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Omar SA, Ashokhan S, Abdul Majid N, Karsani SA, Lau BYC, Yaacob JS. Enhanced azadirachtin production in neem (Azadirachta indica) callus through NaCl elicitation: Insights into differential protein regulation via shotgun proteomics. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 199:105778. [PMID: 38458685 DOI: 10.1016/j.pestbp.2024.105778] [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: 05/02/2023] [Revised: 09/19/2023] [Accepted: 01/09/2024] [Indexed: 03/10/2024]
Abstract
With their remarkable bioactivity and evolving commercial importance, plant secondary metabolites (PSMs) have gained significant research interest in recent years. Plant tissue culture serves as a credible tool to examine how abiotic stresses modulate the production of PSMs, enabling clear insights into plant stress responses and the prospects for controlled synthesis of bioactive compounds. Azadirachta indica, or neem has been recognized as a repository of secondary metabolites for centuries, particularly for the compound named azadirachtin, due to its bio-pesticidal and high antioxidant properties. Introducing salt stress as an elicitor makes it possible to enhance the synthesis of secondary metabolites, specifically azadirachtin. Thus, in this research, in vitro callus cultures of neem were micro-propagated and induced with salinity stress to explore their effects on the production of azadirachtin and identify potential proteins associated with salinity stress through comparative shotgun proteomics (LCMS/MS). To induce salinity stress, 2-month-old calli were subjected to various concentrations of NaCl (0.05-1.5%) for 4 weeks. The results showed that the callus cultures were able to adapt and survive in the salinity treatments, but displayed a reduction in fresh weight as the NaCl concentration increased. Notably, azadirachtin production was significantly enhanced in the salinity treatment compared to control, where 1.5% NaCl-treated calli produced the highest azadirachtin amount (10.847 ± 0.037 mg/g DW). The proteomics analysis showed that key proteins related to primary metabolism, such as defence, energy, cell structure, redox, transcriptional and photosynthesis, were predominantly differentially regulated (36 upregulated and 93 downregulated). While a few proteins were identified as being regulated in secondary metabolism, they were not directly involved in the synthesis of azadirachtin. In conjunction with azadirachtin elicitation, salinity stress treatment could therefore be successfully applied in commercial settings for the controlled synthesis of azadirachtin and other plant-based compounds. Further complementary omics approaches can be employed to enhance molecular-level modifications, to facilitate large-scale production of bioactive compounds in the future.
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Affiliation(s)
- Siti Ainnsyah Omar
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Sharmilla Ashokhan
- School of Biotechnology, MILA University, Putra Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - Nazia Abdul Majid
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Saiful Anuar Karsani
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Benjamin Yii Chung Lau
- Malaysian Palm Oil Board, No. 6, Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia
| | - Jamilah Syafawati Yaacob
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Centre for Research in Biotechnology for Agriculture (CEBAR), Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
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Li L, Du L, Cao Q, Yang Z, Liu Y, Yang H, Duan X, Meng Z. Salt Tolerance Evaluation of Cucumber Germplasm under Sodium Chloride Stress. PLANTS (BASEL, SWITZERLAND) 2023; 12:2927. [PMID: 37631139 PMCID: PMC10459999 DOI: 10.3390/plants12162927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/29/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023]
Abstract
Cucumber (Cucumis sativus L.) is an important horticultural crop worldwide. Sodium (Na+) and chloride (Cl-) in the surface soil are the major limiting factors in coastal areas of Shandong Province in China. Therefore, to understand the mechanism used by cucumber to adapt to sodium chloride (NaCl), we analyzed the phenotypic and physiological indicators of eighteen cucumber germplasms after three days under 100 and 150 mM NaCl treatment. A cluster analysis revealed that eighteen germplasms could be divided into five groups based on their physiological indicators. The first three groups consisted of seven salt-tolerant and medium salt-tolerant germplasms, including HLT1128h, Zhenni, and MC2065. The two remaining groups consisted of five medium salt-sensitive germplasms, including DM26h and M1-2-h-10, and six salt-sensitive germplasms including M1XT and 228. A principal component analysis revealed that the trend of comprehensive scores was consistent with the segmental cluster analysis and survival rates of cucumber seedlings. Overall, the phenotype, comprehensive survival rate, cluster analysis, and principal component analysis revealed that the salt-tolerant and salt-sensitive germplasms were Zhenni, F11-15, MC2065, M1XT, M1-2-h-10, and DM26h. The results of this study will provide references to identify or screen salt-tolerant cucumber germplasms and lay a foundation for breeding salt-tolerant cucumber varieties.
