PMID: 33166753 DOI: 10.1016/j.phytochem.2020.112570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
The cutin content and composition of cork oak (Quercus suber) leaves was determined in six provenances with different seed geographical origin spreading across the species natural distribution. The cutin layer on the leaf surface was on average 518 μg/cm2 of leaf area and represented 6.7% of the leaf dry weight, with no significant differences among provenances. Cutin depolymerisation was carried out by transesterification on whole leaves. The cutin composition of cork oak leaves is presented here for the first time. It is essentially composed of long-chain aliphatic ω-hydroxy fatty acids (44.4% of the total monomers), mostly with mid-chain hydroxyl and epoxy groups, fatty acids (20.7%), and a smaller proportion of α,ω-dicarboxylic acids (6.5%). The predominant compounds are 10,16-dihydroxy hexadecanoic acid (17.7-25.2%) and 9,10,18-trihydroxyoctadecanoic acid (15.6-18.0%). Alkanols represent 2.8% and aromatic compounds 12.8%, mainly coumarates. Isolation of cuticles from Q. suber leaves was performed using an enzymatic separation procedure and the fragments were analysed. Cuticle isolation is difficult and direct depolymerisation applied to whole leaves proved a suitable method to study cutin monomeric composition, which did not differ substantially to that of the isolated cuticles. No differences between provenances were found regarding cutin content and composition, thereby ruling out a significant genetic determination of these traits, but rather a highly adaptive phenotypic plasticity of cork oak. Although overall similar in their chemical nature, cutin and suberin in cork oak differ in the proportion of the major chemical families, i.e. ω-hydroxy acids, α,ω-diacids, and fatty acids.
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Affiliation(s)
- Rita Simões
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal
| | - Isabel Miranda
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal.
| | - Helena Pereira
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisboa, Portugal
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Arrieta-Baez D, Perea Flores MDJ, Méndez-Méndez JV, Mendoza León HF, Gómez-Patiño MB. Structural Studies of the Cutin from Two Apple Varieties: Golden Delicious and Red Delicious ( Malus domestica). MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25245955. [PMID: 33339233 PMCID: PMC7767305 DOI: 10.3390/molecules25245955] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/10/2020] [Accepted: 12/14/2020] [Indexed: 11/26/2022]
Abstract
The cuticle, a protective cuticular barrier present in almost all primary aerial plant organs, has a composition that varies between plant species. As a part of the apple peel, cuticle and epicuticular waxes have an important role in the skin appearance and quality characteristic in fresh fruits destined for human consumption. The specific composition and structural characteristics of cutin from two apple varieties, “golden delicious” and “red delicious”, were obtained by enzymatic protocols and studied by means of cross polarization magic angle spinning nuclear magnetic resonance (CP-MAS 13C NMR), attenuated total reflection infrared spectroscopy (ATR-FTIR), and mass spectrometry, and were morphologically characterized by specialized microscopy techniques (atomic force microscopy (AFM), confocal laser scanning microscopy (CLMS), and scanning electron microscopy (SEM)). According to CP-MAS 13C NMR and ATR-FTIR analysis, cutins from both varieties are mainly composed of aliphatics and a small difference is shown between them. This was corroborated from the hydrolyzed cutins analysis by mass spectrometry, where 9,10,18-trihydroxy-octadecanoic acid; 10,20-Dihydroxy-icosanoic acid; 10,16-dihydroxy hexadecenoic acid (10,16-DHPA); 9,10-epoxy-12-octadecenoic acid; and 9,10-epoxy-18-hydroxy-12-octadecenoic acid were the main monomers isolated. The low presence of polysaccharides and phenolics in the cutins obtained could be related to the low elastic behavior of this biocomposite and the presence of cracks in the apple cutin’s surface. These cracks have an average depth of 1.57 µm ± 0.57 in the golden apple, and 1.77 µm ± 0.64 in those found in the red apple. The results obtained in this work may facilitate a better understanding that mechanical properties of the apple fruit skin are mainly related to the specific aliphatic composition of cutin and help to much better investigate the formation of microcracks, an important symptom of russet formation.