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Affiliation(s)
- Libin Li
- Key Laboratory of Greenhouse Vegetable Biology of Shandong Province, Vegetable Science Observation and Experiment Station in Huang—Huai Region of Ministry of Agriculture (Shandong), Shandong Branch of National Vegetable Improvement Center, Vegetable Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China (Q.C.)
| | - Lianda Du
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, China
| | - Qiwei Cao
- Key Laboratory of Greenhouse Vegetable Biology of Shandong Province, Vegetable Science Observation and Experiment Station in Huang—Huai Region of Ministry of Agriculture (Shandong), Shandong Branch of National Vegetable Improvement Center, Vegetable Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China (Q.C.)
| | - Zonghui Yang
- Key Laboratory of Greenhouse Vegetable Biology of Shandong Province, Vegetable Science Observation and Experiment Station in Huang—Huai Region of Ministry of Agriculture (Shandong), Shandong Branch of National Vegetable Improvement Center, Vegetable Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China (Q.C.)
| | - Yihan Liu
- College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Hua Yang
- College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Xi Duan
- College of Agricultural Science and Technology, Shandong Agriculture and Engineering University, Jinan 250100, China
| | - Zhaojuan Meng
- Key Laboratory of Greenhouse Vegetable Biology of Shandong Province, Vegetable Science Observation and Experiment Station in Huang—Huai Region of Ministry of Agriculture (Shandong), Shandong Branch of National Vegetable Improvement Center, Vegetable Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China (Q.C.)
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Tiwari D, Kewlani P, Gaira KS, Bhatt ID, Sundriyal RC, Pande V. Predicting phytochemical diversity of medicinal and aromatic plants (MAPs) across eco-climatic zones and elevation in Uttarakhand using Generalized Additive Model. Sci Rep 2023; 13:10888. [PMID: 37407604 DOI: 10.1038/s41598-023-37495-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 06/22/2023] [Indexed: 07/07/2023] Open
Abstract
The present study uses a systematic approach to explore the phytochemical composition of medicinal plants from Uttarakhand, Western Himalaya. The phytochemical composition of medicinal plants was analyzed based on (i) the presence of different chemical groups and (ii) bioactive compounds. The Generalized Additive Model (GAM) analysis was used to predict the occurrence of chemical groups and active compounds across different eco-climatic zones and the elevation in Uttarakhand. A total of 789 medicinal plants represented by 144 taxonomic families were screened to explore the phytochemical diversity of the medicinal plants of Uttarakhand. These medicinal plant species are signified in different life forms such as herbs (58.86%), shrubs (18.24%), trees (17.48%), ferns (2.38%), and climbers (2.13%). The probability of occurrence of the chemical groups found in tropical, sub-tropical, and warm temperate eco-climatic zones, whereas active compounds have a high Probability towards alpine, sub-alpine, and cool temperate zones. The GAM predicted that the occurrence of species with active compounds was declining significantly (p < 0.01), while total active compounds increased across elevation (1000 m). While the occurrence of species with the chemical group increased, total chemical groups were indicated to decline with increasing elevation from 1000 m (p < 0.000). The current study is overwhelmed to predict the distribution of phytochemicals in different eco-climatic zones and elevations using secondary information, which offers to discover bioactive compounds of the species occurring in the different eco-climatic habitats of the region and setting the priority of conservation concerns. However, the study encourages the various commercial sectors, such as pharmaceutical, nutraceutical, chemical, food, and cosmetics, to utilize unexplored species. In addition, the study suggests that prioritizing eco-climatic zones and elevation based on phytochemical diversity should be a factor of concern in the Himalayan region, especially under the climate change scenario.
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Affiliation(s)
- Deepti Tiwari
- G. B. Pant National Institute of Himalayan Environment, Kosi-Katarmal, Almora, Uttarakhand, 263 643, India
| | - Pushpa Kewlani
- G. B. Pant National Institute of Himalayan Environment, Kosi-Katarmal, Almora, Uttarakhand, 263 643, India
| | - Kailash S Gaira
- G.B. Pant National Institute of Himalayan Environment, Sikkim Regional Centre, Pangthang, Gangtok, Sikkim, India
| | - Indra D Bhatt
- G. B. Pant National Institute of Himalayan Environment, Kosi-Katarmal, Almora, Uttarakhand, 263 643, India.