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Presentato A, Piacenza E, Scurria A, Albanese L, Zabini F, Meneguzzo F, Nuzzo D, Pagliaro M, Martino DC, Alduina R, Ciriminna R. A New Water-Soluble Bactericidal Agent for the Treatment of Infections Caused by Gram-Positive and Gram-Negative Bacterial Strains. Antibiotics (Basel) 2020; 9:antibiotics9090586. [PMID: 32911640 PMCID: PMC7558503 DOI: 10.3390/antibiotics9090586] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 08/27/2020] [Accepted: 09/07/2020] [Indexed: 01/31/2023] Open
Abstract
Grapefruit and lemon pectin obtained from the respective waste citrus peels via hydrodynamic cavitation in water only are powerful, broad-scope antimicrobials against Gram-negative and -positive bacteria. Dubbed IntegroPectin, these pectic polymers functionalized with citrus flavonoids and terpenes show superior antimicrobial activity when compared to commercial citrus pectin. Similar to commercial pectin, lemon IntegroPectin determined ca. 3-log reduction in Staphylococcus aureus cells, while an enhanced activity of commercial citrus pectin was detected in the case of Pseudomonas aeruginosa cells with a minimal bactericidal concentration (MBC) of 15 mg mL−1. Although grapefruit and lemon IntegroPectin share equal MBC in the case of P. aeruginosa cells, grapefruit IntegroPectin shows boosted activity upon exposure of S. aureus cells with a 40 mg mL−1 biopolymer concentration affording complete killing of the bacterial cells. Insights into the mechanism of action of these biocompatible antimicrobials and their effect on bacterial cells, at the morphological level, were obtained indirectly through Fourier Transform Infrared spectroscopy and directly through scanning electron microscopy. In the era of antimicrobial resistance, these results are of great societal and sanitary relevance since citrus IntegroPectin biomaterials are also devoid of cytotoxic activity, as already shown for lemon IntegroPectin, opening the route to the development of new medical treatments of polymicrobial infections unlikely to develop drug resistance.
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Affiliation(s)
- Alessandro Presentato
- Department of Biological, Chemical, and Pharmaceutical Science and Technology (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (A.P.); (E.P.); (D.C.M.)
| | - Elena Piacenza
- Department of Biological, Chemical, and Pharmaceutical Science and Technology (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (A.P.); (E.P.); (D.C.M.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Firenze, Italy
| | - Antonino Scurria
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via U. La Malfa 153, 90146 Palermo, Italy; (A.S.); (R.C.)
| | - Lorenzo Albanese
- Istituto per la Bioeconomia, CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy; (L.A.); (F.Z.); (F.M.)
| | - Federica Zabini
- Istituto per la Bioeconomia, CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy; (L.A.); (F.Z.); (F.M.)
| | - Francesco Meneguzzo
- Istituto per la Bioeconomia, CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy; (L.A.); (F.Z.); (F.M.)
| | - Domenico Nuzzo
- Istituto per la Ricerca e l’Innovazione Biomedica, CNR, via U. La Malfa 153, 90146 Palermo, Italy;
| | - Mario Pagliaro
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via U. La Malfa 153, 90146 Palermo, Italy; (A.S.); (R.C.)
- Correspondence: (M.P.); (R.A.)
| | - Delia Chillura Martino
- Department of Biological, Chemical, and Pharmaceutical Science and Technology (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (A.P.); (E.P.); (D.C.M.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Firenze, Italy
| | - Rosa Alduina
- Department of Biological, Chemical, and Pharmaceutical Science and Technology (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy; (A.P.); (E.P.); (D.C.M.)
- Correspondence: (M.P.); (R.A.)
| | - Rosaria Ciriminna
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via U. La Malfa 153, 90146 Palermo, Italy; (A.S.); (R.C.)
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Konagaya K, Riza DFA, Ogawa Y, Kohno Y, Kuramoto M, Takahashi N, Suzuki T, Kondo N. Autofluorescence changes of tomato surface tissues during overripening. Photochem Photobiol Sci 2020; 19:879-884. [PMID: 32579662 DOI: 10.1039/d0pp00125b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated the autofluorescence of tomato surface tissues during overripening at 25 °C for 13 days. Microscopic images and fluorescence spectra of tissues, including the epidermis and cuticle, were examined (excitation at 360 nm), revealing that the autofluorescence changes were related to the epidermis, particularly the fluorophores in the cuticle.