| | - R C Sundriyal
- Department of Forestry and Natural Resources, HNB Garhwal University, Srinagar, Garhwal, 249169, Uttarakhand, India
| | - Veena Pande
- Department of Biotechnology, Kumaun University, Nainital, Uttarakhand, India
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Solouki A, Zare Mehrjerdi M, Azimi R, Aliniaeifard S. Improving basil (Ocimum basilicum L.) essential oil yield following down-regulation of photosynthetic functionality by short-term application of abiotic elicitors. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2023. [DOI: 10.1016/j.bcab.2023.102675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Sikron-Persi N, Granot G, Batushansky A, Toubiana D, Grafi G, Fait A. Mass spectrometry-based metabolite profiling reveals functional seasonal shifts in the metabolome of Zygophyllum dumosum Boiss and its relation to environmental conditions. PLANTA 2023; 258:10. [PMID: 37269337 DOI: 10.1007/s00425-023-04168-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 05/25/2023] [Indexed: 06/05/2023]
Abstract
MAIN CONCLUSION A multi-year study of perennial Z. dumosum shows a consistent seasonal pattern in the changes of petiole metabolism, involving mainly organic acids, polyols, phenylpropanoids, sulfate conjugates, and piperazines. GC-MS and UPLC-QTOF-MS-based metabolite profiling was performed on the petioles of the perennial desert shrub Zygophyllum dumosum Boiss (Zygophyllaceae). The petioles, which are physiologically functional throughout the year and, thus, exposed to seasonal rhythms, were collected every month for 3 years from their natural ecosystem on a southeast-facing slope. Results showed a clear multi-year pattern following seasonal successions, despite different climate conditions, i.e., rainy and drought years, throughout the research period. The metabolic pattern of change encompassed an increase in the central metabolites, including most polyols, e.g., stress-related D-pinitol, organic and sugar acids, and in the dominant specialized metabolites, which were tentatively identified as sulfate, flavonoid, and piperazine conjugates during the summer-autumn period, while significantly high levels of free amino acids were detected during the winter-spring period. In parallel, the levels of most sugars (including glucose and fructose) increased in the petioles at the flowering stage at the beginning of the spring, while most of the di- and tri-saccharides accumulated at the beginning of seed development (May-June). Analysis of the conserved seasonal metabolite pattern of change shows that metabolic events are mostly related to the stage of plant development and its interaction with the environment and less to environmental conditions per se.
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Affiliation(s)
- Noga Sikron-Persi
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sde Boker Campus, 84990, Midreshet Ben-Gurion, Israel
| | - Gila Granot
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sde Boker Campus, 84990, Midreshet Ben-Gurion, Israel
| | - Albert Batushansky
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sde Boker Campus, 84990, Midreshet Ben-Gurion, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, 84105, Beer Sheva, Israel
| | - David Toubiana
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sde Boker Campus, 84990, Midreshet Ben-Gurion, Israel
| | - Gideon Grafi
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sde Boker Campus, 84990, Midreshet Ben-Gurion, Israel
| | - Aaron Fait
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sde Boker Campus, 84990, Midreshet Ben-Gurion, Israel.
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Bouyahya A, Taha D, Benali T, Zengin G, El Omari N, El Hachlafi N, Khalid A, Abdalla AN, Ardianto C, Tan CS, Ming LC, Sahib N. Natural sources, biological effects, and pharmacological properties of cynaroside. Biomed Pharmacother 2023; 161:114337. [PMID: 36812715 DOI: 10.1016/j.biopha.2023.114337] [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: 11/18/2022] [Revised: 01/19/2023] [Accepted: 01/27/2023] [Indexed: 02/22/2023] Open
Abstract
Cynaroside is a flavonoid, isolated from several species belonging to the Apiaceae, Poaceae, Lamiaceae, Solanaceae, Zingiberaceae, Compositae and other families and it can be extracted from seeds, roots, stems, leaves, barks, flowers, fruits, aerial parts, and the whole plant of these species. This paper discloses the current state of knowledge on the biological/pharmacological effects and mode of action to better understand the numerous health benefits of cynaroside. Several research works revealed that cynaroside could have beneficial effects on various human pathologies. Indeed, this flavonoid exerts antibacterial, antifungal, antileishmanial, antioxidant, hepatoprotective, antidiabetic, anti-inflammatory, and anticancer effects. Additionally, cynaroside exhibits its anticancer effects by blocking MET/AKT/mTOR axis by decreasing the phosphorylation level of AKT, mTOR, and P70S6K. For antibacterial activity, cynaroside reduces biofilm development of Pseudomonas aeruginosa and Staphylococcus aureus. Moreover, the incidence of mutations leading to ciprofloxacin resistance in Salmonella typhimurium was reduced after the treatment with cynaroside. In addition, cynaroside inhibited the production of reactive oxygen species (ROS), which reduced the damage to mitochondrial membrane potential caused by hydrogen peroxide (H2O2). It also enhanced the expression of the anti-apoptotic protein Bcl-2 and lowered that of the pro-apoptotic protein Bax. Cynaroside abrogated the up-regulation of c-Jun N-terminal kinase (JNK) and p53 protein expression triggered by H2O2. All these findings suggest that cynaroside could be used to prevent certain human diseases.
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Affiliation(s)
- Abdelhakim Bouyahya
- Laboratory of Human Pathologies Biology, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Morocco.
| | - Douae Taha
- Laboratory of Spectroscopy, Molecular Modelling Materials, Nanomaterials Water and Environment-CERNE2D, Faculty of Sciences, Mohammed V University in Rabat, Morocco.
| | - Taoufiq Benali
- Environment and Health Team, Polydisciplinary Faculty of Safi, Cadi Ayyad University, Marrakesh-Safi 46030, Morocco.
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya 42250, Turkey.
| | - Nasreddine El Omari
- Laboratory of Histology, Embryology and Cytogenetic, Faculty of Medicine and Pharmacy, Mohammed V. University in Rabat, B.P. 6203, Rabat 10000, Morocco.
| | - Naoufal El Hachlafi
- Microbial Biotechnology and Bioactive Molecules Laboratory, Sciences and Technologies Faculty, Sidi Mohmed Ben Abdellah University, Fez B.P. 2626, Morocco.
| | - Asaad Khalid
- 7 Substance Abuse and Toxicology Research Center, Jazan University, Jazan 45142, Saudi Arabia; Medicinal and Aromatic Plants and Traditional Medicine Research Institute, National Center for Research, P.O. Box 2404, Khartoum, Sudan.
| | - Ashraf N Abdalla
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia.
| | - Chrismawan Ardianto
- Department of Pharmacy Practice, Faculty of Pharmacy, Universitas Airlangga, Surabaya 60115, Indonesia.
| | - Ching Siang Tan
- School of Pharmacy, KPJ Healthcare University College, 71800 Nilai, Malaysia.
| | - Long Chiau Ming
- Department of Pharmacy Practice, Faculty of Pharmacy, Universitas Airlangga, Surabaya 60115, Indonesia; PAPRSB Institute of Health Sciences, Universiti Brunei Darussalam, Gadong, Brunei Darussalam; School of Medical and Life Sciences, Sunway University, Sunway City 47500, Malaysia.
| | - Narjis Sahib
- Laboratoire d'Amélioration des Productions Agricoles, Biotechnologie et Environnement (LAPABE), Faculté des Sciences, Mohammed Premier University, Oujda 60000, Morocco.
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Biostimulatory Effects of Amino Acids on Phenylalanine Ammonia Lyase, Capsaicin Synthase, and Peroxidase Activities in Capsicum baccatum L. BIOLOGY 2022; 11:biology11050674. [PMID: 35625402 PMCID: PMC9138247 DOI: 10.3390/biology11050674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/07/2022] [Accepted: 04/26/2022] [Indexed: 12/03/2022]
Abstract
Simple Summary Very little is known about how biostimulants such as amino acids affect the enzymatic activity of peppers. The three crucial enzymes for the synthesis and degradation of capsaicinoids were studied in a 72 h time course. The activity of the two crucial enzymes for the synthesis of capsaicinoids increased in the first hour after foliar application and then gradually decreased to the baseline activity. Placenta exhibited higher enzyme activity and capsaicinoid content. Since capsaicinoids are widely consumed by humans, the use of various natural substances called biostimulants could improve the overall quality of peppers, which would mean high-yield and high-quality fruits. Abstract Biostimulants are widely used in agriculture because they can improve fruit quality and quantity. Less is known about how biostimulants act over time in plants, in our case peppers, and how they affect the enzyme activity of important enzymes for capsaicinoid synthesis. The biostimulatory effects of amino acids on the activities of phenylalanine ammonia lyase (PAL), capsaicin synthase (CS), and peroxidase (POX) were investigated in the pericarp and placenta of the chili pepper Capsicum baccatum L. cv. “Bishop Crown” over 72 h of application. The PAL and CS activities significantly increased in the placenta after 1 h of biostimulant application, with significant increases of 130% and 16%, respectively. The POX activity remained unchanged over the full 72 h in the placenta but significantly increased after 48 h in the pericarp (+53%). Total capsaicinoids increased in the first hour of biostimulant application, by 4.30 g/kg FW in the placenta (19%) and by 0.94 g/kg FW in the pericarp (+56%). Biostimulant application also increased total and individual capsaicinoids after 48 h in the chili placenta and pericarp. With improved methods for enzymatic determination, we gained new insights into the responses of chilies to biostimulant amino acids.