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Affiliation(s)
- Keiji Konagaya
- Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, 606-8502, Kyoto-shi, Kyoto, Japan. .,Faculty of Collaborative Regional Innovation, Ehime University, 3 Bunkyo-cho, 790-8577, Matsuyama-shi, Ehime, Japan.
| | - Dimas Firmanda Al Riza
- Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, 606-8502, Kyoto-shi, Kyoto, Japan.,Department of Agricultural Engineering, Faculty of Agricultural Technology, University of Brawijaya, 65145, Jl. Veteran, Malang, Indonesia
| | - Yuichi Ogawa
- Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, 606-8502, Kyoto-shi, Kyoto, Japan
| | - Yasushi Kohno
- Ehime Research Institute of Agriculture, Forestry and Fisheries, Ko 311, Kaminanba, 799-2405, Matsuyama-shi, Ehime, Japan
| | - Makoto Kuramoto
- Advanced Research Support Centre, Ehime University, 2-5, Bunkyo-cho, 790-8577, Matsuyama-shi, Ehime, Japan
| | - Noriko Takahashi
- Graduate School of Agriculture, Ehime University, 3-5-7, Tarumi, 790-0905, Matsuyama-shi, Ehime, Japan
| | - Tetsuhito Suzuki
- Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, 606-8502, Kyoto-shi, Kyoto, Japan
| | - Naoshi Kondo
- Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, 606-8502, Kyoto-shi, Kyoto, Japan
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45
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Dimopoulos N, Tindjau R, Wong DCJ, Matzat T, Haslam T, Song C, Gambetta GA, Kunst L, Castellarin SD. Drought stress modulates cuticular wax composition of the grape berry. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3126-3141. [PMID: 31985780 PMCID: PMC7260727 DOI: 10.1093/jxb/eraa046] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/24/2020] [Indexed: 05/08/2023]
Abstract
Drought events are a major challenge for many horticultural crops, including grapes, which are often cultivated in dry and warm climates. It is not understood how the cuticle contributes to the grape berry response to water deficit (WD); furthermore, the cuticular waxes and the related biosynthetic pathways are poorly characterized in this fruit. In this study, we identified candidate wax-related genes from the grapevine genome by phylogenetic and transcriptomic analyses. Developmental and stress response expression patterns of these candidates were characterized across pre-existing RNA sequencing data sets and confirmed a high responsiveness of the pathway to environmental stresses. We then characterized the developmental and WD-induced changes in berry cuticular wax composition, and quantified differences in berry transpiration. Cuticular aliphatic wax content was modulated during development and an increase was observed under WD, with wax esters being strongly up-regulated. These compositional changes were related to up-regulated candidate genes of the aliphatic wax biosynthetic pathway, including CER10, CER2, CER3, CER1, CER4, and WSD1. The effect of WD on berry transpiration was not significant. This study indicates that changes in cuticular wax amount and composition are part of the metabolic response of the grape berry to WD, but these changes do not reduce berry transpiration.