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Capsicum Leaves under Stress: Using Multi-Omics Analysis to Detect Abiotic Stress Network of Secondary Metabolism in Two Species. Antioxidants (Basel) 2022; 11:antiox11040671. [PMID: 35453356 PMCID: PMC9029244 DOI: 10.3390/antiox11040671] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 03/25/2022] [Accepted: 03/28/2022] [Indexed: 02/06/2023] Open
Abstract
The plant kingdom contains an enormous diversity of bioactive compounds which regulate plant growth and defends against biotic and abiotic stress. Some of these compounds, like flavonoids, have properties which are health supporting and relevant for industrial use. Many of these valuable compounds are synthesized in various pepper (Capsicum sp.) tissues. Further, a huge amount of biomass residual remains from pepper production after harvest, which provides an important opportunity to extract these metabolites and optimize the utilization of crops. Moreover, abiotic stresses induce the synthesis of such metabolites as a defense mechanism. Two different Capsicum species were therefore exposed to chilling temperature (24/18 ℃ vs. 18/12 ℃), to salinity (200 mM NaCl), or a combination thereof for 1, 7 and 14 days to investigate the effect of these stresses on the metabolome and transcriptome profiles of their leaves. Both profiles in both species responded to all stresses with an increase over time. All stresses resulted in repression of photosynthesis genes. Stress involving chilling temperature induced secondary metabolism whereas stresses involving salt repressed cell wall modification and solute transport. The metabolome analysis annotated putatively many health stimulating flavonoids (apigetrin, rutin, kaempferol, luteolin and quercetin) in the Capsicum biomass residuals, which were induced in response to salinity, chilling temperature or a combination thereof, and supported by related structural genes of the secondary metabolism in the network analysis.
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Neugart S, Tobler MA, Barnes PW. Rapid adjustment in epidermal UV sunscreen: Comparison of optical measurement techniques and response to changing solar UV radiation conditions. PHYSIOLOGIA PLANTARUM 2021; 173:725-735. [PMID: 34375003 DOI: 10.1111/ppl.13517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 06/02/2021] [Accepted: 07/29/2021] [Indexed: 06/13/2023]
Abstract
The accumulation of soluble and cell-wall bound UV-absorbing compounds (i.e., flavonoids) in the epidermis and the mesophyll of leaves is a response of plants to UV exposure. These compounds are known to function in UV screening, but they are also of potential value for food quality. One way to non-destructively monitor UV screening in leaves is by optical methods, from which UVA-PAM and Dualex instruments stand out. The degree and rapidity to which plants can modulate UV screening in response to fluctuating solar UV conditions is poorly understood. In this study, okra plants were exposed to two solar radiation treatments (near-ambient UV [+UV] and attenuated UV [-UV]) and the epidermal UV transmittance (TUV ; UVA-PAM) and flavonoid index (Dualex) were measured in the youngest and second youngest mature leaves over three consecutive days and within an individual day. The day-to-day (measured near solar noon) and diurnal (over the course of a day) measurements of leaf optical properties indicated that TUV decreased and flavonoid index increased in the adaxial epidermis ~50% until 15:00 CDT then returned close to morning values later in the day. Correlations between UV-B radiation and TUV and flavonoid index revealed highest values 30 min to 1 h prior to the measurements. These findings indicate that plants can respond quickly to fluctuating solar UV conditions and underlines the importance of the harvest-time point for health-promoting compounds in fruit and vegetables. Our findings also indicate that the UVA-PAM and the Dualex instruments are both suitable instruments to monitor rapid changes in UV screening in plants.
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Affiliation(s)
- Susanne Neugart
- Division Quality and Sensory of Plant Products, Georg-August-Universität Göttingen, Goettingen, Germany
- Department of Biological Sciences and Environment Program, Loyola University New Orleans, New Orleans, Louisiana
| | - Mark A Tobler
- Department of Biological Sciences and Environment Program, Loyola University New Orleans, New Orleans, Louisiana
| | - Paul W Barnes
- Department of Biological Sciences and Environment Program, Loyola University New Orleans, New Orleans, Louisiana
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Neugart S, Tobler MA, Barnes PW. The Function of Flavonoids in the Diurnal Rhythm under Rapidly Changing UV Conditions—A Model Study on Okra. PLANTS 2021; 10:plants10112268. [PMID: 34834632 PMCID: PMC8624821 DOI: 10.3390/plants10112268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 12/18/2022]
Abstract
Flavonoids are favored compounds in plant responses to UV exposure and act in UV absorption and antioxidant activity. Here, it was investigated, with okra as a model species, how fast plants can react to changing UV conditions and to what extent these reactions take place. Okra (Abelmoschus esculentus) plants were exposed to either full or nearly no UV radiation. The diurnal rhythm of the plants was driven by the UV radiation and showed up to a 50% increase of the flavonoid content (measured optically in the +UV plants). This was reflected only in the trends in UV-absorption and antioxidant activity of the extracts but not in the soluble flavonoid glycosides and hydroxycinnamic acid derivatives. In a second experiment, a transfer from a −UV to a +UV condition at 9:00 CDT showed the immediate start of the diurnal rhythm, while this did not occur if the transfer occurred later in the day; these plants only started a diurnal rhythm the following day. After an adaptation period of seven days, clear differences between the +UV and -UV plants could be found in all parameters, whereas plants transferred to the opposite UV condition settle between the +UV and -UV plants in all parameters. Broadly, it can be seen that the flavonoid contents and associated functions in the plant are subject to considerable changes within one day and within several days due to the UV conditions and that this can have a considerable impact on the quality of plant foods.
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Affiliation(s)
- Susanne Neugart
- Division Quality and Sensory of Plant Products, Georg-August-Universität Göttingen, 37075 Goettingen, Germany
- Department of Biological Sciences, Loyola University New Orleans, 6363 St. Charles Avenue, New Orleans, LA 70118, USA; (M.A.T.); (P.W.B.)
- Correspondence: ; Tel.: +49-551-3927958
| | - Mark A. Tobler
- Department of Biological Sciences, Loyola University New Orleans, 6363 St. Charles Avenue, New Orleans, LA 70118, USA; (M.A.T.); (P.W.B.)
| | - Paul W. Barnes
- Department of Biological Sciences, Loyola University New Orleans, 6363 St. Charles Avenue, New Orleans, LA 70118, USA; (M.A.T.); (P.W.B.)
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Hashim M, Ahmad B, Drouet S, Hano C, Abbasi BH, Anjum S. Comparative Effects of Different Light Sources on the Production of Key Secondary Metabolites in Plants In Vitro Cultures. PLANTS (BASEL, SWITZERLAND) 2021; 10:1521. [PMID: 34451566 PMCID: PMC8398697 DOI: 10.3390/plants10081521] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/18/2021] [Accepted: 07/23/2021] [Indexed: 05/13/2023]
Abstract
Plant secondary metabolites are known to have a variety of biological activities beneficial to human health. They are becoming more popular as a result of their unique features and account for a major portion of the pharmacological industry. However, obtaining secondary metabolites directly from wild plants has substantial drawbacks, such as taking a long time, posing a risk of species extinction owing to over-exploitation, and producing a limited quantity. Thus, there is a paradigm shift towards the employment of plant tissue culture techniques for the production of key secondary metabolites in vitro. Elicitation appears to be a viable method for increasing phytochemical content and improving the quality of medicinal plants and fruits and vegetables. In vitro culture elicitation activates the plant's defense response and increases the synthesis of secondary metabolites in larger proportions, which are helpful for therapeutic purposes. In this respect, light has emerged as a unique and efficient elicitor for enhancing the in vitro production of pharmacologically important secondary metabolites. Various types of light (UV, fluorescent, and LEDs) have been found as elicitors of secondary metabolites, which are described in this review.
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Affiliation(s)
- Mariam Hashim
- Department of Biotechnology, Kinnaird College for Women, Jail Road, Lahore 54000, Pakistan;
| | - Bushra Ahmad
- Shaheed Benazir Bhutto Women University, Peshawar 25000, Pakistan;
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRAE USC1328, Eure & Loir Campus, University of Orleans, 28000 Chartres, France; (S.D.); (C.H.)
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRAE USC1328, Eure & Loir Campus, University of Orleans, 28000 Chartres, France; (S.D.); (C.H.)