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Affiliation(s)
- Nicolas Dimopoulos
- Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
| | - Ricco Tindjau
- Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
| | - Darren C J Wong
- Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
| | - Till Matzat
- Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
| | - Tegan Haslam
- Department of Botany, The University of British Columbia, Vancouver, BC, Canada
| | - Changzheng Song
- Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
| | - Gregory A Gambetta
- EGFV, Bordeaux-Sciences Agro, INRA, Univ. Bordeaux, ISVV, Villenave d’Ornon, France
| | - Ljerka Kunst
- Department of Botany, The University of British Columbia, Vancouver, BC, Canada
| | - Simone D Castellarin
- Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
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46
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Lv G, Du C, Ma F, Shen Y, Zhou J. In situ detection of rice leaf cuticle responses to nitrogen supplies by depth-profiling Fourier transform photoacoustic spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 228:117759. [PMID: 31708462 DOI: 10.1016/j.saa.2019.117759] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 10/24/2019] [Accepted: 11/03/2019] [Indexed: 06/10/2023]
Abstract
Plant cuticle is an important interface on the outmost region of plant and will make the response to environmental changes. However, research about how the variable nutritional status affect plant cuticle is limited. This was the first report about the manners of rice leaf cuticle in answer to different nutritional circumstances of nitrogen detected by the Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS) which with a main superiority for in situ and depth-profiling in mid-infrared range. Rice leaves from the seedlings treated with three nitrogen levels designed as low (22N1), medium (N2) and high (N3) concentration were scanned by three moving mirror velocities (0.32 cm s-1, 0.47 cm s-1, and 0.63 cm s-1) at 900-4000 cm-1 to acquire the spectra of leaf surfaces. Well-resolved peaks had been detected at 3400, 2800, 1650, 1520 and 1050 cm-1. Combining with the structures and compositions of cuticle, the spectra recorded with 0.63 cm s-1 were identified to be from cuticle, and were used to analyze the responses of cuticle. Through curve-fitting, the absorption ratio of the peaks at (cm-1) 1050/3400, 1050/2800 and 1650/2800 shown regular changes,which were suggested to corresponded with ν(CO)/ν(OH), ν(CO)/ν(CH) and ν(C=C)/ν(CH) mainly. These ratios were supported to reflect the amount or variation of cuticle components, such as cutin, fatty alcohols, acids and unsaturated compounds. It provided insights about how nitrogen affected cuticles and showed great potentials to utilized FTIR-PAS for detecting cuticle variations.
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Affiliation(s)
- Gaoqiang Lv
- The State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy Sciences, Beijing 100049, China
| | - Changwen Du
- The State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Fei Ma
- The State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yazhen Shen
- The State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Jianmin Zhou
- The State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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47
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Zhang Y, Du Z, Han Y, Chen X, Kong X, Sun W, Chen C, Chen M. Plasticity of the Cuticular Transpiration Barrier in Response to Water Shortage and Resupply in Camellia sinensis: A Role of Cuticular Waxes. FRONTIERS IN PLANT SCIENCE 2020; 11:600069. [PMID: 33505410 PMCID: PMC7829210 DOI: 10.3389/fpls.2020.600069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/26/2020] [Indexed: 05/08/2023]
Abstract
The cuticle is regarded as a non-living tissue; it remains unknown whether the cuticle could be reversibly modified and what are the potential mechanisms. In this study, three tea germplasms (Wuniuzao, 0202-10, and 0306A) were subjected to water deprivation followed by rehydration. The epicuticular waxes and intracuticular waxes from both leaf surfaces were quantified from the mature 5th leaf. Cuticular transpiration rates were then measured from leaf drying curves, and the correlations between cuticular transpiration rates and cuticular wax coverage were analyzed. We found that the cuticular transpiration barriers were reinforced by drought and reversed by rehydration treatment; the initial weak cuticular transpiration barriers were preferentially reinforced by drought stress, while the original major cuticular transpiration barriers were either strengthened or unaltered. Correlation analysis suggests that cuticle modifications could be realized by selective deposition of specific wax compounds into individual cuticular compartments through multiple mechanisms, including in vivo wax synthesis or transport, dynamic phase separation between epicuticular waxes and the intracuticular waxes, in vitro polymerization, and retro transportation into epidermal cell wall or protoplast for further transformation. Our data suggest that modifications of a limited set of specific wax components from individual cuticular compartments are sufficient to alter cuticular transpiration barrier properties.