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 15320, Pakistan;
| | - Sumaira Anjum
- Department of Biotechnology, Kinnaird College for Women, Jail Road, Lahore 54000, Pakistan;
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12
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Schulz E, Tohge T, Winkler JB, Albert A, Schäffner AR, Fernie AR, Zuther E, Hincha DK. Natural Variation among Arabidopsis Accessions in the Regulation of Flavonoid Metabolism and Stress Gene Expression by Combined UV Radiation and Cold. PLANT & CELL PHYSIOLOGY 2021; 62:502-514. [PMID: 33544865 PMCID: PMC8286136 DOI: 10.1093/pcp/pcab013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 01/20/2021] [Indexed: 05/20/2023]
Abstract
Plants are constantly exposed to stressful environmental conditions. Plant stress reactions were mainly investigated for single stress factors. However, under natural conditions plants may be simultaneously exposed to different stresses. Responses to combined stresses cannot be predicted from the reactions to the single stresses. Flavonoids accumulate in Arabidopsis thaliana during exposure to UV-A, UV-B or cold, but the interactions of these factors on flavonoid biosynthesis were unknown. We therefore investigated the interaction of UV radiation and cold in regulating the expression of well-characterized stress-regulated genes, and on transcripts and metabolites of the flavonoid biosynthetic pathway in 52 natural Arabidopsis accessions that differ widely in their freezing tolerance. The data revealed interactions of cold and UV on the regulation of stress-related and flavonoid biosynthesis genes, and on flavonoid composition. In many cases, plant reactions to a combination of cold and UV were unique under combined stress and not predictable from the responses to the single stresses. Strikingly, all correlations between expression levels of flavonoid biosynthesis genes and flavonol levels were abolished by UV-B exposure. Similarly, correlations between transcript levels of flavonoid biosynthesis genes or flavonoid contents, and freezing tolerance were lost in the presence of UV radiation, while correlations with the expression levels of cold-regulated genes largely persisted. This may indicate different molecular cold acclimation responses in the presence or absence of UV radiation.
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Affiliation(s)
- Elisa Schulz
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam 14476, Germany
- MetaSysX GmbH, Am Mühlenberg 11, Potsdam 14476, Germany
| | - Takayuki Tohge
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam 14476, Germany
- Graduate School of Biological Science, Nara Institute of Science and Technology (NAIST), Ikoma, 630-0192 Japan
| | - J Barbro Winkler
- Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, Neuherberg 85764, Germany
| | - Andreas Albert
- Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, Neuherberg 85764, Germany
- Deutsches Patent- und Markenamt, Zweibrückenstr. 12, München 80331, Germany
| | - Anton R Schäffner
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, Neuherberg 85764, Germany
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam 14476, Germany
| | - Ellen Zuther
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam 14476, Germany
- Corresponding author: E-mail,
| | - Dirk K Hincha
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam 14476, Germany
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13
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Genzel F, Dicke MD, Junker-Frohn LV, Neuwohner A, Thiele B, Putz A, Usadel B, Wormit A, Wiese-Klinkenberg A. Impact of Moderate Cold and Salt Stress on the Accumulation of Antioxidant Flavonoids in the Leaves of Two Capsicum Cultivars. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6431-6443. [PMID: 34081868 DOI: 10.1021/acs.jafc.1c00908] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The horticultural production of bell peppers generates large quantities of residual biomass. Abiotic stress stimulates the production of protective flavonoids, so the deliberate application of stress to the plants after fruit harvest could provide a strategy to valorize horticultural residuals by increasing flavonoid concentrations, facilitating their industrial extraction. Here we exposed two Capsicum cultivars, a chilli and a bell pepper, to cold and salt stress and combinations thereof to determine their valorization potential. Noninvasive image-based phenotyping and multiparametric fluorescence measurements indicated that all stress treatments inhibited plant growth and reduced the leaf chlorophyll fluorescence index, with the chilli cultivar showing greater sensitivity. The fluorescence-based FLAV index allowed the noninvasive assessment of foliar luteolin glycosides. High-performance liquid chromatography-mass spectrometry (HPLC-MS) analysis showed that moderate cold increased the levels of two foliar antioxidant luteolin glycosides in both cultivars, with bell pepper containing the highest amounts (induced to maximum 5.5 mg g-1 DW cynaroside and 37.0 mg g-1 DW graveobioside A) after combined stress treatment. These data confirm the potential of abiotic stress for the valorization of residual leaf biomass to enhance the industrial extraction of antioxidant and bioactive flavonoids.