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Affiliation(s)
- Yi Zhang
- Henan Key Laboratory of Tea Plant Biology, College of Life Sciences, Xinyang Normal University, Xinyang, China
- Horticultural Plant Biology and Metabolomics Center, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zhenghua Du
- Horticultural Plant Biology and Metabolomics Center, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yanting Han
- Henan Key Laboratory of Tea Plant Biology, College of Life Sciences, Xinyang Normal University, Xinyang, China
| | - Xiaobing Chen
- Horticultural Plant Biology and Metabolomics Center, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiangrui Kong
- Tea Research Institute, Fujian Academy of Agricultural Sciences, Fuan, China
| | - Weijiang Sun
- Anxi College of Tea Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Changsong Chen
- Tea Research Institute, Fujian Academy of Agricultural Sciences, Fuan, China
| | - Mingjie Chen
- Henan Key Laboratory of Tea Plant Biology, College of Life Sciences, Xinyang Normal University, Xinyang, China
- *Correspondence: Mingjie Chen, ;
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48
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Diarte C, Lai PH, Huang H, Romero A, Casero T, Gatius F, Graell J, Medina V, East A, Riederer M, Lara I. Insights Into Olive Fruit Surface Functions: A Comparison of Cuticular Composition, Water Permeability, and Surface Topography in Nine Cultivars During Maturation. FRONTIERS IN PLANT SCIENCE 2019; 10:1484. [PMID: 31798618 PMCID: PMC6878217 DOI: 10.3389/fpls.2019.01484] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 10/25/2019] [Indexed: 05/02/2023]
Abstract
Olive (Olea europaea L.) growing has outstanding economic relevance in Spain, the main olive oil producer and exporter in the world. Fruit skin properties are very relevant for fruit and oil quality, water loss, and susceptibility to mechanical damage, rots, and infestations, but limited research focus has been placed on the cuticle of intact olive fruit. In this work, fruit samples from nine olive cultivars ("Arbequina," "Argudell," "Empeltre," "Farga," "Manzanilla," "Marfil," "Morrut," "Picual," and "Sevillenca") were harvested from an experimental orchard at three different ripening stages (green, turning, and ripe), and cuticular membranes were enzymatically isolated from fruit skin. The total contents of cuticular wax and cutin significantly differed among cultivars both in absolute and in relative terms. The wax to cutin ratio generally decreased along fruit maturation, with the exception of "Marfil" and "Picual." In contrast, increased water permeance values in ripe fruit were observed uniquely for "Argudell," "Morrut," and "Marfil" fruit. The toluidine blue test revealed surface discontinuities on green samples of "Argudell," "Empeltre," "Manzanilla," "Marfil," and "Sevillenca" fruit, but not on "Arbequina," "Farga," "Morrut," or "Picual." No apparent relationship was found between water permeability and total wax coverage or the results of the toluidine blue test. The composition of cuticular waxes and cutin monomers was analyzed in detail, and sections of fruit pericarp were stained in Sudan IV for microscopy observations. Skin surface topography was also studied by means of fringe projection, showing large differences in surface roughness among the cultivars, "Farga" and "Morrut" fruits displaying the most irregular surfaces. Cultivar-related differences in cuticle and surface features of fruit are presented and discussed.
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Affiliation(s)
- Clara Diarte
- Universitat de Lleida, Lleida, Spain
- Postharvest Unit-XaRTA, AGROTÈCNIO, Lleida, Spain
| | - Po-Han Lai
- Massey Agrifood Technology Partnership, Massey University, Palmerston North, New Zealand
| | - Hua Huang
- Julius-von-Sachs Institut für Biowissenschaften, Universität Würzburg, Würzburg, Germany
| | - Agustí Romero
- Oliviculture, Oil Science and Nuts, IRTA-Mas de Bover, Constantí, Spain
| | | | | | - Jordi Graell
- Universitat de Lleida, Lleida, Spain
- Postharvest Unit-XaRTA, AGROTÈCNIO, Lleida, Spain
| | - Vicente Medina
- Universitat de Lleida, Lleida, Spain
- Applied Plant Biotechnology, AGROTÈCNIO, Lleida, Spain
| | - Andrew East
- Massey Agrifood Technology Partnership, Massey University, Palmerston North, New Zealand
| | - Markus Riederer
- Julius-von-Sachs Institut für Biowissenschaften, Universität Würzburg, Würzburg, Germany
| | - Isabel Lara
- Universitat de Lleida, Lleida, Spain
- Postharvest Unit-XaRTA, AGROTÈCNIO, Lleida, Spain
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49
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Collins PP, O'donoghue EM, Rebstock R, Tiffin HR, Sutherland PW, Schröder R, McAtee PA, Prakash R, Ireland HS, Johnston JW, Atkinson RG, Schaffer RJ, Hallett IC, Brummell DA. Cell type-specific gene expression underpins remodelling of cell wall pectin in exocarp and cortex during apple fruit development. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:6085-6099. [PMID: 31408160 DOI: 10.1093/jxb/erz370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
In apple (Malus×domestica) fruit, the different layers of the exocarp (cuticle, epidermis, and hypodermis) protect and maintain fruit integrity, and resist the turgor-driven expansion of the underlying thin-walled cortical cells during growth. Using in situ immunolocalization and size exclusion epitope detection chromatography, distinct cell type differences in cell wall composition in the exocarp were revealed during apple fruit development. Epidermal cell walls lacked pectic (1→4)-β-d-galactan (associated with rigidity), whereas linear (1→5)-α-l-arabinan (associated with flexibility) was exclusively present in the epidermal cell walls in expanding fruit and then appeared in all cell types during ripening. Branched (1→5)-α-l-arabinan was uniformly distributed between cell types. Laser capture microdissection and RNA sequencing (RNA-seq) were used to explore transcriptomic differences controlling cell type-specific wall modification. The RNA-seq data indicate that the control of cell wall composition is achieved through cell-specific gene expression of hydrolases. In epidermal cells, this results in the degradation of galactan side chains by possibly five β-galactosidases (BGAL2, BGAL7, BGAL10, BGAL11, and BGAL103) and debranching of arabinans by α-arabinofuranosidases AF1 and AF2. Together, these results demonstrate that flexibility and rigidity of the different cell layers in apple fruit during development and ripening are determined, at least in part, by the control of cell wall pectin remodelling.
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Affiliation(s)
- Patrick P Collins
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
- School of Biological Sciences, The University of Auckland, Auckland, New Zealand
| | | | - Ria Rebstock
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | - Heather R Tiffin
- PFR, Food Industry Science Centre, Palmerston North, New Zealand
| | - Paul W Sutherland
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | - Roswitha Schröder
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | - Peter A McAtee
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | - Roneel Prakash
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | - Hilary S Ireland
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | | | - Ross G Atkinson
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | - Robert J Schaffer
- School of Biological Sciences, The University of Auckland, Auckland, New Zealand
- PFR, Motueka, New Zealand
| | - Ian C Hallett
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
| | - David A Brummell
- The New Zealand Institute for Plant and Food Research Limited (PFR), Mount Albert Research Centre, Auckland, New Zealand
- PFR, Food Industry Science Centre, Palmerston North, New Zealand
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50
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Chechanovsky N, Hovav R, Frenkel R, Faigenboim A, Eselson Y, Petreikov M, Moy M, Shen S, Schaffer AA. Low temperature upregulates cwp expression and modifies alternative splicing patterns, increasing the severity of cwp-induced tomato fruit cuticular microfissures. HORTICULTURE RESEARCH 2019; 6:122. [PMID: 31728197 PMCID: PMC6838111 DOI: 10.1038/s41438-019-0204-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 08/12/2019] [Accepted: 09/12/2019] [Indexed: 05/23/2023]
Abstract
The cwp (cuticular water permeability) gene controls the development of cuticular microfissuring and subsequent fruit dehydration in tomato. The gene underwent silencing in the evolution of the fleshy cultivated tomato but is expressed in the primitive wild tomato relatives. The introgression of the expressed allele from the wild S. habrochaites (cwp h ) into the cultivated tomato (Solanum lycopersicum) leads to the phenotype of fruit water loss during and following ripening. In this report, we show that low temperature impacts on the severity of the cuticular microfissure phenotype via a combination of effects on both expression and alternative splicing of cwp h . The cwp gene, comprising four exons and three introns, undergoes post-transcriptional alternative splicing processes, leading to seven alternative transcripts that differ in reading-frame lengths. Transgenic plants expressing each of the alternative transcripts identified the longest reading frame (VAR1) as the functional splice variant. Low temperature led to a strong upregulation of cwp h expression, compounded by an increase in the relative proportion of the functional VAR1 transcript, leading to increased severity of microfissuring of the cuticle. In summary, we demonstrate the molecular mechanism behind the horticultural phenomenon of the low-temperature effect on cuticular microfissures in the dehydrating tomato.
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Affiliation(s)
- Noam Chechanovsky
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Ran Hovav
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Rina Frenkel
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Adi Faigenboim
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Yelena Eselson
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Marina Petreikov
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Michal Moy
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Shmuel Shen
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
| | - Arthur A. Schaffer
- Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization, Rishon LeZion, Israel
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