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Affiliation(s)
- Franziska Genzel
- Institute of Bio- and Geosciences-Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Max Daniel Dicke
- Institute of Bio- and Geosciences-Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Laura Verena Junker-Frohn
- Institute of Bio- and Geosciences-Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Andrea Neuwohner
- Institute of Bio- and Geosciences-Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Björn Thiele
- Institute of Bio- and Geosciences-Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Alexander Putz
- Institute of Bio- and Geosciences-Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Björn Usadel
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
- Institute of Bio- and Geosciences-Bioinformatics (IBG-4), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Alexandra Wormit
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
- Institute for Biology I-Botany, RWTH Aachen University, 52074 Aachen, Germany
| | - Anika Wiese-Klinkenberg
- Institute of Bio- and Geosciences-Plant Sciences (IBG-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Bioeconomy Science Center, Forschungszentrum Jülich, 52425 Jülich, Germany
- Institute of Bio- and Geosciences-Bioinformatics (IBG-4), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
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14
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Röhlen-Schmittgen S, Ellenberger J, Groher T, Hunsche M. Boosting leaf contents of rutin and solanesol in bio-waste of Solanum lycopersicum. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:888-897. [PMID: 32905983 DOI: 10.1016/j.plaphy.2020.08.035] [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: 04/30/2020] [Revised: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 05/10/2023]
Abstract
In tomato production, the accruing green biomass shows promising potential as source of health-promoting compounds, such as rutin and solanesol, that are of high interest due to their medicinal properties. Naturally, they accumulate in plants growing in suboptimal growing conditions, e.g. influenced by biotic and abiotic stressors. With the aim to evaluate the potential use of tomato residues as source, we analyzed both leaf metabolites during a complete cultivation cycle, while applying single and combined stresses practically realized in greenhouse production. In the late season, contents of both metabolites were significantly enhanced by nutrient deficit in combination with 2 °C colder nights for 4 weeks and prolonged for in total 9 weeks. Particularly, higher solanesol contents were achieved by salt stress and elevated temperature after one week, even stronger when combined with drought. At harvest, stressed plants consist of less green biomass reducing the overall economic potential. However, practicable abiotic stresses should be considered as potential tool to induce the accumulation of beneficial compounds. Extracting profitable metabolites from the green biomass of the model crop tomato supports the overall goal to promote sustainable approaches in horticultural production.
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Affiliation(s)
| | - Jan Ellenberger
- INRES Horticultural Science, University of Bonn, Auf dem Huegel 6, 53121, Bonn, Germany
| | - Tanja Groher
- INRES Horticultural Science, University of Bonn, Auf dem Huegel 6, 53121, Bonn, Germany; Agroscope, Taenikon, 8356, Ettenhausen, Switzerland
| | - Mauricio Hunsche
- INRES Horticultural Science, University of Bonn, Auf dem Huegel 6, 53121, Bonn, Germany; COMPO EXPERT International GmbH, 48155, Muenster, Germany
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15
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Korwin Krukowski P, Ellenberger J, Röhlen-Schmittgen S, Schubert A, Cardinale F. Phenotyping in Arabidopsis and Crops-Are We Addressing the Same Traits? A Case Study in Tomato. Genes (Basel) 2020; 11:E1011. [PMID: 32867311 PMCID: PMC7564427 DOI: 10.3390/genes11091011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 11/18/2022] Open
Abstract
The convenient model Arabidopsis thaliana has allowed tremendous advances in plant genetics and physiology, in spite of only being a weed. It has also unveiled the main molecular networks governing, among others, abiotic stress responses. Through the use of the latest genomic tools, Arabidopsis research is nowadays being translated to agronomically interesting crop models such as tomato, but at a lagging pace. Knowledge transfer has been hindered by invariable differences in plant architecture and behaviour, as well as the divergent direct objectives of research in Arabidopsis versus crops compromise transferability. In this sense, phenotype translation is still a very complex matter. Here, we point out the challenges of "translational phenotyping" in the case study of drought stress phenotyping in Arabidopsis and tomato. After briefly defining and describing drought stress and survival strategies, we compare drought stress protocols and phenotyping techniques most commonly used in the two species, and discuss their potential to gain insights, which are truly transferable between species. This review is intended to be a starting point for discussion about translational phenotyping approaches among plant scientists, and provides a useful compendium of methods and techniques used in modern phenotyping for this specific plant pair as a case study.
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Affiliation(s)
- Paolo Korwin Krukowski
- Plant Stress Lab, Department of Agriculture, Forestry and Food Sciences DISAFA-Turin University, 10095 Grugliasco, Italy; (A.S.); (F.C.)
| | - Jan Ellenberger
- INRES Horticultural Sciences, University of Bonn, 53121 Bonn, Germany;
| | | | - Andrea Schubert
- Plant Stress Lab, Department of Agriculture, Forestry and Food Sciences DISAFA-Turin University, 10095 Grugliasco, Italy; (A.S.); (F.C.)
| | - Francesca Cardinale
- Plant Stress Lab, Department of Agriculture, Forestry and Food Sciences DISAFA-Turin University, 10095 Grugliasco, Italy; (A.S.); (F.C.)
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